{"pageNumber":"76","pageRowStart":"1875","pageSize":"25","recordCount":2263,"records":[{"id":17612,"text":"ofr72283 - 1972 - Reconnaissance geology of the Bi'r Al Badriyah quadrangle, Kingdom of Saudi Arabia","interactions":[],"lastModifiedDate":"2012-02-02T00:07:22","indexId":"ofr72283","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"72-283","title":"Reconnaissance geology of the Bi'r Al Badriyah quadrangle, Kingdom of Saudi Arabia","docAbstract":"The Bi'r al Badriyah quadrangle covers an area of 2843 sq km in the extreme eastern part of the Precambrian Shield in central Saudi Arabia. The Precambrian rocks in the southeastern part of the area are unconformably overlain by limestone of Permian age, which occupies only a small part of the quadrangle. Three great sequences of Precambrian rocks are recognized and called, from oldest to youngest, the Halaban Group, the Bi'r Khountina Group, and the Murdama Group. From evidence within the quadrangle itself the three groups are seen to be separated by erosional unconformities, and the Halaban and Bi'r Khountina Groups are intruded by granitic and gabbroic plutonic rocks and a wide variety of dikes. Exposures north of the quadrangle show that the Murdama Group is also intruded by granitic rocks. \r\n\r\nThe Halaban Group, consists of three formations called, from oldest to youngest, the Umm Mushraha Formation, the Jebal al Egfool Formation, and the Wadi al Jifr Formation. These rocks are variably metamorphosed, but characteristically they are at the epidote-albite amphibolite facies of regional metamorphism, are polymetamorphic, and rest unconformably on ancient granite gneiss. The Umm Mushraha Formation consists of amphibolite, schistose andesite, and greenstone associated with minor meta-agglomerate, meta-graywacke, and marble. The Jebal al Egfool Formation consists of sheared and metamorphosed volcanic rocks of intermediate composition, and the Wadi al Jifr Formation is made up of metamorphosed felsic volcanic rocks. \r\n\r\nRocks of the Bi'r Khountina Group are rather similar to the Halaban Group in original composition, but they are separated from the Halaban by an angular unconformity and have distinctive formations of conglomerate (the Idsas Formation), marble (the Fawara Formation), and graywacke (the Abu Sawarir Formation) at the base. Most of the Bi'r Khountina Group consists of andesitic volcanic rocks in the Badriyah Formation. Mostly, the Bi'r Khountina Group is unmetamorphosed or feebly metamorphosed to the greenschist facies. Locally, as in the aureole of intrusive rocks, the Bi'r Khountina Group reaches higher metamorphic grades.\r\n\r\nThe rocks of the Murdama Group unconformably overlie the Bi'r Khountina Group, and basal conglomerates of the Murdama contain fragments of distinctive rocks intrusive into the Bi'r Khountina. The Murdama Group is composed of the Z'relba Formation, Consisting of conglomerate and schistose conglomerate and the Abt Formation, a thick sequence of laminated, mainly fine-grained, sedimentary rocks. Metamorphism in .the Murdama increases toward the north, and along the north edge of the area the Murdama Group is represented by chlorite-sericite schists. \r\n\r\nThree major episodes of folding are recorded in the Precambrian rocks. The earliest episode folded the rocks of the Halaban Group along north-trending axes which are now truncated by the unconformity at the base of the Bi'r Khountina Group. After the rocks of the Bi'r Khountina and Murdama Groups were deposited, the three groups were folded along northwest-trending axes of regional scale. Later, possibly at a time of major faulting along a northwesterly direction, the rocks were again folded on north-trending axes. \r\n\r\nSamples of rock materials collected at 105 localities in the quadrangle were analyzed for 27 elements. Only one anomalous value was found: a low positive anomaly for lead at the Umm Mushraha gold mine. Threshold amounts of Ag, B, Cr, Cu, La, Mn, Mo, NI, Sc, Sn, Ti, V, and Zr were detected. The distribution of copper and molybdenum suggests that two plutons of biotite-hornblende granite in the central part of the quadrangle, and the rocks between them, should be examined for possible disseminated copper and molybdenum of the porphyry type. The distribution of scandium and detrital scheelite suggests that a zone adjacent to phyllonite in the northeastern quarter of the quadrangle be examined for tungsten associated with amphibolite.","language":"ENGLISH","publisher":"U.S. Geological Survey,","doi":"10.3133/ofr72283","usgsCitation":"Overstreet, W.C., Whitlow, J.W., Kahr, V., and Ankary, A., 1972, Reconnaissance geology of the Bi'r Al Badriyah quadrangle, Kingdom of Saudi Arabia: U.S. Geological Survey Open-File Report 72-283, ii, 47 leaves :ill., map ;28 cm., https://doi.org/10.3133/ofr72283.","productDescription":"ii, 47 leaves :ill., map ;28 cm.","costCenters":[],"links":[{"id":151078,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1972/0283/report-thumb.jpg"},{"id":46808,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1972/0283/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":46809,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1972/0283/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a6fe4b07f02db640a86","contributors":{"authors":[{"text":"Overstreet, William C.","contributorId":73586,"corporation":false,"usgs":true,"family":"Overstreet","given":"William","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":177099,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Whitlow, J. W.","contributorId":63810,"corporation":false,"usgs":true,"family":"Whitlow","given":"J.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":177098,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kahr, V.P.","contributorId":88757,"corporation":false,"usgs":true,"family":"Kahr","given":"V.P.","affiliations":[],"preferred":false,"id":177101,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Ankary, A.O.","contributorId":74016,"corporation":false,"usgs":true,"family":"Ankary","given":"A.O.","affiliations":[],"preferred":false,"id":177100,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":17177,"text":"ofr7225 - 1972 - Geology of the Konakpinar--Sarica area, Sivas Province, Turkey","interactions":[],"lastModifiedDate":"2012-02-02T00:07:23","indexId":"ofr7225","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"72-25","title":"Geology of the Konakpinar--Sarica area, Sivas Province, Turkey","docAbstract":"The junction of several major structures and stratigraphic sequences is in the Konakpinar-Sarica area of central Turkey. Most of the area is underlain by Upper Jurassic to Cretaceous limeston and siltstone, early Tertiary sedimentary rock, and remnants of younger volcanic rocks and lacustrine deposits. The northeastern part of the area, however, is formed of serpentinite, of possible Cretaceous age, unconformably overlain by Upper Cretaceous conglomerate and siltstone that crop out extensively east of the area.\r\n\r\nThe regional structure changes direction in the area. Folds and faults change across a northerly striking hinge line from northeast trends on the west to northwest trends on the east. A north-trending regional fault zone is a little east of the hinge line. The northern part of this fault zone and a northwest-striking fault, a possible thrust, east of it form the boundary between the two stratigraphic provinces. The area northeast of this boundary is cut by a series of vertical northwest-trending faults that are downdropped on the southwest. A large northeast-trending fault that is part of a broad fault zone that extends from the Mediterranean Sea northeastward to Divrigi is in the northwest corner of the area. Some thrust faults cut the Cretaceous rocks in the western part of the area; the Upper Jurassic limestone may be allochthonous.\r\n\r\nThe only economic deposit known in the area is at the Otlukilise Iron Mine where iron is present in a sedimentary filling of sinkholesand as secondary replacement deposits in limestone at their borders. Minor deposits of chrome, copper, and coal also occur in the area.","language":"ENGLISH","publisher":"U.S. Geological Survey,","doi":"10.3133/ofr7225","usgsCitation":"Barosh, P.J., Sermin, S., Gencel, I., Sengun, M., and Ekren, F., 1972, Geology of the Konakpinar--Sarica area, Sivas Province, Turkey: U.S. Geological Survey Open-File Report 72-25, iii, 58 leaves :ill., maps ;28 cm., https://doi.org/10.3133/ofr7225.","productDescription":"iii, 58 leaves :ill., maps ;28 cm.","costCenters":[],"links":[{"id":150938,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1972/0025/report-thumb.jpg"},{"id":46319,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1972/0025/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":46320,"rank":401,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1972/0025/plate-2.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":46321,"rank":402,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1972/0025/plate-3.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":46322,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1972/0025/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4abde4b07f02db6742fe","contributors":{"authors":[{"text":"Barosh, Patrick James","contributorId":42184,"corporation":false,"usgs":true,"family":"Barosh","given":"Patrick","email":"","middleInitial":"James","affiliations":[],"preferred":false,"id":175270,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sermin, Salim","contributorId":82722,"corporation":false,"usgs":true,"family":"Sermin","given":"Salim","email":"","affiliations":[],"preferred":false,"id":175273,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gencel, Ilker","contributorId":69174,"corporation":false,"usgs":true,"family":"Gencel","given":"Ilker","email":"","affiliations":[],"preferred":false,"id":175272,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Sengun, Metin","contributorId":50915,"corporation":false,"usgs":true,"family":"Sengun","given":"Metin","email":"","affiliations":[],"preferred":false,"id":175271,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Ekren, Frank","contributorId":99166,"corporation":false,"usgs":true,"family":"Ekren","given":"Frank","email":"","affiliations":[],"preferred":false,"id":175274,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":14155,"text":"ofr72167 - 1972 - Distribution of selected elements in surficial marine sediments of the northern Gulf of Mexico continental shelf and slope","interactions":[{"subject":{"id":14155,"text":"ofr72167 - 1972 - Distribution of selected elements in surficial marine sediments of the northern Gulf of Mexico continental shelf and slope","indexId":"ofr72167","publicationYear":"1972","noYear":false,"title":"Distribution of selected elements in surficial marine sediments of the northern Gulf of Mexico continental shelf and slope"},"predicate":"SUPERSEDED_BY","object":{"id":6008,"text":"pp814 - 1973 - Distribution of selected elements in surficial marine sediments of the northern Gulf of Mexico continental shelf and slope","indexId":"pp814","publicationYear":"1973","noYear":false,"title":"Distribution of selected elements in surficial marine sediments of the northern Gulf of Mexico continental shelf and slope"},"id":1}],"supersededBy":{"id":6008,"text":"pp814 - 1973 - Distribution of selected elements in surficial marine sediments of the northern Gulf of Mexico continental shelf and slope","indexId":"pp814","publicationYear":"1973","noYear":false,"title":"Distribution of selected elements in surficial marine sediments of the northern Gulf of Mexico continental shelf and slope"},"lastModifiedDate":"2026-05-27T14:14:19.24246","indexId":"ofr72167","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"72-167","title":"Distribution of selected elements in surficial marine sediments of the northern Gulf of Mexico continental shelf and slope","docAbstract":"<p>Analyses for barium, beryllium, boron, calcium, cobalt, chromium, copper, iron, lanthanum, magnesium, manganese, molybdenum, niobium, nickel, lead, scandium, tin, strontium, titanium, vanadium, yttrium, zinc, and zirconium were performed on 1,304 sediment samples from the continental shelf and slope of the northern Gulf of Mexico. Approximately 40 percent of the samples were collected in two relatively small regions, one seaward of Galveston, Texas, between long. 94° and 95° W. and the other around the Dry Tortugas on the south Florida shelf. The is remaining samples represent a broad reconnaissance survey extending from the Rio Grande to the Florida Keys.