{"pageNumber":"147","pageRowStart":"3650","pageSize":"25","recordCount":4111,"records":[{"id":18056,"text":"ofr83826 - 1983 - A surface vitrinite reflectance anomaly related to Bell Creek oil field, Montana, U.S.A.","interactions":[],"lastModifiedDate":"2012-02-02T00:07:20","indexId":"ofr83826","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1983","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":"83-826","title":"A surface vitrinite reflectance anomaly related to Bell Creek oil field, Montana, U.S.A.","docAbstract":"Vitrinite reflectance measurements from surface samples of mudrock and coal show anomalously high values over the Bell Creek oil field. The average vitrinite reflectance (Rm) increases to a maximum of 0.9 percent over the field against background values of about 0.3 percent. The Rm anomaly coincides with a geochemical anomaly indicated by diagenetic magnetite in surface rocks and a geobiologic anomaly indicated by ethane-consuming bacteria. These samples were taken from the Upper Cretaceous Hell Creek and Paleocene Fort Union Formations which form an essentially conformable sequence. The depositional environment is similar in both formations, and we expect little variation in the source and composition of the organic matter. The surface R m should be approximately constant because of a uniform thermal history across the field. Temperature studies over local oil fields with similar geology suggest the expected thermal anomaly would be less than 10?C (50?F), which is too small to account for the significantly higher rank over the field. Coal clinkers are rare in the vicinity of Bell Creek and an Rm anomaly caused by burning of the thin, discontinuous coal seams is unlikely. The limited topographic relief, less than 305 m (1,000 ft), over the shallow-dipping homoclinal structure and the poor correlation between Rm and sample locality elevation (r = -0.2) indicate that the Rm anomaly is not due to burial, deformation and subsequent erosion.\r\n\r\nWe conjecture that activity by petroleum-metabolizing bacteria is a possible explanation of the Rm anomaly. Microseepage from oil reservoirs supports large colonies of these organisms, some of which can produce enzymes that can cleave hydrocarbon side-chains on the kerogen molecule. The loss of these side chains causes condensation of the ring structures (Stach and others, 1982) and consequently increases its reflectance. \r\n\r\nThese data indicate that vitrinite reflectance may be a useful tool to explore for stratigraphic traps in the Powder River Basin. Further, the large variation of R across the Bell Creek area suggests that vitrinite reflectance data from surface samples should be interpreted with caution.","language":"ENGLISH","publisher":"U.S. Geological Survey,","doi":"10.3133/ofr83826","usgsCitation":"Barker, C., Dalziel, M., and Pawlewicz, M., 1983, A surface vitrinite reflectance anomaly related to Bell Creek oil field, Montana, U.S.A.: U.S. Geological Survey Open-File Report 83-826, i, 19 p. :ill., maps ;28 cm., https://doi.org/10.3133/ofr83826.","productDescription":"i, 19 p. :ill., maps ;28 cm.","costCenters":[],"links":[{"id":149943,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1983/0826/report-thumb.jpg"},{"id":47409,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1983/0826/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b17e4b07f02db6a5ef8","contributors":{"authors":[{"text":"Barker, C.E.","contributorId":69991,"corporation":false,"usgs":true,"family":"Barker","given":"C.E.","affiliations":[],"preferred":false,"id":178454,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dalziel, M.C.","contributorId":85964,"corporation":false,"usgs":true,"family":"Dalziel","given":"M.C.","email":"","affiliations":[],"preferred":false,"id":178456,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Pawlewicz, M. J.","contributorId":75111,"corporation":false,"usgs":true,"family":"Pawlewicz","given":"M. J.","affiliations":[],"preferred":false,"id":178455,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":60251,"text":"mf1538 - 1983 - Map showing distribution of small-scale deformation structures in a part of the upper coastal plain of South Carolina and adjacent Georgia","interactions":[],"lastModifiedDate":"2016-08-22T15:37:48","indexId":"mf1538","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1983","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":"1538","title":"Map showing distribution of small-scale deformation structures in a part of the upper coastal plain of South Carolina and adjacent Georgia","docAbstract":"

As a contribution to the assessment of neotectonics in the area of the Upper Coastal Plain of South Carolina, field traverses were made between Columbia, S.C., and Augusta, Ga., in 1975 and early 1976 in order to locate and describe small-scale deformation structures within exposed Coastal Plain rocks. The study covered most of the area between the Fall Line (northwest margin of the Coastal Plain) and the Orangeburg (Citronelle) escarpment (fig. 1).

\n

Fieldwork was done principally by vehicle along roads, but also included railroad cuts and excavation sites, such as quarries and landfills. Natural exposures are rare and provided no examples of deformation structures for this study. The geologic units exposed in the area are chiefly clastic sediments deposited in nearshore marine to continental environments. They include semi-consolidated sand, silt, clay, and rare thin impure limestone beds of Late Cretaceous to Eocene age (fig. 2). These sedimentary beds generally have a gentle regional dip to the southeast (Faye and Prowell, 1982, p. 6).

