{"pageNumber":"73","pageRowStart":"1800","pageSize":"25","recordCount":2263,"records":[{"id":58340,"text":"mf767M - 1976 - Composite geochemical map of anomalous copper and molybdenum distribution in the Tanacross Quadrangle, Alaska","interactions":[],"lastModifiedDate":"2023-04-18T21:01:30.554693","indexId":"mf767M","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1976","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":"767","chapter":"M","title":"Composite geochemical map of anomalous copper and molybdenum distribution in the Tanacross Quadrangle, Alaska","docAbstract":"<p>This geochemical map delineates drainage basins in which either anomalous copper, molybdenum, or both copper and molybdenum were detected in at least one of four sample media: <span>(A) the oxide residue (the oxalic-acid-leachable fraction) of the stream sediment, (B) the minus-80-mesh stream sediment, (C) the ash of streambank sod (mixed organic and inorganic material) collected beneath the water level, and (D) the ash of aquatic bryophytes (mosses). The anomaly patterns were derived from the point-plot maps of copper and molybdenum distribution in the individual sample media (Curtain, Day, O'Leary, Marsh, and Tripp, 1976; Curtain, Day, Carten, Marsh, and Tripp, 1976). Background data were disregarded for each of the two metals. Weakly anomalous data for all media (small black symbols) were assigned the number 2; strongly anomalous data for all media (large black symbols) were assigned the number 3. These new data were then summed or \"stacked\" for each metal so that all sites showing anomalous values in one or more of the sample media had a numerical rating that ranged from 2 (weakly anomalous value in one sample medium) to a possible 12 (strongly anomalous values in all four sample media). The summed data were ranked into three groups shown in the explanation. The drainage basins showing anomalous values were outlined according to these groups. As a final step the composite copper anomaly map was superimposed on that of molybdenum to give this composite copper-molybdenum map.</span></p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/mf767M","usgsCitation":"Curtin, G., Day, G., O’Leary, R.M., Marsh, S., and Tripp, R.B., 1976, Composite geochemical map of anomalous copper and molybdenum distribution in the Tanacross Quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map 767, 1 Plate: 38.52 x 25.19 inches, https://doi.org/10.3133/mf767M.","productDescription":"1 Plate: 38.52 x 25.19 inches","costCenters":[],"links":[{"id":184542,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/mf/0767-M/report-thumb.jpg"},{"id":415960,"rank":2,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/mf/0767-M/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}}],"scale":"250000","country":"United States","state":"Alaska","otherGeospatial":"Tanacross Quadrangle","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -144,63 ], [ -144,64 ], [ -141,64 ], [ -141,63 ], [ -144,63 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b1ae4b07f02db6a82a1","contributors":{"authors":[{"text":"Curtin, G.C.","contributorId":89501,"corporation":false,"usgs":true,"family":"Curtin","given":"G.C.","email":"","affiliations":[],"preferred":false,"id":258796,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Day, G.W.","contributorId":63363,"corporation":false,"usgs":true,"family":"Day","given":"G.W.","email":"","affiliations":[],"preferred":false,"id":258794,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"O’Leary, R. M.","contributorId":44894,"corporation":false,"usgs":true,"family":"O’Leary","given":"R.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":258793,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Marsh, S.P.","contributorId":32913,"corporation":false,"usgs":true,"family":"Marsh","given":"S.P.","email":"","affiliations":[],"preferred":false,"id":258792,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Tripp, R. B.","contributorId":88707,"corporation":false,"usgs":true,"family":"Tripp","given":"R.","middleInitial":"B.","affiliations":[],"preferred":false,"id":258795,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":7489,"text":"ofr76559 - 1976 - Results of geochemical investigations comparing samples of stream sediment, panned concentrate, and vegetation in the vicinity of the Caridad porphyry copper deposit, northern Sonora, Mexico","interactions":[],"lastModifiedDate":"2012-02-02T00:06:04","indexId":"ofr76559","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1976","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":"76-559","title":"Results of geochemical investigations comparing samples of stream sediment, panned concentrate, and vegetation in the vicinity of the Caridad porphyry copper deposit, northern Sonora, Mexico","language":"ENGLISH","publisher":"U.S. Geological Survey,","doi":"10.3133/ofr76559","usgsCitation":"Chaffee, M.A., Lee-Moreno, J., Caire, L., Mosier, E.L., and Frisken, J., 1976, Results of geochemical investigations comparing samples of stream sediment, panned concentrate, and vegetation in the vicinity of the Caridad porphyry copper deposit, northern Sonora, Mexico: U.S. Geological Survey Open-File Report 76-559, i, 34 leaves :maps ;28 cm., https://doi.org/10.3133/ofr76559.","productDescription":"i, 34 leaves :maps ;28 cm.","costCenters":[],"links":[{"id":140453,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a2ce4b07f02db613c85","contributors":{"authors":[{"text":"Chaffee, Maurice A. mchaffee@usgs.gov","contributorId":4047,"corporation":false,"usgs":true,"family":"Chaffee","given":"Maurice","email":"mchaffee@usgs.gov","middleInitial":"A.","affiliations":[{"id":171,"text":"Central Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":155852,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lee-Moreno, J.","contributorId":78323,"corporation":false,"usgs":true,"family":"Lee-Moreno","given":"J.","affiliations":[],"preferred":false,"id":155855,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Caire, L.F.","contributorId":61418,"corporation":false,"usgs":true,"family":"Caire","given":"L.F.","email":"","affiliations":[],"preferred":false,"id":155853,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Mosier, E. L.","contributorId":71537,"corporation":false,"usgs":true,"family":"Mosier","given":"E.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":155854,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Frisken, J. G.","contributorId":90296,"corporation":false,"usgs":true,"family":"Frisken","given":"J. G.","affiliations":[],"preferred":false,"id":155856,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":12910,"text":"ofr76294 - 1976 - Submarine faults and slides that disrupt surficial sedimentary units, northern Gulf of Alaska","interactions":[{"subject":{"id":12910,"text":"ofr76294 - 1976 - Submarine faults and slides that disrupt surficial sedimentary units, northern Gulf of Alaska","indexId":"ofr76294","publicationYear":"1976","noYear":false,"title":"Submarine faults and slides that disrupt surficial sedimentary units, northern Gulf of Alaska"},"predicate":"SUPERSEDED_BY","object":{"id":70043278,"text":"70043278 - 1977 - Submarine faults and slides on the continental shelf, northern Gulf of Alaska","indexId":"70043278","publicationYear":"1977","noYear":false,"title":"Submarine faults and slides on the continental shelf, northern Gulf of Alaska"},"id":1}],"supersededBy":{"id":70043278,"text":"70043278 - 1977 - Submarine faults and slides on the continental shelf, northern Gulf of Alaska","indexId":"70043278","publicationYear":"1977","noYear":false,"title":"Submarine faults and slides on the continental shelf, northern Gulf of Alaska"},"lastModifiedDate":"2023-07-28T19:52:03.976576","indexId":"ofr76294","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1976","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":"76-294","title":"Submarine faults and slides that disrupt surficial sedimentary units, northern Gulf of Alaska","docAbstract":"<p>Faults and submarine slides or slumps of Quaternary age are potential environmental hazards on the outer continental shelf (OCS) of the northern Gulf of Alaska. Most of the faults that approach or reach the seafloor cut strata that may be equivalent to the upper Yakataga Formation (Pliocene-Pleistocene). Along several faults the seafloor is offset from 5 to 20 m. A few faults appear to cut Holocene sediments, but none of these show offset at the seafloor.</p><p>Submarine slides or slumps have been found in two places in the OCS region: (1) seaward of the Malaspina Glacier and Icy Bay, an affected area of 1,770 km<sup>2</sup> with a slope of less than one-half degree, and (2) across the entire span of the Copper River prodelta, an area of 1,730 km<sup>2</sup>, having a slope of about one-half degree. Seismic profiles across these slide areas show disrupted reflectors and irregular topography commonly associated with submarine slides or slumps. Potential slide or slump areas have been delineated in areas of thick sediment accumulation and relatively steep slopes. These areas include (1) Kayak Trough, (2) parts of Hinchinbrook Entrance and Sea Valley, (3) parts of the outer shelf and upper slope between Kayak Island and Yakutat Bay and (4) Bering Trough.