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr72167","usgsCitation":"Holmes, C.W., 1972, Distribution of selected elements in surficial marine sediments of the northern Gulf of Mexico continental shelf and slope: U.S. Geological Survey Open-File Report 72-167, iv, 25, https://doi.org/10.3133/ofr72167.","productDescription":"iv, 25 p.","costCenters":[],"links":[{"id":504705,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1972/0167/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":145121,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1972/0167/report-thumb.jpg"}],"otherGeospatial":"Gulf of Mexico","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a6de4b07f02db63f478","contributors":{"authors":[{"text":"Holmes, Charles Ward","contributorId":22328,"corporation":false,"usgs":true,"family":"Holmes","given":"Charles","email":"","middleInitial":"Ward","affiliations":[],"preferred":false,"id":169011,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":16480,"text":"ofr72446 - 1972 - Interim results of geological investigations in the vicinity of the Ergani-Maden massive copper deposits near Maden, Elazig, Turkey","interactions":[],"lastModifiedDate":"2025-04-17T17:28:42.262071","indexId":"ofr72446","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"72-446","title":"Interim results of geological investigations in the vicinity of the Ergani-Maden massive copper deposits near Maden, Elazig, Turkey","docAbstract":"<p>As a result of geologic studies and geochemical reconnaissance by Griffitts, Albers, and brier in 1969 in the Ergani-Maden district of eastern Turkey, seven areas were recommended for more detailed investigation. Two of these, here termed Areas 1 and 2, were mapped geologically and sampled geochemically in June and July 1970 by .4. E. Weissenborn, U. S. Geological Survey, and Omer Oner and Metin Sengun, Mineral Research and Exploration Institute (MTA), an agency of the Turkish Government. This study was part of a mineral exploration and training project conducted by the U. S. Geological Survey in cooperation with MTA under the auspices of the Agency for International Development, U. S. Department of State. Mapping and sampling of four of the other areas was completed in August and September by Oner and Sengun, but this report concerns only Areas 1 and 2.</p><p>The geological environment in Areas 1 and 2 appears favorable for additional ore bodies of the Ergani-Maden type, which have been Turkey's most important producer of copper. Weak but distinct anomalies developed by the geochemical sampling in Area 1 adjacent to the Mihrap Dagi deposit suggest that other ore bodies maybe found along the northwesterly trend defined by the Mihrap Dagi, Arpa Meydan, Ana Yatak mines, and the Mizir Tepe prospect. Recommendations are made for 8 drill holes in Area 1 to test this possibility. </p><p>Two additional holes are also recommended in Arc.: 1. Two less pronounced anomalies were developed in Area 2. </p><p>Two drill holes are suggested to test them.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr72446","collaboration":"Mineral Research and Exploration Institute, Turkey","usgsCitation":"Weisseborn, A., Oner, O., and Sengun, M., 1972, Interim results of geological investigations in the vicinity of the Ergani-Maden massive copper deposits near Maden, Elazig, Turkey: U.S. Geological Survey Open-File Report 72-446, Report: ii, 39 p.; 6 Figures: 12.25 x 5.57 inches or smaller, https://doi.org/10.3133/ofr72446.","productDescription":"Report: ii, 39 p.; 6 Figures: 12.25 x 5.57 inches or smaller","costCenters":[],"links":[{"id":484695,"rank":7,"type":{"id":29,"text":"Figure"},"url":"https://pubs.usgs.gov/of/1972/0446/figure-12.pdf","text":"Figure 12","linkFileType":{"id":1,"text":"pdf"}},{"id":484693,"rank":5,"type":{"id":29,"text":"Figure"},"url":"https://pubs.usgs.gov/of/1972/0446/figure-10.pdf","text":"Figure 10","linkFileType":{"id":1,"text":"pdf"}},{"id":484692,"rank":4,"type":{"id":29,"text":"Figure"},"url":"https://pubs.usgs.gov/of/1972/0446/figure-9.pdf","text":"Figure 9","linkFileType":{"id":1,"text":"pdf"}},{"id":484691,"rank":3,"type":{"id":29,"text":"Figure"},"url":"https://pubs.usgs.gov/of/1972/0446/figure-8.pdf","text":"Figure 8","linkFileType":{"id":1,"text":"pdf"}},{"id":484690,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1972/0446/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":148761,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1972/0446/report-thumb.jpg"},{"id":484696,"rank":8,"type":{"id":29,"text":"Figure"},"url":"https://pubs.usgs.gov/of/1972/0446/figure-13.pdf","text":"Figure 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,{"id":8894,"text":"ofr70129 - 1972 - Distribution of copper and other metals in gully sediments of part of Okanogan County, Washington","interactions":[{"subject":{"id":8894,"text":"ofr70129 - 1972 - Distribution of copper and other metals in gully sediments of part of Okanogan County, Washington","indexId":"ofr70129","publicationYear":"1972","noYear":false,"title":"Distribution of copper and other metals in gully sediments of part of Okanogan County, Washington"},"predicate":"SUPERSEDED_BY","object":{"id":70047772,"text":"70047772 - 1972 - Distribution of copper and other metals in gully sediments of part of Okanogan County, Washington","indexId":"70047772","publicationYear":"1972","noYear":false,"title":"Distribution of copper and other metals in gully sediments of part of Okanogan County, Washington"},"id":1}],"supersededBy":{"id":70047772,"text":"70047772 - 1972 - Distribution of copper and other metals in gully sediments of part of Okanogan County, Washington","indexId":"70047772","publicationYear":"1972","noYear":false,"title":"Distribution of copper and other metals in gully sediments of part of Okanogan County, Washington"},"lastModifiedDate":"2013-08-22T14:56:56","indexId":"ofr70129","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"70-129","title":"Distribution of copper and other metals in gully sediments of part of Okanogan County, Washington","language":"ENGLISH","publisher":"Washington Department of Natural Resources","doi":"10.3133/ofr70129","usgsCitation":"Fox, K.F., and Rinehart, C.D., 1972, Distribution of copper and other metals in gully sediments of part of Okanogan County, Washington: U.S. Geological Survey Open-File Report 70-129, 60 p. ill. ;28 cm., https://doi.org/10.3133/ofr70129.","productDescription":"60 p. ill. ;28 cm.","costCenters":[],"links":[{"id":141680,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a7fe4b07f02db6486a8","contributors":{"authors":[{"text":"Fox, Kenneth F. Jr.","contributorId":82269,"corporation":false,"usgs":true,"family":"Fox","given":"Kenneth","suffix":"Jr.","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":158506,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rinehart, C. Dean","contributorId":88326,"corporation":false,"usgs":true,"family":"Rinehart","given":"C.","email":"","middleInitial":"Dean","affiliations":[],"preferred":false,"id":158507,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":59524,"text":"mf356 - 1972 - Maps showing distribution of anomalous amounts of selected elements in stream-sediment and rock samples, Eagle quadrangle, Alaska","interactions":[],"lastModifiedDate":"2016-08-22T10:37:51","indexId":"mf356","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":325,"text":"Miscellaneous Field Studies Map","code":"MF","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"356","title":"Maps showing distribution of anomalous amounts of selected elements in stream-sediment and rock samples, Eagle quadrangle, Alaska","docAbstract":"<p>Maps showing the distribution of anomalous amounts of selected elements found in more than 1,600 stream-sediment and more than 1,500 rock samples have been prepared form results of semiquantitative spectrographic analyses. The samples were collected in the Eagle quadrangle, east-central Alaska, in the summers of 1968, 1969, 1970, and 1971.</p>\n<p>Figure 1 is a map showing localities for all stream-sediment samples analyzed and indicates by symbols those containing anomalous amounts of one or more of the following elements: gold (Au), silver (Ag), arsenic (As), bismuth (Bi), copper (Cu), chromium (Cr), molybdenum (Mo), nickel (Ni), lead (Pb), antimony (Sb), tin (Sn), tungsten (W), and zinc (Zn). Figure 2 shows the localities for analyzed rock samples and indicates those containing specified amounts of the same elements as selected from the stream-sediment samples.&nbsp;</p>\n<p>Maps similar to these which showed the distribution of anomalous amounts of selected elements in stream-sediment and rock samples from the Eagle quadrangle were compiled in 1971 and issued as a U.S. Geological Survey open-file report (Foster and Yount, 1971). The maps of this report are revised from the open-file maps to include the sampling in the summer of 1971.&nbsp;</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/mf356","usgsCitation":"1972, Maps showing distribution of anomalous amounts of selected elements in stream-sediment and rock samples, Eagle quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map 356, 2 Plates: 35.50 x 22.66 inches and 34.54 x 21.94 inches, https://doi.org/10.3133/mf356.","productDescription":"2 Plates: 35.50 x 22.66 inches and 34.54 x 21.94 inches","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":184671,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/mf356.JPG"},{"id":327224,"rank":101,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/mf/0356/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":327225,"rank":102,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/mf/0356/plate-2.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":111258,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://www.dggs.dnr.state.ak.us/pubs/id/13149","linkFileType":{"id":5,"text":"html"}}],"scale":"250000","country":"United States","state":"Alaska","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -144,64 ], [ -144,65 ], [ -141,65 ], [ -141,64 ], [ -144,64 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a18e4b07f02db6051f9","contributors":{"compilers":[{"text":"Foster, Helen L.","contributorId":56195,"corporation":false,"usgs":true,"family":"Foster","given":"Helen","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":643096,"contributorType":{"id":3,"text":"Compilers"},"rank":1},{"text":"Yount, Martha E.","contributorId":173046,"corporation":false,"usgs":false,"family":"Yount","given":"Martha","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":643097,"contributorType":{"id":3,"text":"Compilers"},"rank":2}]}}