","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/mf1538","usgsCitation":"McDowell, R., and Houser, B.B., 1983, Map showing distribution of small-scale deformation structures in a part of the upper coastal plain of South Carolina and adjacent Georgia: U.S. Geological Survey Miscellaneous Field Studies Map 1538, Plate: 30.15 x 45.16 inches, https://doi.org/10.3133/mf1538.","productDescription":"Plate: 30.15 x 45.16 inches","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":326380,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/mf1538.JPG"},{"id":327341,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/mf/1538/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}}],"scale":"0","country":"United States","state":"Georgia, South Carolina","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -82,33 ], [ -82,34 ], [ -81,34 ], [ -81,33 ], [ -82,33 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a9fe4b07f02db660fa5","contributors":{"authors":[{"text":"McDowell, R. C.","contributorId":30206,"corporation":false,"usgs":true,"family":"McDowell","given":"R. C.","affiliations":[],"preferred":false,"id":263389,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Houser, B. B.","contributorId":46092,"corporation":false,"usgs":true,"family":"Houser","given":"B.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":263390,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":58553,"text":"mf1344D - 1983 - Maps showing the distribution and relationships of selected metals in heavy-mineral concentrates of the Hells Hole Further Planning Area (RARE II), Greenlee County, Arizona, and Grant County, New Mexico","interactions":[],"lastModifiedDate":"2018-10-22T14:25:04","indexId":"mf1344D","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1983","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":"1344","chapter":"D","title":"Maps showing the distribution and relationships of selected metals in heavy-mineral concentrates of the Hells Hole Further Planning Area (RARE II), Greenlee County, Arizona, and Grant County, New Mexico","docAbstract":"

The Wilderness Act (Public Law 99-577, Sept. 3, 1964) and related acts require the U.S. Geological Survey and the U.S. Bureau of Mines to survey certain areas on Federal lands to determine their mineral resource potential.  Results must be made available to the public and be submitted to the President and the Congress.  This report presents the results of a geochemical survey of the Hells Hole Further Planning Area (RARE II) in the Apache National Forest, Greenlee County, Ariz. and the Gila National Forest, Grant County, N. Mex.  The Hells Hole Further Planning Area (03138) was classified as a proposed wilderness and further planning area during the Second Roadless Area Review and Evaluation (RARE II) by the U.S. Forest Service, January 1979.

","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/mf1344D","isbn":"0607809140","usgsCitation":"Hassemer, J., Watts, K.C., Forn, C., and Mosier, E.L., 1983, Maps showing the distribution and relationships of selected metals in heavy-mineral concentrates of the Hells Hole Further Planning Area (RARE II), Greenlee County, Arizona, and Grant County, New Mexico: U.S. Geological Survey Miscellaneous Field Studies Map 1344, 46.41 x 33.99 inches, https://doi.org/10.3133/mf1344D.","productDescription":"46.41 x 33.99 inches","costCenters":[],"links":[{"id":358637,"rank":2,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/mf/1344-D/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":181557,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/mf/1344-D/report-thumb.jpg"}],"scale":"100000","country":"United States","state":"Arizona, New Mexico","county":"Grant County, Greenlee County","otherGeospatial":"Hells Hole Further Planning Area ","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -109.11749999999999,32.867222222222225 ], [ -109.11749999999999,33.11694444444444 ], [ -108.95055555555555,33.11694444444444 ], [ -108.95055555555555,32.867222222222225 ], [ -109.11749999999999,32.867222222222225 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a19e4b07f02db6061cc","contributors":{"authors":[{"text":"Hassemer, J.R.","contributorId":18761,"corporation":false,"usgs":true,"family":"Hassemer","given":"J.R.","affiliations":[],"preferred":false,"id":259730,"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":259732,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Forn, C.L.","contributorId":46935,"corporation":false,"usgs":true,"family":"Forn","given":"C.L.","affiliations":[],"preferred":false,"id":259731,"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":259733,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":48818,"text":"ofr83332 - 1983 - Reconnaissance geologic map of the Harrat Tuffil Quadrangle, sheet 20/39 B, Kingdom of Saudi Arabia","interactions":[],"lastModifiedDate":"2015-12-11T14:00:30","indexId":"ofr83332","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1983","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":"83-332","title":"Reconnaissance geologic map of the Harrat Tuffil Quadrangle, sheet 20/39 B, Kingdom of Saudi Arabia","docAbstract":"

The Harrat Tuffil quadrangle, sheet 20/39 B, is located between lat 20°30’ and 21°00’ N. and long 39°30’ and 40°00’ E. about 50 km southeast of Jiddah. A western belt of Proterozoic metapelites and related rocks, defined as the Sa’diyah formation, structurally underlies and locally is interlayered with Proterozoic metabasaltic rocks of oceanic chemical affinity to the east. The Sa’diyah formation and the metabasaltic rocks are tentatively correlated with the Sabya formation and Baish group. These rocks may represent a miogeosynclinal tectonic setting in the 800 to 850 Ma period of development of the southwestern Arabian Shield. The presence of aluminous metasediments suggest a continental source area, probably west of oceanic and (or) immature island-arc rocks of the Baish(?) igneous suite.