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr76294","usgsCitation":"Carlson, P.R., 1976, Submarine faults and slides that disrupt surficial sedimentary units, northern Gulf of Alaska: U.S. Geological Survey Open-File Report 76-294, 27 p., https://doi.org/10.3133/ofr76294.","productDescription":"27 p.","costCenters":[],"links":[{"id":419417,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1976/0294/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":146205,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1976/0294/report-thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"northern Gulf of Alaska","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -154.4887502112094,\n              60.350594260052645\n            ],\n            [\n              -154.4887502112094,\n              58.17336193033316\n            ],\n            [\n              -136.57229454249227,\n              58.17336193033316\n            ],\n            [\n              -136.57229454249227,\n              60.350594260052645\n            ],\n            [\n              -154.4887502112094,\n              60.350594260052645\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b05e4b07f02db699bd5","contributors":{"authors":[{"text":"Carlson, Paul R.","contributorId":81469,"corporation":false,"usgs":true,"family":"Carlson","given":"Paul","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":166939,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":12790,"text":"ofr76287 - 1976 - Preliminary investigation of the elemental variation and diagenesis of a tabular uranium deposit, La Sal Mine, San Juan County, Utah","interactions":[],"lastModifiedDate":"2012-02-02T00:06:56","indexId":"ofr76287","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1976","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":"76-287","title":"Preliminary investigation of the elemental variation and diagenesis of a tabular uranium deposit, La Sal Mine, San Juan County, Utah","docAbstract":"Ore in the La Sal mine, San Juan County, Utah, occurs as a typical tabular-type uranium deposit of the-Colorado Plateau. Uranium-vanadium occurs in the Salt Wash Member of the Jurassic Morrison Formation. \r\n\r\nChemical and petrographic analyses were used to determine elemental variation and diagenetic aspects across the orebody. Vanadium is concentrated in the dark clay matrix, which constitutes visible ore. Uranium content is greater above the vanadium zone. Calcium, carbonate carbon, and lead show greater than fifty-fold increase across the ore zone, whereas copper and organic carbon show only a several-fold increase. Large molybdenum concentrations are present in and above the tabular layer, and large selenium concentrations occur below the uranium zone within the richest vanadium zone. Iron is enriched in the vanadium horizon. Chromium is depleted from above the ore and strongly enriched below. Elements that vary directly with the vanadium content include magnesium, iron, selenium, zirconium, strontium, titanium, lead, boron, yttrium, and scandium. \r\n\r\nThe diagenetic sequence is as follows: (1) formation of secondary quartz overgrowths as cement; (2) infilling and lining of remaining pores with amber opaline material; (3) formation of vanadium-rich clay matrix, which has replaced overgrowths as well as quartz grains; (4) replacement of overgrowths and detrital grains by calcite; (5) infilling of pores with barite and the introduction of pyrite and marcasite.","language":"ENGLISH","publisher":"U.S. Geological Survey,","doi":"10.3133/ofr76287","usgsCitation":"Brooks, R.A., and Campbell, J.A., 1976, Preliminary investigation of the elemental variation and diagenesis of a tabular uranium deposit, La Sal Mine, San Juan County, Utah: U.S. Geological Survey Open-File Report 76-287, ii, 30 p. :ill., maps ;27 cm., https://doi.org/10.3133/ofr76287.","productDescription":"ii, 30 p. :ill., maps ;27 cm.","costCenters":[],"links":[{"id":146714,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1976/0287/report-thumb.jpg"},{"id":41198,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1976/0287/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ab1e4b07f02db66eaf1","contributors":{"authors":[{"text":"Brooks, Robert A.","contributorId":60645,"corporation":false,"usgs":true,"family":"Brooks","given":"Robert","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":166715,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Campbell, John A.","contributorId":67089,"corporation":false,"usgs":true,"family":"Campbell","given":"John","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":166716,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":6499,"text":"pp907C - 1976 - Copper Deposits in Sedimentary and Volcanogenic Rocks","interactions":[],"lastModifiedDate":"2012-02-02T00:05:53","indexId":"pp907C","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1976","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":331,"text":"Professional Paper","code":"PP","onlineIssn":"2330-7102","printIssn":"1044-9612","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"907","chapter":"C","title":"Copper Deposits in Sedimentary and Volcanogenic Rocks","docAbstract":"Copper deposits occur in sedimentary and volcanogenic rocks within a wide variety of geologic environments where there may be little or no evidence of hydrothermal alteration. Some deposits may be hypogene and have a deep-seated source for the ore fluids, but because of rapid cooling and dilution during syngenetic deposition on the ocean floor, the resulting deposits are not associated with hydrothermal alteration. Many of these deposits are formed at or near major tectonic features on the Earth's crust, including plate boundaries, rift valleys, and island arcs. The resulting ore bodies may be stratabound and either massive or disseminated.\r\n\r\nOther deposits form in rocks deposited in shallow-marine, deltaic, and nonmarine environments by the movement and reaction of interstratal brines whose metal content is derived from buried sedimentary and volcanic rocks. Some of the world's largest copper deposits were probably formed in this manner. This process we regard as diagenetic, but some would regard it as syngenetic, if the ore metals are derived from disseminated metal in the host-rock sequence, and others would regard the process as epigenetic, if there is demonstrable evidence of ore cutting across bedding. Because the oxidation associated with diagenetic red beds releases copper to ground-water solutions, red rocks and copper deposits are commonly associated. However, the ultimate size, shape, and mineral zoning of a deposit result from local conditions at the site of deposition - a logjam in fluvial channel sandstone may result in an irregular tabular body of limited size; a petroleum-water interface in an oil pool may result in a copper deposit limited by the size and shape of the petroleum reservoir; a persistent thin bed of black shale may result in a copper deposit the size and shape of that single bed.\r\n\r\nThe process of supergene enrichment has been largely overlooked in descriptions of copper deposits in sedimentary rocks. However, supergene processes may be involved during erosion of any primary ore body and its ultimate displacement and redeposition as a secondary deposit. Bleached sandstone at the surface may indicate significant ore deposits near the water table. ","language":"ENGLISH","publisher":"U.S. Geological Survey","doi":"10.3133/pp907C","usgsCitation":"Tourtelot, E.B., and Vine, J.D., 1976, Copper Deposits in Sedimentary and Volcanogenic Rocks: U.S. Geological Survey Professional Paper 907, vi, 34 p., https://doi.org/10.3133/pp907C.","productDescription":"vi, 34 p.","costCenters":[{"id":595,"text":"U.S. Geological Survey","active":false,"usgs":true}],"links":[{"id":117815,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/pp/0907c/report-thumb.jpg"},{"id":33956,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/pp/0907c/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4adce4b07f02db686316","contributors":{"authors":[{"text":"Tourtelot, Elizabeth B.","contributorId":24341,"corporation":false,"usgs":true,"family":"Tourtelot","given":"Elizabeth","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":152830,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Vine, James David","contributorId":52147,"corporation":false,"usgs":true,"family":"Vine","given":"James","email":"","middleInitial":"David","affiliations":[],"preferred":false,"id":152831,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":42397,"text":"ofr76458 - 1976 - Preliminary map showing potential for copper deposits in the Tucson 2° quadrangle, Arizona","interactions":[{"subject":{"id":42396,"text":"ofr74143 - 1974 - Preliminary map showing potential for copper deposits in the east half of the Tuscon 2 degrees Quadrangle, Arizona","indexId":"ofr74143","publicationYear":"1974","noYear":false,"title":"Preliminary map showing potential for copper deposits in the east half of the Tuscon 2 degrees Quadrangle, Arizona"},"predicate":"SUPERSEDED_BY","object":{"id":42397,"text":"ofr76458 - 1976 - Preliminary map showing potential for copper deposits in the Tucson 2° quadrangle, Arizona","indexId":"ofr76458","publicationYear":"1976","noYear":false,"title":"Preliminary map showing potential for copper deposits in the Tucson 2° quadrangle, Arizona"},"id":1}],"lastModifiedDate":"2021-10-04T21:36:17.206562","indexId":"ofr76458","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1976","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":"76-458","title":"Preliminary map showing potential for copper deposits in the Tucson 2° quadrangle, Arizona","docAbstract":"<p>No abstract available.