,{"id":59476,"text":"mf345 - 1972 - Geochemical, aeromagnetic, and generalized geologic maps showing distribution and abundance of molybdenum and zinc, Golconda and Iron Point quadrangles, Humboldt County, Nevada","interactions":[],"lastModifiedDate":"2016-08-22T10:30:53","indexId":"mf345","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":325,"text":"Miscellaneous Field Studies Map","code":"MF","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"345","title":"Geochemical, aeromagnetic, and generalized geologic maps showing distribution and abundance of molybdenum and zinc, Golconda and Iron Point quadrangles, Humboldt County, Nevada","docAbstract":"<p>Detailed geologic and geochemical studies of the four 7&frac12;-minute quadrangles that make up the Edna Mountain 15-minute quadrangle in Humboldt County, Nevada, were begun during the 1969 summer field season. The objectives of the project are to map the geology of this structurally complex area at 1:24,000 scale and to determine the regional distribution and abundance of metals in rocks of the area and the factors that control the distribution and abundance of those metals. Tungsten-bearing hot-spring tufa, metalliferous black shale in Ordovician rocks, base-metal and barite deposits in Paleozoic sedimentary rocks, and copper-molybdenum in granodiorite pultons of Cretaceous age occur in the Edna Mountain area. None of these deposits have been of much economic significance, although tungsten was mined for the hot-spring deposits during World War II.</p>\n<p>The numerous occurrences of mineralized ground, however, along with the broad spectrum of types of mineralization, intensity of alteration, structural complexity, and abundance of intermediate to silicic igneous intrusive rocks suggest that concealed or heretofore unrecognized mineral deposits may exist in the area. Integrated geologic, geochemical, and geophysical studies on a district-wide scale might improve our understanding of the factors that control the distribution, methods of emplacement, and spatial and genetic relationships (if any) of these different types of deposits. We hope that broad target areas or guidelines for mineral exploration in this area may be identified.&nbsp;</p>\n<p>This series of maps shows the distribution and abundance of mercury, arsenic, antimony, tungsten, gold, copper, lead, and silver related to a geologic and aeromagnetic base in the Golconda and Iron Point&nbsp;7&frac12;-minute quadrangles. All samples are rock samples; most are from shear or fault zones, fractures, jasperoid, breccia reefs, and altered rocks. All the samples were prepared and analyzed in truck-mounted laboratories at Winnemucca, Nevada. Arsenic, tungsten, copper, lead, and silver were determined by semiquantitative spectrographic methods by D.F. Siems and E.F. Cooley. Mercury and gold were determined by atomic absorption methods and antimony was determined by wet chemical methods by R.M. O'Leary, M.S. Erickson, and others.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/mf345","usgsCitation":"Erickson, R.L., and Marsh, S., 1972, Geochemical, aeromagnetic, and generalized geologic maps showing distribution and abundance of molybdenum and zinc, Golconda and Iron Point quadrangles, Humboldt County, Nevada: U.S. Geological Survey Miscellaneous Field Studies Map 345, 2 Plates: 31.80 x 22.03 inches and 31.67 x 21.77 inches, https://doi.org/10.3133/mf345.","productDescription":"2 Plates: 31.80 x 22.03 inches and 31.67 x 21.77 inches","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":180175,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/mf345.PNG"},{"id":327215,"rank":1,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/mf/0345/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":327216,"rank":2,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/mf/0345/plate-2.pdf","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Nevada","county":"Humboldt County","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -117.5,40.8675 ], [ -117.5,41 ], [ -117.25,41 ], [ -117.25,40.8675 ], [ -117.5,40.8675 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b1fe4b07f02db6ab81a","contributors":{"authors":[{"text":"Erickson, R. L.","contributorId":26318,"corporation":false,"usgs":true,"family":"Erickson","given":"R.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":262084,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Marsh, S.P.","contributorId":32913,"corporation":false,"usgs":true,"family":"Marsh","given":"S.P.","email":"","affiliations":[],"preferred":false,"id":262085,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":58353,"text":"mf323 - 1972 - Distribution of lead and copper in surface sediments in San Francisco Bay estuary, California","interactions":[],"lastModifiedDate":"2024-01-16T19:49:14.021287","indexId":"mf323","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":325,"text":"Miscellaneous Field Studies Map","code":"MF","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"323","title":"Distribution of lead and copper in surface sediments in San Francisco Bay estuary, California","docAbstract":"<p>No abstract available.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/mf323","usgsCitation":"Peterson, D.H., McCulloch, D.S., Conomos, T.J., and Carlson, P., 1972, Distribution of lead and copper in surface sediments in San Francisco Bay estuary, California: U.S. Geological Survey Miscellaneous Field Studies Map 323, 1 Plate: 35.08 x 22.30 inches, https://doi.org/10.3133/mf323.","productDescription":"1 Plate: 35.08 x 22.30 inches","costCenters":[],"links":[{"id":424443,"rank":3,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_2746.htm","linkFileType":{"id":5,"text":"html"}},{"id":183977,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":266361,"rank":2,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/mf/0323/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}}],"scale":"80000","country":"United States","state":"California","otherGeospatial":"San Francisco Estuary","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -122.5,37.416666666666664 ], [ -122.5,38.25 ], [ -121.75,38.25 ], [ -121.75,37.416666666666664 ], [ -122.5,37.416666666666664 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a6fe4b07f02db6409dc","contributors":{"authors":[{"text":"Peterson, D. H.","contributorId":92229,"corporation":false,"usgs":true,"family":"Peterson","given":"D.","middleInitial":"H.","affiliations":[],"preferred":false,"id":258848,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McCulloch, D. S.","contributorId":78315,"corporation":false,"usgs":true,"family":"McCulloch","given":"D.","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":892470,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Conomos, T. J.","contributorId":77515,"corporation":false,"usgs":true,"family":"Conomos","given":"T.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":892471,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Carlson, P.R.","contributorId":97055,"corporation":false,"usgs":true,"family":"Carlson","given":"P.R.","email":"","affiliations":[],"preferred":false,"id":892472,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":14396,"text":"ofr72204 - 1972 - Reconnaissance geology of the Jabal Bitran quadrangle, Kingdom of Saudi Arabia","interactions":[],"lastModifiedDate":"2012-02-02T00:07:08","indexId":"ofr72204","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"72-204","title":"Reconnaissance geology of the Jabal Bitran quadrangle, Kingdom of Saudi Arabia","docAbstract":"The Jabal Bitten quadrangle covers an area of 2833 sq km in the \r\neastern part of the Precambrian Shield in Saudi Arabia. The rocks in \r\nthe quadrangle are divided geographically alone arcuate north-trending \r\nlines into an eastern area of granite intruded by a swarm of dikes of \r\nrhyolite and andesite, and a western area of dominantly pelitic \r\nchlorite-sericite schist, separated by the narrow central complex of \r\nthe Idsas Range. This complex is composed of pyroclastic rocks, lava, \r\nconglomerate, marble, and plutonic mafic rocks that have been intricately modified by episodes of metamorphism, igneous intrusion, and \r\nfaulting. The Idsas Range contains ancient gold and copper mines, \r\nand deposits of magnetite, copper, asbestos, and chromite. \r\n\r\nThe rocks in the Jabal Bitten quadrangle are here interpreted to \r\nconsist of three major sedimentary and volcanic groups, the lowermost \r\nof which was deposited unconformably on hornblende-biotite granite \r\ngneiss, and all of which are intruded by granite dikes and plutons. \r\nFrom oldest to youngest the layered rocks are called Halaban Group, \r\nBi'r Khountina Group, and Murdama Group, A biotite-hornblende granite \r\nis older than uppermost Bi'r Khountina, and peralkalic granite is \r\nyounger than Murdama. \r\n\r\nThe layered rocks of these groups are generally metamorphosed to \r\nthe greenschist facies. The metamorphic grade rises abruptly at the \r\nIdsas Range to the albite-epidote-amphibolite facies and lower subfacies of the amphibolite facies in parts of the Halaban Group; some \r\nskarn east of the range may be in the upper part of the amphibolite \r\nfacies. Characteristically, the Halaban Group has the highest grade \r\nand the greatest range in metamorphic grade, and the Murdama Group \r\nhas the lowest but most uniformly developed metamorphic grade. The \r\nmetamorphism of the rocks was caused by three successive pulses of \r\nregional dynamothermal metamorphism plus contact metamorphism around \r\nthe younger bodies of plutonic igneous rocks. \r\n\r\nFour major structural elements of the quadrangle are reflected \r\nin the geography and geologic units. These are a mantled gneiss dome \r\non the east separated from a north-plunging synclinorium in rocks of the Murdama and Bi?r Khountina Groups on the west by a narrow dejective zone of the Halaban and lower Bi?r Khountina. The dejective zone is much modified by impricate overthrusts and accompanying tear faults. These major faults have pushed elements of the Halaban and Bi?r Khountina westward over Bi?r Khountina and Murdama, with the result that very complex fault patterns have evolved.\r\n\r\nOpen geochemical reconnaissance of the area disclosed one positive anomaly for nickel and 40 threshold indications of several elements, principally nickel, chromium, copper, and tungsten. Heavy-mineral and radiometric reconnaissance showed 18 areas containing scheelite and/or powellite and four areas of anomalous radioactivity. Most of these features are in the dejective zone, as are five of the nine ancient workings, the massive and disseminated magnetite, most of the secondary copper minerals, and the traces of asbestos, magnesite, and chromite known in the quadrangle. The mantled gneiss dome and a complex of gabbro and amphibolite on its southwestern flank are the next most mineralized areas. Scant evidence of mineralization is present in the Murdama Group west of the dejective zone.\r\n\r\nMagnetite deposits at Jabal Idsas have the greatest potential of the mineral deposits in the Jabal Bitran quadrangle. Further study of gold at Fawara and Selib mines is recommended, as is investigation of a positive nickel anomaly that shows threshold cobalt and above background radioactivity. The garnetiferous skarn in the east-central part of the quadrangle should be examined for composition and abrasive character of the garnet and for the remote possibility of tungsten in scheelite and beryllium in helvite.","language":"ENGLISH","publisher":"U.S. Geological Survey],","doi":"10.3133/ofr72204","usgsCitation":"Kahr, V.P., Overstreet, W., Whitlow, J.W., and Ankary, A., 1972, Reconnaissance geology of the Jabal Bitran quadrangle, Kingdom of Saudi Arabia: U.S. Geological Survey Open-File Report 72-204, iii, 70 leaves :ill. (some col.), folded map ;28 cm.; 1 sheet, https://doi.org/10.3133/ofr72204.","productDescription":"iii, 70 leaves :ill. (some col.), folded map ;28 cm.; 1 sheet","costCenters":[],"links":[{"id":148300,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1972/0204/report-thumb.jpg"},{"id":43074,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1972/0204/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":43075,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1972/0204/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a6fe4b07f02db640a14","contributors":{"authors":[{"text":"Kahr, Viktor P.","contributorId":99569,"corporation":false,"usgs":true,"family":"Kahr","given":"Viktor","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":169385,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Overstreet, W.C.","contributorId":105294,"corporation":false,"usgs":true,"family":"Overstreet","given":"W.C.","email":"","affiliations":[],"preferred":false,"id":169386,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Whitlow, J. W.","contributorId":63810,"corporation":false,"usgs":true,"family":"Whitlow","given":"J.