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr76458","usgsCitation":"Water Resources Division, U.S. Geological Survey, 1976, Preliminary map showing potential for copper deposits in the Tucson 2° quadrangle, Arizona: U.S. Geological Survey Open-File Report 76-458, 1 Plate: 42.28 × 24.31 inches, https://doi.org/10.3133/ofr76458.","productDescription":"1 Plate: 42.28 × 24.31 inches","costCenters":[],"links":[{"id":80161,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1976/0458/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":135281,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":390220,"rank":3,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_15339.htm"}],"scale":"250000","country":"United States","state":"Arizona","otherGeospatial":"Tucson 2° quadrangle","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -112,\n              32\n            ],\n            [\n              -110,\n              32\n            ],\n            [\n              -110,\n              33\n            ],\n            [\n              -112,\n              33\n            ],\n            [\n              -112,\n              32\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ab0e4b07f02db66d66a","contributors":{"authors":[{"text":"Water Resources Division, U.S. Geological Survey","contributorId":128075,"corporation":true,"usgs":false,"organization":"Water Resources Division, U.S. Geological Survey","id":530922,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":11234,"text":"ofr7656 - 1976 - Mineral resources of Elko County, Nevada","interactions":[],"lastModifiedDate":"2012-02-02T00:06:31","indexId":"ofr7656","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1976","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":"76-56","title":"Mineral resources of Elko County, Nevada","docAbstract":"Of the 66 named mining districts in Elko County, 56 have been productive of one or more of 19 different commodities: 11 metals--copper, gold, silver, lead, zinc, mercury, tungsten, manganese, iron, uranium, and antimony; 8 nonmetals--sand and gravel, stone, barite, diatomite, gems, oil shale, volcanic ash, and clay. In addition to the commodities produced, at least 5 others--beryllium, molybdenum, tin, phosphorite, and petroleum, occur in amounts sufficient to warrant exploration. The other districts have been explored, but no production has been recorded. \r\n\r\nTotal value-when-sold of production recorded through 1969 was nearly $91 million; actual production was considerably greater, especially if sand and gravel, barite, and other nonmetallic products before 1953 are included. In value of metals produced, the five highest districts are Mountain City ($26 million), Tuscarora ($11 million), Jarbidge ($10 million), Aura ($6 million), and Railroad (nearly $5 million). The Rio Tinto copper mine in the Mountain City district yielded $21 million. Of the 17 districts that produced nonmetallic minerals, Bootstrap .is the largest producer, containing the Rossi mine, one of the two largest barite mines in the United States. \r\n\r\nMost of /he metals produced name from veins and replacement deposits in limestone or dolomite near granitic stocks; exceptions are manganese and mercury, which are not associated with known or inferred stocks; mercury is further excepted because it occurs in volcanic rocks, as do a few deposits of the major metals. The largest deposit--the Rio Tinto lode--was a combination of fissure filling and replacement along a bedding plane shear zone 150 ft wide and 1,200 ft long in carbonaceous shale of the Valmy Formation; this deposit is apparently older than the Mountain City stock and its mineralization may be related to Paleozoic mafic volcanism later than a major thrust fault, inferred to underlie the area at a depth of about 5,000 ft. \r\n\r\nMost of the nonmetallic minerals mined were sedimentary bedded deposits, but mica was mined from pegmatite deposits, and turquoise from both placer and hydrothermal deposits.\r\n\r\nThe largest known reserves of metals (1973) are of porphyry copper in the Dolly Varden district and gold in the Bootstrap district. Reserves of barite also are presumed to be large.\r\n\r\nThe greatest potential for future production of metals, notably copper and gold, appears to be in the known districts or extensions of them and peripheral to deposits that are related to known or concealed plutons and thrust faults. Potential resources in deposits too low in grade to be worked profitably at the present time include all commodities that have been produced and, in addition, known, deposits of beryllium, molybdenum, tin, and phosphorite. Speculative resources in undiscovered deposits may reasonably be predicted to include all known commodities as well as others that are unsuspected. Petroleum may yet be produced from the Elko Formation and geothermal energy from the Ruby Valley and Elko areas.","language":"ENGLISH","publisher":"U.S. Geological Survey,","doi":"10.3133/ofr7656","usgsCitation":"Smith, R.M., 1976, Mineral resources of Elko County, Nevada: U.S. Geological Survey Open-File Report 76-56, 201 leaves :maps ;29 cm.; (194 p., 1 sheet - PGS), https://doi.org/10.3133/ofr7656.","productDescription":"201 leaves :maps ;29 cm.; (194 p., 1 sheet - PGS)","costCenters":[],"links":[{"id":95005,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1976/0056/plate-1.pdf","size":"12013","linkFileType":{"id":1,"text":"pdf"}},{"id":95006,"rank":401,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1976/0056/plate-2.pdf","size":"8301","linkFileType":{"id":1,"text":"pdf"}},{"id":144012,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1976/0056/report-thumb.jpg"},{"id":39021,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1976/0056/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a1ae4b07f02db606432","contributors":{"authors":[{"text":"Smith, Roscoe Maurice","contributorId":78745,"corporation":false,"usgs":true,"family":"Smith","given":"Roscoe","email":"","middleInitial":"Maurice","affiliations":[],"preferred":false,"id":162781,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":20250,"text":"ofr76482 - 1976 - Fluid inclusions as a guide to porphyry copper deposits","interactions":[],"lastModifiedDate":"2012-02-02T00:07:44","indexId":"ofr76482","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1976","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":"76-482","title":"Fluid inclusions as a guide to porphyry copper deposits","language":"ENGLISH","publisher":"U.S. Geological Survey,","doi":"10.3133/ofr76482","usgsCitation":"Nash, J.T., 1976, Fluid inclusions as a guide to porphyry copper deposits: U.S. Geological Survey Open-File Report 76-482, 16 leaves ;28 cm., https://doi.org/10.3133/ofr76482.","productDescription":"16 leaves ;28 cm.","costCenters":[],"links":[{"id":152986,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49d6e4b07f02db5de754","contributors":{"authors":[{"text":"Nash, J. Thomas","contributorId":26306,"corporation":false,"usgs":true,"family":"Nash","given":"J.","email":"","middleInitial":"Thomas","affiliations":[],"preferred":false,"id":182329,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":6222,"text":"pp907D - 1976 - Fluid-Inclusion Petrology - Data from Porphyry Copper Deposits and Applications to Exploration","interactions":[],"lastModifiedDate":"2012-02-10T00:10:07","indexId":"pp907D","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1976","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":331,"text":"Professional Paper","code":"PP","onlineIssn":"2330-7102","printIssn":"1044-9612","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"907","chapter":"D","title":"Fluid-Inclusion Petrology - Data from Porphyry Copper Deposits and Applications to Exploration","docAbstract":"Fluid-inclusion studies of 37 porphyry copper deposits, mainly in the United States, demonstrate that all but 3 evolved through a hydrothermal stage characterized by very high salinities, generally in excess of about 35 weight percent NaCI equivalent. Temperatures of these fluids ranged from about 250 deg to 700 deg C for various stages and deposits. Most systems boiled. High salinities, shown by halite-bearing inclusions, and boiling, suggested by coexisting gas and liquid-rich inclusions, are considered to be diagnostic of epizonal intrusions which are the most favorable parents for porphyry copper mineralization. Depth of emplacement of many copper-bearing stocks is deduced from fluid inclusions to have been about 6,000 to 10,000 feet (1,800 to 3,000 metres); fluid pressures during mineralization are interpreted generally to be less than 500 bars.\r\n\r\nModerate-salinity (less than about 12 percent) and moderate-temperature <350 deg C) fluids are noted in all porphyry copper deposits and were responsible for the deposition of most copper and molybdenum in deposits, such as Bagdad, Esperanza, Mineral Park, Morenci, Ray, Sierrita, in the Southwestern United States and several in southern British Columbia. However, with only three exceptions, highly saline fluids apparently were present at an early stage and also deposited metals. The relative amounts and economic importance of copper and molybdenum deposited from high- and moderate-salinity fluids varies within the porphyry deposit class.\r\n\r\nThere is compelling geologic and geochemical evidence that chloride is important for transport of metals, but the porphyry coppers stand out as a class associated with fluids of especially high salinity during at least one stage of their formation. Halite cubes in fluid inclusions are an effective, although rough, indicator of those salinities and can be conveniently monitored during petrographic study of thin sections. Thus, fluid inclusions can be used to characterize favorable intrusions, metal anomalies, and caprocks as an additional method of detecting possible disseminated porphyry copper metallization. The presence of halite-bearing inclusions, especially coexisting with gas-rich inclusions, is considered to be a favorable fluid anomaly in the search for porphyry ore.","language":"ENGLISH","publisher":"U.S. Geological Survey","doi":"10.3133/pp907D","usgsCitation":"Nash, J.T., 1976, Fluid-Inclusion Petrology - Data from Porphyry Copper Deposits and Applications to Exploration: U.S. Geological Survey Professional Paper 907, vi, 16 p., https://doi.org/10.3133/pp907D.","productDescription":"vi, 16 p.","costCenters":[{"id":595,"text":"U.S. Geological Survey","active":false,"usgs":true}],"links":[{"id":117830,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/pp/0907d/report-thumb.jpg"},{"id":33424,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/pp/0907d/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -120,30 ], [ -120,42 ], [ -106,42 ], [ -106,30 ], [ -120,30 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49d6e4b07f02db5de7c7","contributors":{"authors":[{"text":"Nash, J. Thomas","contributorId":26306,"corporation":false,"usgs":true,"family":"Nash","given":"J.","email":"","middleInitial":"Thomas","affiliations":[],"preferred":false,"id":152331,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":5996,"text":"pp960 - 1976 - Statistical studies of selected trace elements with reference to geology and genesis of the Carlin gold deposit, Nevada","interactions":[],"lastModifiedDate":"2014-06-13T08:17:41","indexId":"pp960","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1976","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":331,"text":"Professional Paper","code":"PP","onlineIssn":"2330-7102","printIssn":"1044-9612","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"960","title":"Statistical studies of selected trace elements with reference to geology and genesis of the Carlin gold deposit, Nevada","docAbstract":"Linear regression and discriminant analyses techniques were  \napplied to gold, mercury, arsenic, antimony, barium, copper, \nmolybdenum, lead, zinc, boron, tellurium, selenium, and tungsten \nanalyses from drill holes into unoxidized gold ore at the Carlin gold \nmine near Carlin, Nev. The statistical treatments employed were \nused to judge proposed hypotheses on the origin and geochemical \nparagenesis of this disseminated gold deposit.","language":"English","publisher":"U.S. Government Printing Office","publisherLocation":"Washington, D.C.","doi":"10.3133/pp960","usgsCitation":"Harris, M., and Radtke, A.S., 1976, Statistical studies of selected trace elements with reference to geology and genesis of the Carlin gold deposit, Nevada: U.S. Geological Survey Professional Paper 960, iii, 21 p., https://doi.org/10.3133/pp960.","productDescription":"iii, 21 p.","numberOfPages":"24","costCenters":[],"links":[{"id":140327,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/pp/0960/report-thumb.jpg"},{"id":112688,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/pp/0960/report.pdf","size":"1935","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49dde4b07f02db5e1edf","contributors":{"authors":[{"text":"Harris, Michael","contributorId":96593,"corporation":false,"usgs":true,"family":"Harris","given":"Michael","affiliations":[],"preferred":false,"id":151940,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Radtke, Arthur S.","contributorId":63795,"corporation":false,"usgs":true,"family":"Radtke","given":"Arthur","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":151939,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":19272,"text":"ofr76407 - 1976 - Laboratory manual: mineral X-ray diffraction data retrieval/plot computer program","interactions":[],"lastModifiedDate":"2012-02-02T00:07:33","indexId":"ofr76407","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1976","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":"76-407","title":"Laboratory manual: mineral X-ray diffraction data retrieval/plot computer program","docAbstract":"The Mineral X-Ray Diffraction Data Retrieval/Plot Computer Program--XRDPLT (VanTrump and Hauff, 1976a) is used to retrieve and plot mineral X-ray diffraction data. The program operates on a file of mineral powder diffraction data (VanTrump and Hauff, 1976b) which contains two-theta or 'd' values, and intensities, chemical formula, mineral name, identification number, and mineral group code. XRDPLT is a machine-independent Fortran program which operates in time-sharing mode on a DEC System i0 computer and the Gerber plotter (Evenden, 1974). The program prompts the user to respond from a time-sharing terminal in a conversational format with the required input information. \r\n\r\nThe program offers two major options: retrieval only; retrieval and plot. The first option retrieves mineral names, formulas, and groups from the file by identification number, by the mineral group code (a classification by chemistry or structure), or by searches based on the formula components. For example, it enables the user to search for minerals by major groups (i.e., feldspars, micas, amphiboles, oxides, phosphates, carbonates) by elemental composition (i.e., Fe, Cu, AI, Zn), or by a combination of these (i.e., all copper-bearing arsenates). \r\n\r\nThe second option retrieves as the first, but also plots the retrieved 2-theta and intensity values as diagrammatic X-ray powder patterns on mylar sheets or overlays. These plots can be made using scale combinations compatible with chart recorder diffractograms and 114.59 mm powder camera films. The overlays are then used to separate or sieve out unrelated minerals until unknowns are matched and identified.","language":"ENGLISH","publisher":"U.S. Dept. of the Interior, Geological Survey,","doi":"10.3133/ofr76407","usgsCitation":"Hauff, P.L., and Van Trump, G., 1976, Laboratory manual: mineral X-ray diffraction data retrieval/plot computer program: U.S. Geological Survey Open-File Report 76-407, 55 p. :ill. ;29 cm., https://doi.org/10.3133/ofr76407.","productDescription":"55 p. :ill. ;29 cm.","costCenters":[],"links":[{"id":151300,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1976/0407/report-thumb.jpg"},{"id":48735,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1976/0407/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b27e4b07f02db6b1018","contributors":{"authors":[{"text":"Hauff, Phoebe L.","contributorId":10402,"corporation":false,"usgs":true,"family":"Hauff","given":"Phoebe","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":180596,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Van Trump, George","contributorId":19156,"corporation":false,"usgs":true,"family":"Van Trump","given":"George","email":"","affiliations":[],"preferred":false,"id":180597,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70233426,"text":"70233426 - 1976 - The heat capacities of Calorimetry Conference copper and of muscovite KAl2(AlSi3)O10 (OH)2, pyrophyllite Al2Si4O10(OH)2, and illite K3(Al7Mg)(Si14Al2)O40(OH)8 between 15 and 375 K and their standard entropies at 298.15 K","interactions":[],"lastModifiedDate":"2022-07-20T15:32:40.246918","indexId":"70233426","displayToPublicDate":"1976-11-01T10:17:10","publicationYear":"1976","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"displayTitle":"The heat capacities of Calorimetry Conference copper and of muscovite KAl<sub>2</sub>(AlSi<sub>3</sub>)O<sub>10</sub>(OH)<sub>2</sub>, pyrophyllite Al<sub>2</sub>Si<sub>4</sub>O<sub>10</sub>(OH)<sub>2</sub>, and illite K<sub>3</sub>(Al<sub>7</sub>Mg)(Si<sub>14</sub>Al<sub>2</sub>)O<sub>40</sub>(OH)<sub>8</sub> between 15 and 375 K and their standard entropies at 298.15 K","title":"The heat capacities of Calorimetry Conference copper and of muscovite KAl2(AlSi3)O10 (OH)2, pyrophyllite Al2Si4O10(OH)2, and illite K3(Al7Mg)(Si14Al2)O40(OH)8 between 15 and 375 K and their standard entropies at 298.15 K","docAbstract":"<p>The heat capacities of Calorimetry Conference copper and of muscovite, pyrophyllite, and illite were measured between 15 and 375 K using an adiabatic calorimeter. Tables of the thermodynamic functions <i>C°<sub>p</sub></i>.(<i>H°<sub>T</sub></i> —<i>H°<sub>O</sub></i>)<i>/T</i>, (<i>G°<sub>T</sub> —H°<sub>O</sub></i>)<i>/T</i>, and <i>S°<sub>T</sub> —S°<sub>O</sub></i> are presented for these phases at integral temperatures from 0 to. 370 K. At 298.15 K (25.0°C), <i>S°<sub>T</sub> —S°<sub>O</sub></i> is 33.12±0.06, 287.7±0.6, 239.4±0.4, and 1,104.2±0.6 J/(mol•K) for copper, muscovite, pyrophyllite, and illite, respectively. The operation of a semiautomatic data-acquisition system for calorimetric measurements at low temperatures is also described, together with a description of a miniature calorimeter having a novel closure seal.