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":169383,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Ankary, A.O.","contributorId":74016,"corporation":false,"usgs":true,"family":"Ankary","given":"A.O.","affiliations":[],"preferred":false,"id":169384,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":14383,"text":"ofr72200 - 1972 - Geochemistry of selected areas in the southern Black Hills, Fall River County, South Dakota","interactions":[],"lastModifiedDate":"2024-03-01T21:57:54.960363","indexId":"ofr72200","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"72-200","title":"Geochemistry of selected areas in the southern Black Hills, Fall River County, South Dakota","docAbstract":"<p>Geologic and radiometric studies and chemical analyses of soils, rocks, and water were made north of an area between Edgemont and Hot Springs, South Dakota.</p><p>The soil is shallow, poorly developed, and not present in some areas. The median pH of the soil from three areas ranges from 6.7 to 7.0. Rocks are more alkaline and have a median pH from several areas of 7.3 to 8.9 and some mineralized rocks have a pH of 9.4.</p><p>The pH of shallow perched high-radon bearing waters varies from 3.5 to 6.8 as contrasted to deeply originating low-radon bearing thermal waters with very small ranges of from 6.9 to 7.0.</p><p>Sediments are oxidized down to the perched water table, a depth of more than 50 feet below the surface of the ground. The uranium deposits are mostly in this zone of oxidation and are characterized by the minerals carnotite and tyuyamunite. In the oxidized zone sandstones are most commonly colored a very pale orange in contrast to the underlying yellowish gray colored sandstones. Mudstones, in the oxidized zone, are most commonly colored a grayish orange in contrast to the underlying olive gray colored mudstones. The characteristic mineral in the oxidized zone is hematite, and below, pyrite.</p><p>Sediments in the oxidized zone contain not only less iron and uranium than do the underlying sediments but also the joints and contacts between strata in this oxidized zone contain relative large amounts of arsenic, barium, calcium, chromium, cobalt, copper, manganese, nickel, vanadium, and zinc.</p><p>No pattern was apparent in the size and position of mineralized zones with respect to ground water levels: Highly uraniferous beds occurred above, at, and below the uppermost perched water levels.</p><p>Gamma ray logs were made of 43 drill holes that totalled about 4,300 feet. The number and intensity of radioactivity peaks was a function of increasing grain size in the sediments. About 60 percent of the gamma ray radioactivity peaks occurred within beds rather than at their contacts. Contacts between coarser-grained beds contained a higher incidence of radioactivity peaks than contacts between finer-grained beds. Between beds of dissimilar lithology such as between mudstones and sandstones or very fine-grained sandstones and medium-grained sandstones, the coarser the bed at the contact in relation to the other bed at the contact the greater the chance for a radioactivity peak. An apparently impermeable bed above or below a contact seemed to have little influence on the number and magnitude of radioactivity peaks. Over 70 percent of the radioactivity peaks occurred, not as isolated peaks, but in groups containing from two to ten peaks. Most of these groups were in sandstones rather than in mudstones. The average vertical range of each group of radioactivity peaks is 15 feet, and for isolated peaks, one foot.</p><p>Radiometric anomalies apparently are not detected by hand-carried scintillometers unless there is a subsurface anomaly greater than about 1,000 counts per second within a few feet of the surface of the ground. Larger radioactivity anomalies occurred in the higher sloping areas. The chances for uranium anomalies in soil were best where the soil was underlain by an uraniferous coarse non-calcareous sandstone which was intersected by joint or faults.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr72200","usgsCitation":"Jones, R.S., 1972, Geochemistry of selected areas in the southern Black Hills, Fall River County, South Dakota: U.S. Geological Survey Open-File Report 72-200, Report: vi, 124 p.; 13 Plates: 19.57 x 23.68 inches or smaller; 4 Figures: 25.12 x 31.01 inches or smaller; 14 Tables: 29.91 x 7.73 inches or smaller, https://doi.org/10.3133/ofr72200.","productDescription":"Report: vi, 124 p.; 13 Plates: 19.57 x 23.68 inches or smaller; 4 Figures: 25.12 x 31.01 inches or smaller; 14 Tables: 29.91 x 7.73 inches or smaller","costCenters":[],"links":[{"id":426212,"rank":33,"type":{"id":27,"text":"Table"},"url":"https://pubs.usgs.gov/of/1972/0200/Table-19.pdf","text":"Table 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10","linkFileType":{"id":1,"text":"pdf"}},{"id":426203,"rank":24,"type":{"id":27,"text":"Table"},"url":"https://pubs.usgs.gov/of/1972/0200/Table-9.pdf","text":"Table 9","linkFileType":{"id":1,"text":"pdf"}},{"id":426202,"rank":23,"type":{"id":27,"text":"Table"},"url":"https://pubs.usgs.gov/of/1972/0200/Table-7.pdf","text":"Table 7","linkFileType":{"id":1,"text":"pdf"}},{"id":426201,"rank":22,"type":{"id":27,"text":"Table"},"url":"https://pubs.usgs.gov/of/1972/0200/Table-6.pdf","text":"Table 6","linkFileType":{"id":1,"text":"pdf"}},{"id":426200,"rank":21,"type":{"id":27,"text":"Table"},"url":"https://pubs.usgs.gov/of/1972/0200/Table-3.pdf","text":"Table 3","linkFileType":{"id":1,"text":"pdf"}},{"id":426199,"rank":20,"type":{"id":27,"text":"Table"},"url":"https://pubs.usgs.gov/of/1972/0200/Table-2.pdf","text":"Table 2","linkFileType":{"id":1,"text":"pdf"}},{"id":426198,"rank":19,"type":{"id":29,"text":"Figure"},"url":"https://pubs.usgs.gov/of/1972/0200/figure-4.pdf","text":"Figure 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2","linkFileType":{"id":1,"text":"pdf"}},{"id":426211,"rank":32,"type":{"id":27,"text":"Table"},"url":"https://pubs.usgs.gov/of/1972/0200/Table-18.pdf","text":"Table 18","linkFileType":{"id":1,"text":"pdf"}},{"id":426208,"rank":29,"type":{"id":27,"text":"Table"},"url":"https://pubs.usgs.gov/of/1972/0200/Table-16.pdf","text":"Table 16","linkFileType":{"id":1,"text":"pdf"}},{"id":426207,"rank":28,"type":{"id":27,"text":"Table"},"url":"https://pubs.usgs.gov/of/1972/0200/Table-15.pdf","text":"Table 15","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"South Dakota","county":"Fall River County","city":"Edgemont, Hot Springs","otherGeospatial":"Southern Black Hills","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -103.99753355026218,\n              43.56489888675918\n            ],\n            [\n              -103.99753355026218,\n              43.17082037367584\n            ],\n            [\n              -103.27516999591582,\n              43.17082037367584\n            ],\n            [\n              -103.27516999591582,\n              43.56489888675918\n            ],\n            [\n              -103.99753355026218,\n              43.56489888675918\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b1ee4b07f02db6aa6e1","contributors":{"authors":[{"text":"Jones, Robert Sprague","contributorId":41814,"corporation":false,"usgs":true,"family":"Jones","given":"Robert","email":"","middleInitial":"Sprague","affiliations":[],"preferred":false,"id":169365,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":14348,"text":"ofr72195 - 1972 - Mineral deposits of the northwestern Hijaz quadrangle, Kingdom of Saudi Arabia","interactions":[],"lastModifiedDate":"2024-04-02T21:09:30.652159","indexId":"ofr72195","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"72-195","title":"Mineral deposits of the northwestern Hijaz quadrangle, Kingdom of Saudi Arabia","docAbstract":"<p>A reconnaissance of portions of the Northwestern Hijaz quadrangle in the Kingdom of Saudi Arabia was made during 1964 and 1965 as part of a mineral survey of the Precambrian crystalline rocks of the country. The survey is being made under the terms of an agreement between the Saudi Arabia Ministry of Petroleum and Mineral Resources and the United States Geological Survey. Ancient gold and copper mines occur in the area, and deposits of iron minerals, chromite, copper minerals, asbestos, magnesite, gypsum, and glass sand have been discovered in recent years.</p><p>The land surface of the quadrangle consists of a narrow coastal plain, a mountainous belt, and a plateau. The mountainous bolt is made up of Precambrian rocks that include three major stratigraphic units separated by unconformities. The two older units are slightly metamorphosed and are intruded by plutonic rocks of many kinds. Granitic rocks predominate but intrusions of syenite, diorite, gabbro, and peridotite are known. Dikes are abundant throughout the mountainous area. The Precambrian rocks have been folded on north- to northwest-trending axes. A major northwest-striking wrench fault zone crosses the central portion of the quadrangle. North-, northeast-, and east-trending faults are locally prominent.</p><p>The plateau lies in the northeastern part of the quadrangle. It is made up of unmetamorphosed gently dipping sandstone of Paleozoic age overlain in part by flood basalts of Tertiary to Quaternary age. Sedimentary rocks of Miocene(?) age crop out in the coastal area.</p><p>Gold was mined in the area during the eighth and ninth centuries A. D. The ancient gold mines were reexamined in the 1930s but wore found to be too small and too low grade for mining. Exploration for minerals other than gold began in 1950.</p><p>The present work consisted of the examination of geological features that are potentially favorable for the presence of mineral deposits such as intrusive contacts, fault zones, quartz veins, and hydrothermally altered areas. Samples of wadi sediment were collected in areas that appeared most favorable. The samples were analyzed spectrographically for trace amounts of 27 elements to confirm the presence or absence of mineralization.</p><p>Massive magnetite bodies that range in size from a few hundred to a few thousand tons wore discovered in the course of the work as well as widely scattered traces of secondary copper minerals. The wadi samples disclosed several areas that contain from 5 to 10 times the average trace amounts of base metals and molybdenum; these areas should be prospected in more detail.