</p>","language":"English","publisher":"U.S. Geological Survey","usgsCitation":"Robie, R.A., Hemingway, B., and Wilson, W.H., 1976, The heat capacities of Calorimetry Conference copper and of muscovite KAl2(AlSi3)O10 (OH)2, pyrophyllite Al2Si4O10(OH)2, and illite K3(Al7Mg)(Si14Al2)O40(OH)8 between 15 and 375 K and their standard entropies at 298.15 K: Journal of Research of the U.S. Geological Survey, v. 4, no. 6, p. 631-644.","productDescription":"14 p.","startPage":"631","endPage":"644","costCenters":[],"links":[{"id":404120,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":404119,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1976/vol4issue6/report.pdf"}],"volume":"4","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Robie, Richard A.","contributorId":92235,"corporation":false,"usgs":true,"family":"Robie","given":"Richard","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":847078,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hemingway, Bruce S.","contributorId":13689,"corporation":false,"usgs":true,"family":"Hemingway","given":"Bruce S.","affiliations":[],"preferred":false,"id":847079,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wilson, William H.","contributorId":293488,"corporation":false,"usgs":false,"family":"Wilson","given":"William","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":847080,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70231225,"text":"70231225 - 1976 - Evaluation of LANDSAT-1 image applications to geologic mapping, structural analysis and mineral resource inventory of South America with special emphasis on the Andes Mountain region: Type III final report for period January 1973 to July 1974","interactions":[],"lastModifiedDate":"2022-05-03T16:16:48.660074","indexId":"70231225","displayToPublicDate":"1976-06-01T10:45:00","publicationYear":"1976","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":1,"text":"Federal Government Series"},"title":"Evaluation of LANDSAT-1 image applications to geologic mapping, structural analysis and mineral resource inventory of South America with special emphasis on the Andes Mountain region: Type III final report for period January 1973 to July 1974","docAbstract":"<p>The author has identified the following significant results. The discovery of copper mineralization along a lineament mapped in Area 7 (La Paz) has lent credence to the use of LANDSAT 1 data as a basic step in mineral exploration. In Area 9 (Copiapo Region), a number of lineaments were found to be associated with the largest copper deposits of the region. In Area 12 (Magallanes), the identification of what is believed to be a tertiary basin from LANDSAT 1 data has resulted in a new area for petroleum exploration. Band 7 images, as black and white transparencies, were found to be the most useful for geologic interpretation in both tropical vegetated areas and desert regions. Color composites made by the diazochrome process, chromaline process, and from color additive viewers provided additional information. Mosaics of LANDSAT 1 data covering 4 x 6 degrees of latitude and longitude compiled at the 1:1,000,000 scale were found to be an ideal size and format for most users.</p>","language":"English","publisher":"National Aeronautics and Space Administration","usgsCitation":"Carter, W.D., 1976, Evaluation of LANDSAT-1 image applications to geologic mapping, structural analysis and mineral resource inventory of South America with special emphasis on the Andes Mountain region: Type III final report for period January 1973 to July 1974, 115 p.","productDescription":"115 p.","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":400065,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":400063,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://ntrs.nasa.gov/api/citations/19760023539/downloads/19760023539.pdf","size":"10,466 KB","linkFileType":{"id":1,"text":"pdf"}}],"country":"Argentina, Bolivia, Brazil, Chile, Colombia, Peru, Venezuela","city":"Araqua, Belo Horizonte, Copiapo, La Paz, Magallanes, Mendoza, Porto Velho, Santiago, Tucuman","otherGeospatial":"Andes Mountains, Guyana Shield","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -62.99560546875,\n              3.7765593098768635\n            ],\n            [\n              -60.49072265625,\n              3.7765593098768635\n            ],\n            [\n              -60.49072265625,\n              8.47237228290914\n            ],\n            [\n              -62.99560546875,\n              8.47237228290914\n            ],\n            [\n              -62.99560546875,\n              3.7765593098768635\n            ]\n          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             -75.69580078125,\n              -50.93073802371817\n            ],\n            [\n              -75.69580078125,\n              -55.491303628204214\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Carter, William D.","contributorId":64567,"corporation":false,"usgs":true,"family":"Carter","given":"William","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":842089,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70232237,"text":"70232237 - 1976 - Definitive X-ray powder data for covellite, anilite, djurleite, and chalcocite","interactions":[],"lastModifiedDate":"2022-06-16T17:01:35.545243","indexId":"70232237","displayToPublicDate":"1976-03-01T11:19:20","publicationYear":"1976","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"Definitive X-ray powder data for covellite, anilite, djurleite, and chalcocite","docAbstract":"<p>By using the Guinier-Hägg focusing X-ray powder camera with Cr<i>Kα<sub>1</sub></i> and Cu<i>Kα<sub>1</sub></i> radiations, new powder data for covellite (CuS), anilite (Cu<sub>7</sub>S<sub>4</sub>, djurleite (Cu<sub>1.934</sub>S), and low chalcocite (Cu<sub>2</sub>S) have been obtained from synthetic and natural materials. The powder data were treated by least-squares analysis to obtain the best unit-cell parameters consistent with the data. These powder data are intended to replace inferior and incomplete data previously published and to serve as standards for the study of copper sulflde minerals.</p>","language":"English","publisher":"U.S. Geological Survey","usgsCitation":"Potter, R.W., and Evans, H.T., 1976, Definitive X-ray powder data for covellite, anilite, djurleite, and chalcocite: Journal of Research of the U.S. Geological Survey, v. 4, no. 2, p. 205-212.","productDescription":"8 p.","startPage":"205","endPage":"212","costCenters":[],"links":[{"id":402272,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":402271,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1976/vol4issue2/report.pdf"}],"volume":"4","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Potter, Robert W. II","contributorId":67899,"corporation":false,"usgs":true,"family":"Potter","given":"Robert","suffix":"II","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":844765,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Evans, Howard T. Jr.","contributorId":70852,"corporation":false,"usgs":true,"family":"Evans","given":"Howard","suffix":"Jr.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":844766,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70010914,"text":"70010914 - 1976 - Atomic absorption spectrometric determination of copper, zinc, and lead in geological materials","interactions":[],"lastModifiedDate":"2023-03-07T17:21:34.676373","indexId":"70010914","displayToPublicDate":"1976-01-01T00:00:00","publicationYear":"1976","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":760,"text":"Analytica Chimica Acta","active":true,"publicationSubtype":{"id":10}},"title":"Atomic absorption spectrometric determination of copper, zinc, and lead in geological materials","docAbstract":"<p><span>An atomic absorption spectrometric method is described for the determination of copper, zinc, and lead in geological materials. The sample is digested with HF—HCl—H</span><sub>2</sub><span>O</span><sub>2</sub><span>; the final solution for analysis is in 10 % (v/v) HCl. Copper and zinc are determined directly by aspirating the solution into an air—acetylene flame. A separate aliquot of the solution is used for determination of lead; lead is extracted into TOPO-MIBK from the acidic solution in the presence of iodide and ascorbic acid. For a 0.50-g sample, the limits of determination are 10–2000 p.p.m. for Cu and Zn, and 5–5000 p.p.m. for Pb. As much as 40 % Fe or Ca. and 10 % Al, Mg, or Mn in the sample do not interfere. The proposed method can be applied to the determination of copper, zinc, and lead in a wide range of geological materials including iron- and manganese-rich, calcareous and carbonate samples.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/S0003-2670(01)83030-0","usgsCitation":"Sanzolone, R.F., and Chao, T.T., 1976, Atomic absorption spectrometric determination of copper, zinc, and lead in geological materials: Analytica Chimica Acta, v. 86, no. C, p. 163-168, https://doi.org/10.1016/S0003-2670(01)83030-0.","productDescription":"6 p.","startPage":"163","endPage":"168","numberOfPages":"6","costCenters":[],"links":[{"id":221494,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"86","issue":"C","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059eec7e4b0c8380cd49f5a","contributors":{"authors":[{"text":"Sanzolone, R. F.","contributorId":64199,"corporation":false,"usgs":true,"family":"Sanzolone","given":"R.","middleInitial":"F.","affiliations":[],"preferred":false,"id":359887,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Chao, T. T.","contributorId":31900,"corporation":false,"usgs":true,"family":"Chao","given":"T.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":359886,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70010233,"text":"70010233 - 1976 - The California poppy (eschscholtzia mexicana) as a copper indicator plant - A new example","interactions":[],"lastModifiedDate":"2025-03-06T16:15:17.012376","indexId":"70010233","displayToPublicDate":"1976-01-01T00:00:00","publicationYear":"1976","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2302,"text":"Journal of Geochemical Exploration","active":true,"publicationSubtype":{"id":10}},"displayTitle":"The California poppy (<i>eschscholtzia mexicana</i>) as a copper indicator plant - A new example","title":"The California poppy (eschscholtzia mexicana) as a copper indicator plant - A new example","docAbstract":"<p><span>The abundance and distribution of the California poppy&nbsp;</span><i>(Eschscholtzia mexicana)</i><span>&nbsp;correlates closely with the copper-rich outcrop of a small porphyry-type deposit in Arizona. Chemical factors are probably more important than physical factors in determining why this species is sometimes found as a copper indicator plant.