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr72195","usgsCitation":"Johnson, R.F., and Trent, V.A., 1972, Mineral deposits of the northwestern Hijaz quadrangle, Kingdom of Saudi Arabia: U.S. Geological Survey Open-File Report 72-195, Report: 42 p.; 1 Figure: 40.89 x 40.24 inches; 1 Table: xiii, 11.64 x 7.75 inches, https://doi.org/10.3133/ofr72195.","productDescription":"Report: 42 p.; 1 Figure: 40.89 x 40.24 inches; 1 Table: xiii, 11.64 x 7.75 inches","costCenters":[],"links":[{"id":427322,"rank":3,"type":{"id":29,"text":"Figure"},"url":"https://pubs.usgs.gov/of/1972/0195/figure-1.pdf","text":"Figure 1","linkFileType":{"id":1,"text":"pdf"}},{"id":427321,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1972/0195/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":427323,"rank":4,"type":{"id":27,"text":"Table"},"url":"https://pubs.usgs.gov/of/1972/0195/table-1.pdf","text":"Table 1","linkFileType":{"id":1,"text":"pdf"}},{"id":148340,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1972/0195/report-thumb.jpg"}],"scale":"500000","country":"Saudi Arabia","otherGeospatial":"Hijaz quadrangle","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              35,\n              28\n            ],\n            [\n              35,\n              24\n            ],\n            [\n              39,\n              24\n            ],\n            [\n              39,\n              28\n            ],\n            [\n              35,\n              28\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","publicComments":"SA(IR) 80","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a61e4b07f02db6359e9","contributors":{"authors":[{"text":"Johnson, Robert Francis","contributorId":8864,"corporation":false,"usgs":true,"family":"Johnson","given":"Robert","email":"","middleInitial":"Francis","affiliations":[],"preferred":false,"id":169301,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Trent, Virgil A.","contributorId":47381,"corporation":false,"usgs":true,"family":"Trent","given":"Virgil","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":169302,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":13429,"text":"ofr7298 - 1972 - Sampling of copper-bearing Keweenawan rocks of northwestern Wisconsin","interactions":[],"lastModifiedDate":"2012-02-02T00:06:45","indexId":"ofr7298","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"72-98","title":"Sampling of copper-bearing Keweenawan rocks of northwestern Wisconsin","docAbstract":"Metallic copper or copper minerals are locally present, in flows, conglomerate, siltstone, and shale of Keweenawan age that underlie about 3,000 square miles of northwestern Wisconsin. Representative samples taken from 24 of the reported occurrences in lava or conglomerate contain 0.0075 to 0.69 percent copper; 10 of them have more than 0.10 percent. No study was made to appraise the geologic Settings of the sampled sites as guides to possibly more significantly mineralized rock. The siltstone and shale sequence is sparingly exposed in Wisconsin but was not sampled; exploratory drilling has shown that it is mineralized locally.","language":"ENGLISH","publisher":"U.S. Geological Survey],","doi":"10.3133/ofr7298","usgsCitation":"Dutton, C.E., 1972, Sampling of copper-bearing Keweenawan rocks of northwestern Wisconsin: U.S. Geological Survey Open-File Report 72-98, 30 leaves :folded map ;29 cm., https://doi.org/10.3133/ofr7298.","productDescription":"30 leaves :folded map ;29 cm.","costCenters":[],"links":[{"id":145129,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1972/0098/report-thumb.jpg"},{"id":41872,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1972/0098/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":41873,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1972/0098/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a0ee4b07f02db5fddd9","contributors":{"authors":[{"text":"Dutton, Carl E.","contributorId":27418,"corporation":false,"usgs":true,"family":"Dutton","given":"Carl","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":167795,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":12432,"text":"ofr724 - 1972 - A geochemical study of the Rio Pantanos area, Department of Antioquia, Colombia preliminary report","interactions":[],"lastModifiedDate":"2012-02-02T00:06:33","indexId":"ofr724","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"72-4","title":"A geochemical study of the Rio Pantanos area, Department of Antioquia, Colombia preliminary report","docAbstract":"Geochemical sampling in the Western Cordillera has delineated an 18 km 2 area anomalous in copper, molybdenum, and silver. Highly anomalous metal contents are found in stream sediment, soil, and outcrop samples collected within this area. The area is underlain by intrusive granodiorite to quartz diorite that has porphyritic and granitoid phases. Most of the outcrop samples contain disseminated pyrite, chalcopyrite, and bornite. \r\n\r\nA geochemical reconnaissance sampling program in the Western Cordillera, formulated by Andros Jimeno V., Director, Instituto National de Investigaciones Geologico-Mineras (INGEOMINAS), and Earl M. Irving, U. S. Geological Survey (USGS) Chief of Party in Colombia, was carried out from 1969 to 1971 by geologists of the INGEOMINAS office in Medellin. This work was part of a cooperative program of INGEOMINAS and the USGS sponsored by the Government of Colombia and the Agency for International Development, U. S. Department of State. \r\n\r\nSeventeen generally east-trending traverses were completed across the Western Cordillera. These traverses, generally paralleling major drainages, cross the range at intervals of 10 to 30 km.","language":"ENGLISH","publisher":"U.S. Geological Survey],","doi":"10.3133/ofr724","usgsCitation":"Alminas, H.V., and Mosier, E.L., 1972, A geochemical study of the Rio Pantanos area, Department of Antioquia, Colombia preliminary report: U.S. Geological Survey Open-File Report 72-4, iv, 34 leaves :ill., maps ;28 cm., https://doi.org/10.3133/ofr724.","productDescription":"iv, 34 leaves :ill., maps ;28 cm.","costCenters":[],"links":[{"id":144878,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1972/0004/report-thumb.jpg"},{"id":40672,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1972/0004/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":40673,"rank":401,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1972/0004/plate-2.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":40674,"rank":402,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1972/0004/plate-3.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":40675,"rank":403,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1972/0004/plate-4.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":40676,"rank":404,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1972/0004/plate-5.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":40677,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1972/0004/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b24e4b07f02db6ae6db","contributors":{"authors":[{"text":"Alminas, Henry V.","contributorId":59783,"corporation":false,"usgs":true,"family":"Alminas","given":"Henry","email":"","middleInitial":"V.","affiliations":[],"preferred":false,"id":166127,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mosier, Elwin L.","contributorId":70374,"corporation":false,"usgs":true,"family":"Mosier","given":"Elwin","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":166128,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":23653,"text":"ofr72215 - 1972 - Floods in the summer of 1971 in south-central Alaska","interactions":[],"lastModifiedDate":"2023-12-22T17:06:18.355506","indexId":"ofr72215","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"72-215","title":"Floods in the summer of 1971 in south-central Alaska","docAbstract":"<p>Floods and high water occurred throughout the summer of 1971 in south-central Alaska. Snow cover, 150 percent of average, in the mountains on May 1 caused local snowmelt floods from mid-May to mid-July. The peak discharge of 265,000 cfs (cubic feet per second) on July 15 at Copper River near Chitina was the highest in 22 years of record.</p><p>However, the major flood period was August 8-11. Precipitation totals of 3 to 9 inches during August 5-11 were recorded in an area extending northeastward from Iliamna Lake to Palmer, Talkeetna, and Paxson Lake. The principal flood areas were the upper Copper, Matanuska, Susitna, Chakachatna, and Kvichak River basins. Flooding in the Anchorage area was not severe. Total damage caused by the August flood is estimated to be 8 to 10 million dollars of which 6 million dollars occurred in the Matanuska Valley.</p><p>Extreme floods occurred in the Matanuska Valley. A lake near Sutton on an unnamed tributary to Granite Creek breached its embankment, which released a peak discharge in Granite Creek on August 10 of 58,600 cfs, 23.4 times the probable 50-year flood. Other streams near Sutton, tributary to the Matanuska River, had peak discharges 1.8 to 8.9 times the probable 50-year flood. The Matanuska River at Palmer had a peak discharge of 82,100 cfs, 1.2 times the probable 50-year flood. Downstream near Bodenburg Butte, an area was inundated when the Matanuska River overtopped a dike. Another extreme flood occurred at the Chakachatna River near Tyonek on August 11 where the peak discharge was estimated to be 470,000 cfs. The peak was caused by lateral erosion of a channel constriction formed by Barrier Glacier at the outlet of Chakachamna Lake.</p><p>Hydrologic data for planning, discussions of antecedent conditions, and meteorology along with a description of the floods and flood damage are included. Tables of storm precipitation, peak discharge data, sediment data, and discharge for the June-August period are also included.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr72215","usgsCitation":"Lamke, R.D., 1972, Floods in the summer of 1971 in south-central Alaska: U.S. Geological Survey Open-File Report 72-215, 88 p., https://doi.org/10.3133/ofr72215.","productDescription":"88 p.","costCenters":[],"links":[{"id":156164,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1972/0215/report-thumb.jpg"},{"id":423801,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1972/0215/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Alaska","otherGeospatial":"south-central 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,{"id":70205796,"text":"70205796 - 1972 - Massive sulfide copper deposits of the Ergani-Maden area, Southeastern Turkey","interactions":[],"lastModifiedDate":"2019-10-03T13:20:37","indexId":"70205796","displayToPublicDate":"1972-10-03T13:15:30","publicationYear":"1972","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1472,"text":"Economic Geology","active":true,"publicationSubtype":{"id":10}},"title":"Massive sulfide copper deposits of the Ergani-Maden area, Southeastern Turkey","docAbstract":"<p>The copper deposits of the Ergani-Maden area, in the Taurus Mountains of southeastern Turkey, have been a major source of copper for more than 4,000 years. The area is underlain by gently dipping mudstones interlayered with mafic volcanic rocks and lenticular beds of limestone, mainly of Eocene age. The layered rocks were intruded and slightly metamorphosed by large masses of gabbro and related mafic rocks that are now largely serpentinized. The copper deposits are in an east-trending belt about 20 km long, near the center of which is the town of Maden. A broad geochemical anomaly extends north-northwest and south-southeast from this belt, its axis passing near Maden. Near the mines the main igneous mass has a gently dipping roof and steep sides. Around and south of Maden, where the mass has barely been unroofed, are many roof pendants and remnants of sedimentary and volcanic material. One of these contains the largest mine in the area--the Ana Yatak. The largest deposit, the Aria Yatak ore body, occurs in a canoe-shaped pendant of mudstone that occupies atrough about 1 km long and 1/2 km wide in the top of the intrusive. The present vertical extent is about 170 meters. In the central and western parts of the trough the mudstone is chloritized and partly replaced by ore minerals. The main ore body is about 550 X 300 X 50 m in maximum dimensions. It consists mainly of pyrite and chalcopyrite, and locally it contains abundant magnetite or pyrrhotite. The gangue consists predominantly of chlorite, smaller amounts of quartz, and very minor amounts of calcite and barite. The massive sulfide ore body is underlain by \"impregnation ore\" in which veinlets and irregular small masses of sulfides are embedded in chloritized mudstone. A zone rich in supergene chalcocite, corellite, and bornite lies between the sulfide mass and the well-developed gossan in many places, and this was extensively mined in ancient times. The Mihrap Dagi mine, about 1 km northwest of the Aria Yatak deposit, is also near a contact between the intrusive and the sedimentary rock. It too contains a massive sulfide ore body accompanied by chloritized rock, but it contains little \"impregnation ore.