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/0375-6742(76)90035-2","issn":"03756742","usgsCitation":"Chaffee, M., and Gale, C., 1976, The California poppy (eschscholtzia mexicana) as a copper indicator plant - A new example: Journal of Geochemical Exploration, v. 5, no. 1-2, p. 59-63, https://doi.org/10.1016/0375-6742(76)90035-2.","productDescription":"5 p.","startPage":"59","endPage":"63","numberOfPages":"5","costCenters":[],"links":[{"id":219435,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"5","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505baa00e4b08c986b32266d","contributors":{"authors":[{"text":"Chaffee, M.A.","contributorId":108049,"corporation":false,"usgs":true,"family":"Chaffee","given":"M.A.","affiliations":[],"preferred":false,"id":358380,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gale, C.W. III","contributorId":32673,"corporation":false,"usgs":true,"family":"Gale","given":"C.W.","suffix":"III","email":"","affiliations":[],"preferred":false,"id":358379,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70009760,"text":"70009760 - 1976 - The zonal distribution of selected elements above the Kalamazoo porphyry copper deposit, San Manuel district, Pinal County, Arizona","interactions":[],"lastModifiedDate":"2025-03-06T16:17:59.099985","indexId":"70009760","displayToPublicDate":"1976-01-01T00:00:00","publicationYear":"1976","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2302,"text":"Journal of Geochemical Exploration","active":true,"publicationSubtype":{"id":10}},"title":"The zonal distribution of selected elements above the Kalamazoo porphyry copper deposit, San Manuel district, Pinal County, Arizona","docAbstract":"<div class=\"u-margin-s-bottom\">There may be many as-yet-undiscovered porphyry copper deposits that exist as blind deposits deep within exposed rock bodies. The Kalamazoo porphyry copper-molybdenum deposit is a blind deposit present at depths up to at least 1,000 m (about 3,200 ft) that contains zoning features common to many of the known porphyry copper deposits found in western North and South America.</div><div class=\"u-margin-s-bottom\">As the preliminary phase in a geochemical study of the Kalamazoo deposit, whole-rock samples of core and cuttings from two drill holes have been analyzed for 60 different elements. Each hole represents a different major rock unit and each has penetrated completely through all the existing alteration zones and the ore zone.</div><div class=\"u-margin-s-bottom\">Plots of concentration vs. depth for 17 selected elements show distinct high- or low-concentration zones that are spatially related to the ore zone. For most of the ore-related elements no significant correlation with the two lithologies is apparent. The spatial distribution and abundance of elements such as Co, Cu, S, Se, Mn, Tl, Rb, Zn, B, and Li may be useful in determining the direction for exploration to proceed to locate a blind deposit. Trace element studies should be valuable in evaluating areas containing extensive outcrops of rocks with disseminated pyrite. Elemental zoning should be at least as useful as alteration-mineralization zoning for evaluating rock bodies thought to contain blind deposits similar to the Kalamazoo deposit.</div>","language":"English","publisher":"Elsevier","doi":"10.1016/0375-6742(76)90042-X","issn":"03756742","usgsCitation":"Chaffee, M., 1976, The zonal distribution of selected elements above the Kalamazoo porphyry copper deposit, San Manuel district, Pinal County, Arizona: Journal of Geochemical Exploration, v. 5, no. 1-2, p. 145-165, https://doi.org/10.1016/0375-6742(76)90042-X.","productDescription":"21 p.","startPage":"145","endPage":"165","numberOfPages":"21","costCenters":[],"links":[{"id":219266,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"5","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb1efe4b08c986b3254c9","contributors":{"authors":[{"text":"Chaffee, M.A.","contributorId":108049,"corporation":false,"usgs":true,"family":"Chaffee","given":"M.A.","affiliations":[],"preferred":false,"id":357077,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":17349,"text":"ofr75654 - 1975 - Mineral deposits in western Saudi Arabia; a preliminary report","interactions":[],"lastModifiedDate":"2015-09-22T19:26:58","indexId":"ofr75654","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1975","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":"75-654","title":"Mineral deposits in western Saudi Arabia; a preliminary report","docAbstract":"<p>Mineral deposits in Saudi Arabia include a variety of deposits which were formed in many geologic environments. These include magmatic and late magmatic deposits in igneous masses, contact metamorphic deposits along the margins of igneous bodies, and stratiform sulfide deposits and veins. Notable deposits of sedimentary origin include deposits of iron oxides and phosphate.</p>\n<p>Strata-bound massive sulfide deposits containing copper, zinc, and nickel sulfides associated with pyrite and pyrrhotite in complexly deformed volcanic rocks in Saudi Arabia have been the subject of controversy. They are considered by some geologists to be of syngenetic or volcanogenic origin, and by others to be epigenetic.</p>\n<p>The principal mineral deposits in western Saudi Arabia are localized in mineral belts within tectonic zones that trend northerly, northeasterly, and northwesterly. These belts contain the exploration target areas most promising for future exploration. Noteworthy among these are: 1) the northerly-trending Bidah copper-zinc belt; 2) the Sayid copper-zinc zone; 3) the northwest-trending Nuqrah copper zinc-silver belt; and 4) the north-northwesterly-trending Al Amar belt. Gold and silver deposits are mainly localized in north-trending structural features of the Hijaz geotectonic cycle and northwest Najd trends.</p>\n<p>Saudi Arabian metal deposits known thus far contain reserves in the 2 billion dollar range. Further exploration should result in discoveries that could significantly increase this amount; Saudi Arabia may well have workable metallic and nonmetallic mineral resources for industrial developments in many parts of the Kingdom.</p>\n<p>In order to effectively carry on a search for new mineral deposits, the belts should be mapped in detail, with emphasis on the delineation of stratigraphic and structural features that control metallization. In addition, geochemical and geophysical studies should be made of promising areas to outline exploration targets. These targets could then be systematically explored.</p>","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr75654","usgsCitation":"Roberts, R.J., Greenwood, W., Worl, R., Dodge, F.C., and Kiilsgaard, T.H., 1975, Mineral deposits in western Saudi Arabia; a preliminary report: U.S. Geological Survey Open-File Report 75-654, Report: iii, 60 p.; Map: 28 cm., https://doi.org/10.3133/ofr75654.","productDescription":"Report: iii, 60 p.; Map: 28 cm.","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":46482,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1975/0654/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":46483,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1975/0654/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":149958,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1975/0654/report-thumb.jpg"}],"country":"Saudi Arabia","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              35.5,\n              31\n            ],\n            [\n              45,\n              28\n            ],\n            [\n              48,\n              16\n            ],\n            [\n              41,\n              16\n            ],\n            [\n              35.5,\n              31\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a61e4b07f02db635998","contributors":{"authors":[{"text":"Roberts, Ralph Jackson","contributorId":63010,"corporation":false,"usgs":true,"family":"Roberts","given":"Ralph","email":"","middleInitial":"Jackson","affiliations":[],"preferred":false,"id":176020,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Greenwood, William R.","contributorId":53789,"corporation":false,"usgs":true,"family":"Greenwood","given":"William R.","affiliations":[],"preferred":false,"id":176019,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Worl, Ronald G.","contributorId":87143,"corporation":false,"usgs":true,"family":"Worl","given":"Ronald G.","affiliations":[],"preferred":false,"id":176018,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Dodge, F. C. W.","contributorId":18755,"corporation":false,"usgs":true,"family":"Dodge","given":"F.","email":"","middleInitial":"C. W.","affiliations":[],"preferred":false,"id":176021,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Kiilsgaard, Thor H.","contributorId":68738,"corporation":false,"usgs":true,"family":"Kiilsgaard","given":"Thor","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":176022,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":16582,"text":"ofr7570 - 1975 - A mineralogical study of the Guanajuato, Mexico, silver ores","interactions":[],"lastModifiedDate":"2025-07-14T14:46:56.248662","indexId":"ofr7570","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1975","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":"75-70","title":"A mineralogical study of the Guanajuato, Mexico, silver ores","docAbstract":"<p>The silver-gold ores now being worked in the Guanajuato, Mexico, mining district consist chiefly of argentite and native gold-silver, with minor amounts of polybasite, pyrargyrite, and some argyrodite, a silver germanium sulfide. With these are always associated galena, sphalerite, chalcopyrite, pyrite, and minor amounts of marcasite. The gangue is generally a breccia of various rock types, mostly volcanics, cemented by calcite that has been largely replaced by quartz. The quarts is often amethystine, and is the carrier of the metallic minerals. The breccia fragments are pyritized, but not markedly mineralized otherwise; most of the ore minerals are in the quarzitic cementing materials; however, relatively large crystals of the complex sulphosalts appear to be younger than, i.e., deposited on, the quarts crystals in vugs.</p><p>The mineralization is not of the banded-vein type, but consists of discrete ore particles in patches and streaks in the quarts. In general there is no,clear indication that any of the base-metal sulfides are in a definite age sequence; there is evidence of argentite replacing galena, as well as the other sulfides.</p><p>There are local variations in the gangue - a soapstone (\"jabon\") is worked locally, and also a porous leached (?) siliceous rock (\"charasco\"). The character of the mineralisation, however, is essentially constant throughout the area studied, and in particular no significant variation was noted in the several vein systems.</p><p>Investigation of gas-liquid inclusions in the quartz suggests that the ores were deposited at about 254°C and, therefore, that the mineralization is hydrothermal.</p><p>Possible recovery of the base-metal content of the ore is considered; it is computed that several hundred thousand dollars worth of copper, zinc, and lead is mined and milled annually, and discarded as tailings and/or slag. This with similar waste from not-too remote mining districts might be processed at some central point for profitable recovery. Hitherto unrecognized germanium is also present, but in the absence of a cheap and reliable method of estimating small percentages of this metal, it is not likely that germanium can be produced economically.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr7570","usgsCitation":"Wilson, I.F., Milton, C., and Houston, J.R., 1975, A mineralogical study of the Guanajuato, Mexico, silver ores: U.S. Geological Survey Open-File Report 75-70, 157 p., https://doi.org/10.3133/ofr7570.","productDescription":"157 p.","costCenters":[],"links":[{"id":492201,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1975/0070/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":148455,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1975/0070/report-thumb.jpg"}],"country":"Mexico","state":"Guanajuato","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -103.07143132538243,\n              22.06160830209653\n            ],\n            [\n              -103.07143132538243,\n              19.796004819064265\n            ],\n            [\n              -99.39564170640034,\n              19.796004819064265\n            ],\n            [\n              -99.39564170640034,\n              22.06160830209653\n            ],\n            [\n              -103.07143132538243,\n              22.06160830209653\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b23e4b07f02db6adfc9","contributors":{"authors":[{"text":"Wilson, Ivan Franklin","contributorId":103724,"corporation":false,"usgs":true,"family":"Wilson","given":"Ivan","email":"","middleInitial":"Franklin","affiliations":[],"preferred":false,"id":173107,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Milton, Charles","contributorId":13616,"corporation":false,"usgs":true,"family":"Milton","given":"Charles","email":"","affiliations":[],"preferred":false,"id":173105,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Houston, Joseph Rollins","contributorId":44239,"corporation":false,"usgs":true,"family":"Houston","given":"Joseph","email":"","middleInitial":"Rollins","affiliations":[],"preferred":false,"id":173106,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":16521,"text":"ofr75162 - 1975 - Copper, lead, zinc, antimony, and arsenic in Pakistan","interactions":[],"lastModifiedDate":"2012-02-02T00:07:17","indexId":"ofr75162","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1975","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":"75-162","title":"Copper, lead, zinc, antimony, and arsenic in Pakistan","docAbstract":"Copper localities that merit geological investigation are found in the western Chasai District, in North Waziristan Agency, and in the Salt Range in Mianwali and Sargodha Districts. No high-grade deposits have been .reported from these ,areas and if deposits are developed they will likely be low-grade, high-tonnage, disseminated deposits. Those localities reported from Chitral State are too remote and inaccessible to be of interest now. All lead localities found to date are of minor importance; there has been small production at one .locality in Chasai District and in the southern part of the Hazara District. Zinc, antimony, and arsenic are sparse in Pakistan and no important localities of these metals are reported.","language":"ENGLISH","publisher":"U.S. Geological Survey,","doi":"10.3133/ofr75162","usgsCitation":"White, M.G., 1975, Copper, lead, zinc, antimony, and arsenic in Pakistan: U.S. Geological Survey Open-File Report 75-162, 1 sheet (39 p.) :maps ;10 x 15 cm., https://doi.org/10.3133/ofr75162.","productDescription":"1 sheet (39 p.) :maps ;10 x 15 cm.","costCenters":[],"links":[{"id":150276,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1975/0162/report-thumb.jpg"},{"id":45501,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1975/0162/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":45502,"rank":401,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1975/0162/plate-2.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":45503,"rank":402,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1975/0162/plate-3.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":45504,"rank":403,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1975/0162/plate-4.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":45505,"rank":404,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1975/0162/plate-5.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":45506,"rank":405,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1975/0162/plate-6.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":45507,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1975/0162/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4adbe4b07f02db6859f4","contributors":{"authors":[{"text":"White, Max Gregg","contributorId":91841,"corporation":false,"usgs":true,"family":"White","given":"Max","email":"","middleInitial":"Gregg","affiliations":[],"preferred":false,"id":172987,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":16237,"text":"ofr75593 - 1975 - Petrochemistry of skarn in the Copper Canyon porphyry copper deposits, Lander County, Nevada","interactions":[],"lastModifiedDate":"2012-02-02T00:07:05","indexId":"ofr75593","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1975","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":"75-593","title":"Petrochemistry of skarn in the Copper Canyon porphyry copper deposits, Lander County, Nevada","language":"ENGLISH","publisher":"U.S. Geological Survey,","doi":"10.3133/ofr75593","usgsCitation":"Theodore, T., and Blake, D.W., 1975, Petrochemistry of skarn in the Copper Canyon porphyry copper deposits, Lander County, Nevada: U.S. Geological Survey Open-File Report 75-593, 14 leaves :ill., maps ;27 cm., https://doi.org/10.3133/ofr75593.","productDescription":"14 leaves :ill., maps ;27 cm.","costCenters":[],"links":[{"id":148898,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ae0e4b07f02db6881e7","contributors":{"authors":[{"text":"Theodore, Ted G.","contributorId":57840,"corporation":false,"usgs":true,"family":"Theodore","given":"Ted G.","affiliations":[],"preferred":false,"id":172470,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Blake, David W.","contributorId":49229,"corporation":false,"usgs":true,"family":"Blake","given":"David","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":172469,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":16102,"text":"ofr75163 - 1975 - Geochemical prospecting for copper and nickel in the Wulgai and Tor Tangi areas southeast of Hindubagh, Quetta Division, Pakistan","interactions":[],"lastModifiedDate":"2012-02-02T00:07:14","indexId":"ofr75163","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1975","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":"75-163","title":"Geochemical prospecting for copper and nickel in the Wulgai and Tor Tangi areas southeast of Hindubagh, Quetta Division, Pakistan","docAbstract":"Showings of magnetite, copper, and possible nickel mineralization in the Hindubagh chromite mining district are near Wulgai and Tor Tangi. Several hundred samples of clastic material from dry streambeds in these areas were sieved for the minus-80-mesh fraction and analyzed for copper using 2, 2'-biquinoline and for nickel using alpha-furildioxime. The copper threshold is 75 ppm, and the nickel threshold is 400 ppm. A geochemical map has been prepared that shows nine areas of anomalously high copper and six areas of high nickel. The nickel anomalies may represent secondary dispersion patterns derived from the erosion of nickeliferous ultramafic rocks of the Hindubagh intrusive complex. Copper showings in and near four of the anomalous copper areas indicate that detailed geological investigation and detailed geochemical sampling of rocks, soil, and