\" In the Ergani-Maden area, ore deposition followed a long history of sedimentation, lithification, faulting, intrusion of mafic igneous rocks, serpentinization, and further faulting, and was part of a broad-scale introduction of metal into the sedimentary, extrusive, and intrusive rocks. Thus it is epigenetic. The major ore bodies are fracturecontrolled replacement masses. Adularia which occurs in veins a few hundred meters south of the main sulfide ore bodies is inferred to have formed contemporaneously with the sulfide and shows a potassium-argon age of 31.5 +/- 0.8 m.y. If this inference is correcthe deposits formed during middle Oligocene or slightly later. </p>","language":"English","publisher":" Economic Geology Publishing Company","doi":"10.2113/gsecongeo.67.6.701","issn":" 0361-0128","usgsCitation":"Griffitts, W., Albers, J.P., and Oener, O., 1972, Massive sulfide copper deposits of the Ergani-Maden area, Southeastern Turkey: Economic Geology, v. 67, no. 6, p. 701-716, https://doi.org/10.2113/gsecongeo.67.6.701.","productDescription":"16 p.","startPage":"701","endPage":"716","costCenters":[],"links":[{"id":367972,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Turkey","otherGeospatial":"Ergani-Maden ","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              39.364013671875,\n              38.09998264736481\n            ],\n            [\n              40.36376953125,\n              38.09998264736481\n            ],\n            [\n              40.36376953125,\n              38.74551518488265\n            ],\n            [\n              39.364013671875,\n              38.74551518488265\n            ],\n            [\n              39.364013671875,\n              38.09998264736481\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"67","issue":"6","noUsgsAuthors":false,"publicationDate":"1972-10-01","publicationStatus":"PW","contributors":{"authors":[{"text":"Griffitts, W. R.","contributorId":116293,"corporation":false,"usgs":true,"family":"Griffitts","given":"W. R.","affiliations":[],"preferred":false,"id":772381,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Albers, J. P.","contributorId":81505,"corporation":false,"usgs":true,"family":"Albers","given":"J.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":772382,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Oener, Oemer","contributorId":219495,"corporation":false,"usgs":false,"family":"Oener","given":"Oemer","email":"","affiliations":[],"preferred":false,"id":772383,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70206714,"text":"70206714 - 1972 - Borehole activation analysis by delayed and capture gamma rays using a 252Cf neutron source","interactions":[],"lastModifiedDate":"2019-11-18T14:25:13","indexId":"70206714","displayToPublicDate":"1972-01-08T14:19:50","publicationYear":"1972","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1472,"text":"Economic Geology","active":true,"publicationSubtype":{"id":10}},"title":"Borehole activation analysis by delayed and capture gamma rays using a 252Cf neutron source","docAbstract":"<p><span>Theoretical analysis and experimental comparison of the radiative capture and delayed gamma-ray activation techniques indicate the latter to be more efficient for the detection of copper, whereas the radiative capture method is preferable for nickel. A conservative lower detection limit for both copper and nickel is '-0.5%. Borehole spectra by both techniques were made in a copper- and nickel-bearing gabbro, utilizing a Ge(Li) propane-cooled detector. Al, Mn, Na, Mg, Cu, and V were readily activated and detected by the delayed method. H, Fe, Si, and Ni were not usually present in the delayed spectra but they responded well in the capture mode. It is shown that the borehole sonde can be configured to permit simultaneous delayed and capture spectra, permitting detection of all of these elements. Simulated borehole experiments indicate that, in the delayed gamma-ray mode, an infinite sample is achieved when the ore layer has a vertical thickness of ∼20 cm and a horizontal distance of '10 cm into the wallrock. The depth resolution is thus relatively good but horizontal penetration through the wallrock is limited. © 1972 Society of Economic Geologists, Inc.</span></p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.2113/gsecongeo.67.5.579","issn":"03610128","usgsCitation":"Moxham, R., Senftle, F.E., and Boynton, G.R., 1972, Borehole activation analysis by delayed and capture gamma rays using a 252Cf neutron source: Economic Geology, v. 67, no. 5, p. 579-591, https://doi.org/10.2113/gsecongeo.67.5.579.","productDescription":"13 p.","startPage":"579","endPage":"591","costCenters":[],"links":[{"id":369297,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"67","issue":"5","noUsgsAuthors":false,"publicationDate":"1972-08-01","publicationStatus":"PW","contributors":{"authors":[{"text":"Moxham, R.M.","contributorId":42234,"corporation":false,"usgs":true,"family":"Moxham","given":"R.M.","email":"","affiliations":[],"preferred":false,"id":775521,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Senftle, F. E.","contributorId":47788,"corporation":false,"usgs":true,"family":"Senftle","given":"F.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":775522,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Boynton, G. R.","contributorId":82276,"corporation":false,"usgs":true,"family":"Boynton","given":"G.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":775523,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":17610,"text":"ofr72325 - 1972 - Reconnaissance geologic map of the Solomon D-6 quadrangle, Seward Peninsula, Alaska","interactions":[],"lastModifiedDate":"2022-08-11T13:04:59.96683","indexId":"ofr72325","displayToPublicDate":"1972-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"72-325","title":"Reconnaissance geologic map of the Solomon D-6 quadrangle, Seward Peninsula, Alaska","docAbstract":"<p>The Solomon D-6 15- by 30-minute quadrangle lies 20 miles northeast of Nome, Alaska, and adjoins on the east the Nome D-l quadrangle mapped by Hummel (1962b) and on the west the Solomon D-5 quadrangle mapped by Smith (1910).</p><p>Placer gold has been produced from Iron Creek and many of its tributaries, and a small amount of copper was shipped from the Wheeler mine. Many lode prospects contain small amounts of copper in silicified limestone within and near the base of thrust plates of carbonate rocks. Other lodes consist of well-defined veins containing gold and base-metal sulfide minerals, but none has been commercially productive.</p><p>Mapped rock units include the \"York Slate,\" of Precambrian age, which consists of a highly deformed and thick sequence of graphitic calcareous siltite, which contains thin limestone beds and intercalated(?) volcaniclastic rocks, and Paleozoic carbonate rocks, which have been converted largely to marble and schistose marble. Along and near the Kigluaik Mountains in the north part of the quadrangle, quartzo-feldspathic gneisses of Precambrian age are intruded by fine-grained granite. A very thick sequence of schistose thin-bedded argillaceous and dolomitic limestone overlies the York Slate and is correlative with a similar rock originally mapped in the York Mountains.</p><p>Surficial deposits, consisting principally of moraine and stream-reworked moraine, mantle large parts of the quadrangle.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr72325","usgsCitation":"Sainsbury, C., Hudson, T., Ewing, R., and Richards, T., 1972, Reconnaissance geologic map of the Solomon D-6 quadrangle, Seward Peninsula, Alaska: U.S. Geological Survey Open-File Report 72-325, Report: 17 p.; 1 Plate: 17.71 x 22.79 inches, https://doi.org/10.3133/ofr72325.","productDescription":"Report: 17 p.; 1 Plate: 17.71 x 22.79 inches","costCenters":[],"links":[{"id":150582,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1972/0325/report-thumb.jpg"},{"id":46804,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1972/0325/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":46805,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1972/0325/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":404229,"rank":2,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_113150.htm","linkFileType":{"id":5,"text":"html"}}],"scale":"63360","country":"United States","state":"Alaska","otherGeospatial":"Seward Peninsula, Solomon D-6 quadrangle","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -165,\n              64.75\n            ],\n            [\n              -164.5,\n              64.75\n            ],\n            [\n              -164.5,\n              65\n            ],\n            [\n              -165,\n              65\n            ],\n            [\n              -165,\n              64.75\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a70e4b07f02db6411dc","contributors":{"authors":[{"text":"Sainsbury, C.L.","contributorId":99968,"corporation":false,"usgs":true,"family":"Sainsbury","given":"C.L.","email":"","affiliations":[],"preferred":false,"id":177092,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hudson, Travis","contributorId":90282,"corporation":false,"usgs":true,"family":"Hudson","given":"Travis","affiliations":[],"preferred":false,"id":177091,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ewing, Rodney","contributorId":106914,"corporation":false,"usgs":true,"family":"Ewing","given":"Rodney","affiliations":[],"preferred":false,"id":177093,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Richards, Thomas","contributorId":54622,"corporation":false,"usgs":true,"family":"Richards","given":"Thomas","email":"","affiliations":[],"preferred":false,"id":177090,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":1014327,"text":"1014327 - 1972 - Studies on the control of whirling disease (Myxosoma cerebralis)","interactions":[],"lastModifiedDate":"2025-04-07T15:23:32.021842","indexId":"1014327","displayToPublicDate":"1972-01-01T00:00:00","publicationYear":"1972","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2507,"text":"Journal of Wildlife Diseases","active":true,"publicationSubtype":{"id":10}},"title":"Studies on the control of whirling disease (Myxosoma cerebralis)","docAbstract":"<p><span>Based on presumptive evidence of death (extrusion of polar filaments and disintegration of sporoplasm) 1.0%, 0.5%, and 0.25% calcium oxide or potassium hydroxide killed the spores of&nbsp;</span><span class=\"genus-species\">Myxosoma cerebrallis</span><span>&nbsp;</span><i>in vitro</i><span>. Chlorine at 400 ppm destroyed 36% to 90% of the spores but 13% to 37% of those in the controls perished. Calcium hydroxide, ammonium chloride, sodium borate, potassium permanganate, Roccal (alkyl dimethylbenzylammonium chloride), and copper sulfate allowed survival of 38–96% of the spores, usually not much less than the rate of survival of the controls.</span></p><p><span>In simulated pond testing, quicklime at 380 grams or more per square meter (3360 lbs/acre) of pond bottom prevented whirling disease in rainbow trout (<i><span class=\"genus-species\">Salmo gairdneri</span></i>).</span></p>","language":"English","publisher":"BioOne","doi":"10.7589/0090-3558-8.1.49","usgsCitation":"Hoffman, G., and Hoffman, G., 1972, Studies on the control of whirling disease (Myxosoma cerebralis): Journal of Wildlife Diseases, v. 8, no. 1, p. 49-53, https://doi.org/10.7589/0090-3558-8.1.49.","productDescription":"5 p.","startPage":"49","endPage":"53","costCenters":[{"id":365,"text":"Leetown Science Center","active":true,"usgs":true}],"links":[{"id":488601,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.7589/0090-3558-8.1.49","text":"Publisher Index Page"},{"id":131067,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"8","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b05e4b07f02db699d48","contributors":{"authors":[{"text":"Hoffman, G.L. Sr.","contributorId":62963,"corporation":false,"usgs":true,"family":"Hoffman","given":"G.L.","suffix":"Sr.","email":"","affiliations":[],"preferred":false,"id":320203,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hoffman, G.L. Jr.","contributorId":102030,"corporation":false,"usgs":true,"family":"Hoffman","given":"G.L.","suffix":"Jr.","affiliations":[],"preferred":false,"id":320204,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70001516,"text":"70001516 - 1971 - Primary distribution of silver and copper in native gold from six deposits in the Western United States","interactions":[],"lastModifiedDate":"2020-12-18T00:39:34.834039","indexId":"70001516","displayToPublicDate":"2010-09-28T23:09:20","publicationYear":"1971","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2746,"text":"Mineralium Deposita","active":true,"publicationSubtype":{"id":10}},"title":"Primary distribution of silver and copper in native gold from six deposits in the Western United States","docAbstract":"<div id=\"Abs1-section\" class=\"c-article-section\"><div id=\"Abs1-content\" class=\"c-article-section__content\"><p>Electron-microprobe analyses and mineragraphic studies of native gold demonstrate considerable variations in the primary intergrain and intragrain distribution of silver. The gold grains have from 1–55 weight percent silver; copper is present in grains from only one locality and ranges from 0.1–0.6 weight percent. Some gold grains have strong zoning of silver whereas others have no detectable zoning. Gold grains from some deposits show remarkable intergrain homogeneity of silver and/or copper content, but others exhibit extreme heterogeneity. We believe that the inhomogeneities and variations in silver content recognized and emphasized here are features of primary deposition. We also recognize low-silver rims with sharp boundaries bordering many of the grains examined but believe these are developed in a relatively oxidizing, low-temperature environment and are not primary lode features. Opaque mineral inclusions of primary origin in gold grains are common in some deposits, scarce in many, and virtually absent from others. These inclusions may be of value in characterizing some gold deposits. For the majority of gold crystals from Copper Basin, Arizona, the lowest silver content observed was in the central portion of each grain and the highest silver content was in the rim. This is believed to be due an increase in the proportion of silver to gold in solution during growth of the crystals. Analysis of sized fractions of 331 gold grains from Pennsylvania Mountain, Colorado, shows no systematic correlation of grain size with silver content. Electron microprobe step-scanning of gold from Alder Gulch, Montana, suggests more than one mineralization event took place. Pyrite and acanthite inclusions less than 0.05 mm in the largest dimension, are present in some grains from this deposit. Inclusions of pyrite, pyrrhotite, chalcopyrite, and an isotropic Co-As-S mineral are present in the low-silver, copper-bearing gold from Ninemile Creek, Montana. The presence of copper and the low silver content in this gold is not typical of the gold-quartz-pyrite association which is common in the Western United States.</p></div></div>","language":"English","publisher":"Springer","doi":"10.1007/BF00201890","issn":"00264598","usgsCitation":"Desborough, G.A., Heidel, R.H., Raymond, W.H., and Tripp, J., 1971, Primary distribution of silver and copper in native gold from six deposits in the Western United States: Mineralium Deposita, v. 6, no. 4, p. 321-334, https://doi.org/10.1007/BF00201890.","productDescription":"14 p.","startPage":"321","endPage":"334","costCenters":[],"links":[{"id":203674,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Arizona, Colorado, Montana, South Dakota, 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A.","contributorId":34527,"corporation":false,"usgs":true,"family":"Desborough","given":"G.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":346786,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Heidel, Robert H.","contributorId":77647,"corporation":false,"usgs":true,"family":"Heidel","given":"Robert","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":346788,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Raymond, W. H.","contributorId":83919,"corporation":false,"usgs":true,"family":"Raymond","given":"W.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":346789,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Tripp, J.","contributorId":37872,"corporation":false,"usgs":true,"family":"Tripp","given":"J.","email":"","affiliations":[],"preferred":false,"id":346787,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":16281,"text":"ofr71284 - 1971 - The Shublik Formation and adjacent strata in northeastern Alaska description, minor elements, depositional environments and diagenesis","interactions":[],"lastModifiedDate":"2012-02-02T00:07:17","indexId":"ofr71284","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1971","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"71-284","title":"The Shublik Formation and adjacent strata in northeastern Alaska description, minor elements, depositional environments and diagenesis","docAbstract":"The Shublik Formation (Middle and Late Triassic) is widespread in the surface and subsurface of northern Alaska. Four stratigraphic sections along about 70 miles of the front of the northeastern Brooks Range east of the Canning giver were examined and sampled in detail in 1968. These sections and six-step spectrographic and carbon analyses of the samples combined with other data to provide a preliminary local description of the highly organic unit and of the paleoenvironments. \r\n\r\nThicknesses measured between the overlying Kingak Shale of Jurassic age and the underlying Sadlerochit Formation of Permian and Triassic age range from 400 to more than 800 feet but the 400 feet, obtained from the most completely exposed section, may be closer to the real thickness across the region. The sections consist of organic-rich, phosphatic, and fossiliferous muddy, silty, or carbonate rocks. The general sequence consists, from the bottom up, of a lower unit of phosphatic siltstone, a middle unit of phosphatic carbonate rocks, and an upper unit of shale and carbonate rocks near the Canning River and shale, carbonate rocks, and sandstone to the east.\r\n\r\nAlthough previously designated a basal member of the Kingak Shale (Jurassic), the upper unit is here included with the Shublik on the basis of its regional lithologic relation. \r\n\r\nThe minor element compositions of the samples of the Shublik Formation are consistent with their carbonaceous and phosphatic natures in that relatively large amounts of copper, molybdenum, nickel, vanadium and rare earths are present. The predominantly sandy rocks of the underlying Sadlerochit Formation (Permian and Triassic) have low contents of most minor elements. The compositions of samples of Kingak Shale have a wide range not readily explicable by the nature of the rock: an efflorescent sulfate salt contains 1,500 ppm nickel and 1,500 ppm zinc and large amounts of other metals derived from weathering of pyrite and leaching of local shale. The only recorded occurrence of silver and 300 ppm lead in gouge along a shear plane may be the result of metals introduced from an extraneous source. \r\n\r\nThe deposits reflect a marine environment that deepened somewhat following deposition of the Sadlerochit Formation and then shoaled during deposition of the upper limestone-siltstone unit. This apparently resulted from a moderate transgression and regression of the sea with respect to a northwest-trending line between Barrow and the Brooks Range at the International Boundary. Nearer shore facies appear eastward. The phosphate in nodules, fossil molds and oolites, appears to have formed diagenetically within the uncompacted sediment.","language":"ENGLISH","publisher":"U.S. Geological Survey],","doi":"10.3133/ofr71284","usgsCitation":"Tourtelot, H.A., and Tailleur, I.L., 1971, The Shublik Formation and adjacent strata in northeastern Alaska description, minor elements, depositional environments and diagenesis: U.S. Geological Survey Open-File Report 71-284, i, 62 leaves :2 folded col. maps ;27 cm., https://doi.org/10.3133/ofr71284.","productDescription":"i, 62 leaves :2 folded col. maps ;27 cm.","costCenters":[],"links":[{"id":150502,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1971/0284/report-thumb.jpg"},{"id":45207,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1971/0284/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":45208,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1971/0284/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ac6e4b07f02db67a958","contributors":{"authors":[{"text":"Tourtelot, Harry Allison","contributorId":77937,"corporation":false,"usgs":true,"family":"Tourtelot","given":"Harry","email":"","middleInitial":"Allison","affiliations":[],"preferred":false,"id":172546,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Tailleur, Irvin L.","contributorId":105304,"corporation":false,"usgs":true,"family":"Tailleur","given":"Irvin","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":172547,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":59473,"text":"mf312 - 1971 - Geochemical, aeromagnetic, and generalized geologic maps showing distribution and abundance of mercury and arsenic, Golconda and Iron Point quadrangles, Humboldt County, Nevada","interactions":[],"lastModifiedDate":"2016-08-22T10:32:10","indexId":"mf312","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1971","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":325,"text":"Miscellaneous Field Studies Map","code":"MF","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"312","title":"Geochemical, aeromagnetic, and generalized geologic maps showing distribution and abundance of mercury and arsenic, Golconda and Iron Point quadrangles, Humboldt County, Nevada","docAbstract":"<p>Detailed geologic and geochemical studies of the four 7 1/2-minute wuadrangles that make up the Edna Mountain 15-minute quadrangle in Humboldt County, Nevada, were begun druring the 1969 summer field season. The objectives of the project are to map the geology of this structurally complex area at 1:24,000&nbsp;scale and to determine the regional distribution and abundance of metals in rocks of the area and the factors that control the distribution and abundance of those metals. Tungsten-bearing hot-spring tufa, metalliferous black shale in Ordovician rocks, base-metal and barite deposits in Paleozoic sedimentary rocks, and copper-molybdenum in granodiorite plutons of Creataceous age occur in the Edna Mountain dare. None of these deposits have been of much economic significance, although tungsten was mined from the hot-spring deposits during World War II.&nbsp;</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/mf312","usgsCitation":"Erickson, R.L., and Marsh, S., 1971, Geochemical, aeromagnetic, and generalized geologic maps showing distribution and abundance of mercury and arsenic, Golconda and Iron Point quadrangles, Humboldt County, Nevada: U.S. Geological Survey Miscellaneous Field Studies Map 312, 2 plates: 32.35 x 22.90 and 31.77 x 23.02 inches, https://doi.org/10.3133/mf312.","productDescription":"2 plates: 32.35 x 22.90 and 31.77 x 23.02 inches","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":180575,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/mf312.PNG"},{"id":327217,"rank":1,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/mf/0312/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":327218,"rank":2,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/mf/0312/plate-2.pdf","linkFileType":{"id":1,"text":"pdf"}}],"scale":"0","country":"United States","state":"Nevada","county":"Humboldt","otherGeospatial":"Golconda, Iron Point Quadrangles","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -117.5,40.8675 ], [ -117.5,41 ], [ -117.25,41 ], [ -117.25,40.8675 ], [ -117.5,40.8675 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b1fe4b07f02db6ab8bc","contributors":{"authors":[{"text":"Erickson, R. L.","contributorId":26318,"corporation":false,"usgs":true,"family":"Erickson","given":"R.