unconsolidated clastic material are required to determine the source of the anomalies.","language":"ENGLISH","publisher":"s.n.],","doi":"10.3133/ofr75163","usgsCitation":"Stanin, S.A., Wahid, M., and Khan, S., 1975, Geochemical prospecting for copper and nickel in the Wulgai and Tor Tangi areas southeast of Hindubagh, Quetta Division, Pakistan: U.S. Geological Survey Open-File Report 75-163, i, 9 leaves, 1 sheet, :ill., maps (some folded) ;27 cm., https://doi.org/10.3133/ofr75163.","productDescription":"i, 9 leaves, 1 sheet, :ill., maps (some folded) ;27 cm.","costCenters":[],"links":[{"id":149096,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1975/0163/report-thumb.jpg"},{"id":45026,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1975/0163/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":45027,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1975/0163/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b23e4b07f02db6aded9","contributors":{"authors":[{"text":"Stanin, S. Anthony","contributorId":57853,"corporation":false,"usgs":true,"family":"Stanin","given":"S.","email":"","middleInitial":"Anthony","affiliations":[],"preferred":false,"id":172237,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wahid, M.A.","contributorId":44168,"corporation":false,"usgs":true,"family":"Wahid","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":172236,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Khan, Shamsher","contributorId":86785,"corporation":false,"usgs":true,"family":"Khan","given":"Shamsher","email":"","affiliations":[],"preferred":false,"id":172238,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":64510,"text":"i882 - 1975 - Map showing anomalous distribution of molybdenum, copper, and zinc in stream-sediment concentrates from the Sierra Cuchillo-Animas uplifts and adjacent areas, southwestern New Mexico","interactions":[],"lastModifiedDate":"2025-08-13T20:06:45.420411","indexId":"i882","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1975","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":320,"text":"IMAP","code":"I","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"882","title":"Map showing anomalous distribution of molybdenum, copper, and zinc in stream-sediment concentrates from the Sierra Cuchillo-Animas uplifts and adjacent areas, southwestern New Mexico","docAbstract":"<p>No abstract available.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/i882","usgsCitation":"Alminas, H.V., Watts, K.C., Griffits, W.R., Siems, D.L., Kraxberger, V.E., and Curry, K.J., 1975, Map showing anomalous distribution of molybdenum, copper, and zinc in stream-sediment concentrates from the Sierra Cuchillo-Animas uplifts and adjacent areas, southwestern New Mexico: U.S. Geological Survey IMAP 882, 2 Plates: 29.87 x 49.78 inches and 30.99 x 38.40 inches, https://doi.org/10.3133/i882.","productDescription":"2 Plates: 29.87 x 49.78 inches and 30.99 x 38.40 inches","costCenters":[],"links":[{"id":254990,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/imap/0882/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":254991,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/imap/0882/report-thumb.jpg"},{"id":254988,"rank":3,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/imap/0882/plate-1_north.pdf","text":"North half","linkFileType":{"id":1,"text":"pdf"}},{"id":254989,"rank":4,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/imap/0882/plate-1_south.pdf","text":"South half","linkFileType":{"id":1,"text":"pdf"}},{"id":494060,"rank":5,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_9782.htm","linkFileType":{"id":5,"text":"html"}}],"scale":"48000","country":"United States","state":"New Mexico","otherGeospatial":"Sierra Cuchillo-Animas uplifts and adjacent areas","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -107.75,\n              33.625\n            ],\n            [\n              -107.75,\n              32.75\n            ],\n            [\n              -107.375,\n              32.75\n            ],\n            [\n              -107.375,\n              33.625\n            ],\n            [\n              -107.75,\n              33.625\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a94e4b07f02db658fdf","contributors":{"authors":[{"text":"Alminas, H. V.","contributorId":83926,"corporation":false,"usgs":true,"family":"Alminas","given":"H.","email":"","middleInitial":"V.","affiliations":[],"preferred":false,"id":271138,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Watts, K. C.","contributorId":49344,"corporation":false,"usgs":true,"family":"Watts","given":"K.","middleInitial":"C.","affiliations":[],"preferred":false,"id":271136,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Griffits, W. R.","contributorId":21564,"corporation":false,"usgs":true,"family":"Griffits","given":"W.","middleInitial":"R.","affiliations":[],"preferred":false,"id":271134,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Siems, D. L.","contributorId":15701,"corporation":false,"usgs":true,"family":"Siems","given":"D.","middleInitial":"L.","affiliations":[],"preferred":false,"id":271133,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Kraxberger, V. E.","contributorId":27138,"corporation":false,"usgs":true,"family":"Kraxberger","given":"V.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":271135,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Curry, K. J.","contributorId":57468,"corporation":false,"usgs":true,"family":"Curry","given":"K.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":271137,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":15841,"text":"ofr7518 - 1975 - Exploration for porphyry copper deposits in Pakistan using digital processing of ERTS-1 data","interactions":[{"subject":{"id":15841,"text":"ofr7518 - 1975 - Exploration for porphyry copper deposits in Pakistan using digital processing of ERTS-1 data","indexId":"ofr7518","publicationYear":"1975","noYear":false,"title":"Exploration for porphyry copper deposits in Pakistan using digital processing of ERTS-1 data"},"predicate":"SUPERSEDED_BY","object":{"id":70042814,"text":"70042814 - 1976 - Exploration for porphyry copper deposits in Pakistan using digital processing of Landsat-1 data","indexId":"70042814","publicationYear":"1976","noYear":false,"title":"Exploration for porphyry copper deposits in Pakistan using digital processing of Landsat-1 data"},"id":1}],"supersededBy":{"id":70042814,"text":"70042814 - 1976 - Exploration for porphyry copper deposits in Pakistan using digital processing of Landsat-1 data","indexId":"70042814","publicationYear":"1976","noYear":false,"title":"Exploration for porphyry copper deposits in Pakistan using digital processing of Landsat-1 data"},"lastModifiedDate":"2013-01-24T14:09:54","indexId":"ofr7518","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1975","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":"75-18","title":"Exploration for porphyry copper deposits in Pakistan using digital processing of ERTS-1 data","language":"ENGLISH","publisher":"U.S. Geological Survey,","publisherLocation":"Reston, VA","doi":"10.3133/ofr7518","usgsCitation":"Schmidt, R.G., 1975, Exploration for porphyry copper deposits in Pakistan using digital processing of ERTS-1 data: U.S. Geological Survey Open-File Report 75-18, 29 leaves :maps (some folded) ;29 cm.; (26 p. - PGS), https://doi.org/10.3133/ofr7518.","productDescription":"29 leaves :maps (some folded) ;29 cm.; (26 p. - PGS)","costCenters":[],"links":[{"id":150299,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"}],"country":"Pakistan","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 60.87,23.54 ], [ 60.87,37.06 ], [ 77.82,37.06 ], [ 77.82,23.54 ], [ 60.87,23.54 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a06e4b07f02db5f8e35","contributors":{"authors":[{"text":"Schmidt, Robert George","contributorId":36908,"corporation":false,"usgs":true,"family":"Schmidt","given":"Robert","email":"","middleInitial":"George","affiliations":[],"preferred":false,"id":171825,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":60211,"text":"mf655B - 1975 - Geochemical and generalized geologic map showing distribution and abundance of copper in the Nabesna Quadrangle, Alaska","interactions":[],"lastModifiedDate":"2012-02-10T00:10:26","indexId":"mf655B","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1975","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":"655","chapter":"B","title":"Geochemical and generalized geologic map showing distribution and abundance of copper in the Nabesna Quadrangle, Alaska","language":"ENGLISH","doi":"10.3133/mf655B","usgsCitation":"Marsh, S., 1975, Geochemical and generalized geologic map showing distribution and abundance of copper in the Nabesna Quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map 655, 1 map., https://doi.org/10.3133/mf655B.","productDescription":"1 map.","costCenters":[],"links":[{"id":104213,"rank":700,"type":{"id":15,"text":"Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_3771.htm","linkFileType":{"id":5,"text":"html"},"description":"3771"},{"id":182655,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"}],"scale":"0","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -144,62 ], [ -144,63 ], [ -141,63 ], [ -141,62 ], [ -144,62 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b24e4b07f02db6ae851","contributors":{"authors":[{"text":"Marsh, S.P.","contributorId":32913,"corporation":false,"usgs":true,"family":"Marsh","given":"S.P.","email":"","affiliations":[],"preferred":false,"id":263325,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
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