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":262078,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Marsh, S.P.","contributorId":32913,"corporation":false,"usgs":true,"family":"Marsh","given":"S.P.","email":"","affiliations":[],"preferred":false,"id":262079,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":59471,"text":"mf315 - 1971 - Geochemical, aeromagnetic, and generalized geologic maps showing distribution and abundance of lead and silver, Golconda and Iron Point quadrangles, Humboldt County, Nevada","interactions":[],"lastModifiedDate":"2018-07-18T14:20:40","indexId":"mf315","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1971","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":325,"text":"Miscellaneous Field Studies Map","code":"MF","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"315","title":"Geochemical, aeromagnetic, and generalized geologic maps showing distribution and abundance of lead and silver, Golconda and Iron Point quadrangles, Humboldt County, Nevada","docAbstract":"<p>Detailed geologic and geochemical studies of the four 7 1/2-minute quadrangles that make up the Edna Mountain 15-minute quadrangle in Humboldt County, Nevada, were begun during the 1969 summer field season. The objectives of the project are to map the geology of this struct urally complex area at 1:24·,000 scale and to determine the regional distribution and abundance of metals in rocks of the are\\3. and the factors that control the distribution and abundance of those metals. Tungstenbearing hot-spring tufa, metalliferous black shale in Ordovician rocks, base-metal and barite deposits in Paleozoic sedimentary rocks, and copper-molybdenum in granodiorite plutons of Cretaceous age occur in the Edna Mountain area. None of these deposits have been of much economic significance, although tungsten was mined from the hot-spring deposits during World War II.</p><p>The numerous occurrences of mineralized ground, however, along with the broad spectrum of types of mineralization, intensity of alteration, structural complexity, and abundance of intermediate to silicic igneous intrusive rocks suggest that concealed or heretofore unrecognized mineral deposits may exist in the area. Integrated geologic, geochemical, and geophysical studies on a district- wide scale might improve our un~erstanding of the factors that control the distribution, methods of emplacement, and spatial and genetic relationships (if any) of these different types of deposits. We hope that broad target areas or guidelines for mineral exploration in th.is area may be identified.</p><p>This series of maps shows the distribu t ion and abundance of mercury, arsenic, antimony, tungsten, gold, copper, l ead, and s ilver related to a geologic and aeromagnetic base in the Golconda and Iron Point 7 1/2-minute quadrangles. All samples are rock samples; most are f rom shear or f ault zones, fractures, jasperoid, breccia reefs, and altered rocks . All the samples were prepared and analyzed in truck-mounted laboratories at Wi nnemucca, Nevada. Arsenic , tungs t en, copper, lead, and si lver were determined by semiquantitative spectrogr aph i c methods by D. F. Siems and E. F. Cooley . Mercury and gold were determined by atomi c absorption methods and antimony was determined by a colorimetric method by R. M. O'Leary, M. S. Erickson, and others.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/mf315","usgsCitation":"Erickson, R.L., and Marsh, S., 1971, Geochemical, aeromagnetic, and generalized geologic maps showing distribution and abundance of lead and silver, Golconda and Iron Point quadrangles, Humboldt County, Nevada: U.S. Geological Survey Miscellaneous Field Studies Map 315, 2 Plates: 34.16 x 22.32 inches and 35.67 x 23.76 inches, https://doi.org/10.3133/mf315.","productDescription":"2 Plates: 34.16 x 22.32 inches and 35.67 x 23.76 inches","costCenters":[],"links":[{"id":180573,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"}],"scale":"0","country":"United States","state":"Nevada","county":"Humboldt County","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -117.5,40.8675 ], [ -117.5,41 ], [ -117.25,41 ], [ -117.25,40.8675 ], [ -117.5,40.8675 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b1fe4b07f02db6ab878","contributors":{"authors":[{"text":"Erickson, R. L.","contributorId":26318,"corporation":false,"usgs":true,"family":"Erickson","given":"R.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":262074,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Marsh, S.P.","contributorId":32913,"corporation":false,"usgs":true,"family":"Marsh","given":"S.P.","email":"","affiliations":[],"preferred":false,"id":262075,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":47159,"text":"ofr71282 - 1971 - Geologic map of the Copper Canyon area, Battle Mountain mining district, Lander County, Nevada","interactions":[],"lastModifiedDate":"2012-02-02T00:04:58","indexId":"ofr71282","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1971","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"71-282","title":"Geologic map of the Copper Canyon area, Battle Mountain mining district, Lander County, Nevada","language":"ENGLISH","doi":"10.3133/ofr71282","usgsCitation":"Theodore, T.G., 1971, Geologic map of the Copper Canyon area, Battle Mountain mining district, Lander County, Nevada: U.S. Geological Survey Open-File Report 71-282, 1 map +1 explanation sheet., https://doi.org/10.3133/ofr71282.","productDescription":"1 map +1 explanation sheet.","costCenters":[],"links":[{"id":134531,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":84157,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1971/0282/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":84158,"rank":401,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1971/0282/plate-2.pdf","linkFileType":{"id":1,"text":"pdf"}}],"scale":"4800","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b09e4b07f02db69c849","contributors":{"authors":[{"text":"Theodore, T. G.","contributorId":38122,"corporation":false,"usgs":true,"family":"Theodore","given":"T.","middleInitial":"G.","affiliations":[],"preferred":false,"id":234729,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":59469,"text":"mf314 - 1971 - Geochemical, aeromagnetic, and generalized geologic maps showing distribution and abundance of gold and copper, Golconda and Iron Point quadrangles, Humboldt County, Nevada","interactions":[],"lastModifiedDate":"2016-08-22T10:33:27","indexId":"mf314","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1971","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":325,"text":"Miscellaneous Field Studies Map","code":"MF","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"314","title":"Geochemical, aeromagnetic, and generalized geologic maps showing distribution and abundance of gold and copper, Golconda and Iron Point quadrangles, Humboldt County, Nevada","docAbstract":"<p>Detailed geologic and geochemical studies of the four 7 1/2-minute quadrangles that make up the Edna Mountain 15-minute quadrangle in Humboldt County, Nevada, were begun during the 1969 summer field season. &nbsp;The objectives of the project are to map the geology of this structurally complex area at 1:24,000 scale and to determine the regional distribution and abundance of metals in rocks of the area and the factors that control the distribution and abundance of those metals. &nbsp;Tungsten-bearing hot-spring tufa, metalliferous black shale in Ordovician rocks, base-metal and barite deposits in Paleozoic sedimentary rocks, and copper-molybdenum in granodiorite plutons of Cretaceous age occur in the Edna Mountain area. &nbsp;None of these deposits have been of much economic signigicance, although tungsten was mined from the hot-spring deposits during World War II.</p>","language":"English","publisher":"U.S. Government Printing Office","publisherLocation":"Washington, D.C.","doi":"10.3133/mf314","usgsCitation":"Erickson, R.L., and Marsh, S., 1971, Geochemical, aeromagnetic, and generalized geologic maps showing distribution and abundance of gold and copper, Golconda and Iron Point quadrangles, Humboldt County, Nevada: U.S. Geological Survey Miscellaneous Field Studies Map 314, 2 Sheets: 31.62 x 22.78 inches and 31.92 x 22.63 inches, https://doi.org/10.3133/mf314.","productDescription":"2 Sheets: 31.62 x 22.78 inches and 31.92 x 22.63 inches","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":180571,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/mf314.PNG"},{"id":327219,"rank":1,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/mf/0314/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":327220,"rank":2,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/mf/0314/plate-2.pdf","linkFileType":{"id":1,"text":"pdf"}}],"scale":"0","country":"United States","state":"Nevada","county":"Humboldt County","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -117.5,40.8675 ], [ -117.5,41 ], [ -117.25,41 ], [ -117.25,40.8675 ], [ -117.5,40.8675 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b20e4b07f02db6ab8f1","contributors":{"authors":[{"text":"Erickson, R. L.","contributorId":26318,"corporation":false,"usgs":true,"family":"Erickson","given":"R.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":262070,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Marsh, S.P.","contributorId":32913,"corporation":false,"usgs":true,"family":"Marsh","given":"S.P.","email":"","affiliations":[],"preferred":false,"id":262071,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":59467,"text":"mf313 - 1971 - Geochemical, aeromagnetic, and generalized geologic maps showing distribution and abundance of antimony and tungsten, Golconda and Iron Point quadrangles, Humboldt County, Nevada","interactions":[],"lastModifiedDate":"2016-08-22T10:34:32","indexId":"mf313","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1971","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":325,"text":"Miscellaneous Field Studies Map","code":"MF","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"313","title":"Geochemical, aeromagnetic, and generalized geologic maps showing distribution and abundance of antimony and tungsten, Golconda and Iron Point quadrangles, Humboldt County, Nevada","docAbstract":"<p>Detailed geologic and geochemical studies of the four 7 1/2-minute quadrangles that make up the Edna Mountain 15-minute quadrangle in Humboldt County, Nevada, were begun during the 1969 summer field season. The objectives of the project are to map the geology of this structurally complex area at 1:24,000 scale and to determine the regional distribution and abundance of metals in rocks of the area and the factors that control the distribution and abundance of those metals. Tungsten-bearing hot-spring tufa, metalliferous black shale in Ordovician rocks , base-metal and barite deposits in Paleozoic sedimentary rocks, and copper molydbenum in granodiorite plutons of Cretaceous age occur in the Edna Mountain area. None of these deposits have been of much economic significance, although tungsten was mined from the hot-spring deposits during World War II.&nbsp;</p>","language":"English","doi":"10.3133/mf313","usgsCitation":"Erickson, R.L., and Marsh, S., 1971, Geochemical, aeromagnetic, and generalized geologic maps showing distribution and abundance of antimony and tungsten, Golconda and Iron Point quadrangles, Humboldt County, Nevada: U.S. Geological Survey Miscellaneous Field Studies Map 313, 2 plates: 31.92 x 22.32 and 31.91 x 22.31 inches, https://doi.org/10.3133/mf313.","productDescription":"2 plates: 31.92 x 22.32 and 31.91 x 22.31 inches","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":180511,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/mf313.GIF"},{"id":327221,"rank":1,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/mf/0313/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":327222,"rank":2,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/mf/0313/plate-2.pdf","linkFileType":{"id":1,"text":"pdf"}}],"scale":"0","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -117.5,40.8675 ], [ -117.5,41 ], [ -117.25,41 ], [ -117.25,40.8675 ], [ -117.5,40.8675 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b1fe4b07f02db6ab8d3","contributors":{"authors":[{"text":"Erickson, R. L.","contributorId":26318,"corporation":false,"usgs":true,"family":"Erickson","given":"R.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":262066,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Marsh, S.P.","contributorId":32913,"corporation":false,"usgs":true,"family":"Marsh","given":"S.P.","email":"","affiliations":[],"preferred":false,"id":262067,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
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