\n

The Sa’diyah formation and metabasaltic rocks are intruded by a granite gneiss batholith, probably about 600 Ma old, and by small plutons of granodiorite and syenogranite. Peraluminous monzogranite occurs within the western part of the Sa’diyah formation belt and may provide an alternate source for the aluminous politic rocks.

\n

Tentative correlation of an isolated exposure of Jurassic(?) dolomite with the Hanifa Formation significantly extends the areal range of possible Jurassic sedimentary rocks in the Tihamat province.

\n

An intense dike swarm intrudes all of the pre-Miocene rocks in the quadrangle. This Damm dike complex is named for Wadi ad Damm. Dike chemistry shows both subalkaline and alkaline bimodal suites. The Sita formation is broadly coeval with the Damm Dike complex and contains volcanic rocks with similar bimodal chemistry. The Sita formation conformably overlies and is locally interbedded with the Sumaysi formation, which is palynologically dated in the Makkah quadrangle as Eocene (~50 Ma).  Potassium-argon dating indicated intrusion and volcanism over the period ~50Ma to ~20 Ma ago. The Tertiary volcanic, hypabyssal, and plutonic rocks are all light rare-earth element enriched as would be expected in a rift-related tectonic setting. These rocks represent proto-Red Sea igneous activity and are correlated with the Jizan group. Shama rhyolite near Harrat Tuffil is unconformably overlain by a boulder conglomerate correlated with the Bathan formation.

\n

Miocene alkali basalt forms a large paleovalley-fill lava flow at Harrat ad Damm and small flow remnants north of Jabal Sita. Erosional downcutting at Harrat ad Damm averaged ~10 m per MA over the past 11 Ma. Pliocene alkali basalt unconformably overlies Bathan formation and Shama rhyolite at Harrat Tuffil.

\n

The uplift of Quaternary reef limestone along the Red Sea coast indicates recent faulting as shown in the adjoining Shu’ayba and Al Ghalah quadrangles.

\n

A perlite deposit at Jabal Shama may be suitable as light aggregate for concrete. Sparse barite veins were discovered in the lower Shumaysi formation. Relatively small deposits of Sa’diyah formation marble may be of interest for local use in building or cement. The Jurassic dolomite is locally quite pure and may have economic applications.

","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr83332","collaboration":"Prepared by the US Geological Survey for the Kingdom of Saudi Arabia, Ministry of Petroleum and Mineral Resources, Deputy Ministry for Mineral Resources","usgsCitation":"Pallister, J.S., 1983, Reconnaissance geologic map of the Harrat Tuffil Quadrangle, sheet 20/39 B, Kingdom of Saudi Arabia: U.S. Geological Survey Open-File Report 83-332, 3 Plates: 36.90 x 31.24 inches or smaller, https://doi.org/10.3133/ofr83332.","productDescription":"3 Plates: 36.90 x 31.24 inches or smaller","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":162401,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":85640,"rank":401,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1983/0332/plate-2.pdf","text":"Plate 1b","size":"6.38 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Plate 1b"},{"id":85641,"rank":402,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1983/0332/plate-3.pdf","text":"Plate 2","size":"2.03 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Plate 2"},{"id":85639,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1983/0332/plate-1.pdf","text":"Plate 1a","size":"3.28 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Plate 1a"}],"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 40,\n 20.5 \n ],\n [\n 40,\n 21\n ],\n [\n 39.5,\n 21\n ],\n [\n 39.5,\n 20.5 \n ],\n [\n 40,\n 20.5\n ]\n ]\n ]\n }\n }\n ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a71e4b07f02db642753","contributors":{"authors":[{"text":"Pallister, John S. 0000-0002-2041-2147 jpallist@usgs.gov","orcid":"https://orcid.org/0000-0002-2041-2147","contributorId":2024,"corporation":false,"usgs":true,"family":"Pallister","given":"John","email":"jpallist@usgs.gov","middleInitial":"S.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":238356,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":61519,"text":"mf1577C - 1983 - Geochemical map of the Arnold Mesa Roadless Area, Yavapai County, Arizona","interactions":[],"lastModifiedDate":"2016-08-23T10:40:39","indexId":"mf1577C","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1983","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":"1577","chapter":"C","title":"Geochemical map of the Arnold Mesa Roadless Area, Yavapai County, Arizona","docAbstract":"

The Wilderness Act (Public Law 88-577, September 3, 1964) and related acts require the U.S. Geological Survey and the U.S. Bureau of Mines to survey certain areas on Federal lands to determine their mineral resource potential. Results must be made available to the public and be submitted to the President and the Congress. This report presents the results of a geochemical survey of the Arnold Mesa Roadless Area (U.S. Forest Service number 03092) in the Prescott and Tonto National Forests, Yavapai County, Arizona. The Arnold Mesa Roadless Area was classified as a further planning area during the Second Roadless Area Review and Evaluation (RARE II) by the U.S. Forest Service, January 1979.

\n

During 1980 the U.S. Geological Survey and the U.S. Bureau of Mines (USBM) conducted field investigations to evaluate the mineral resource potential of the Arnold Mesa Roadless Area, Yavapai County, Arizona. Field studies included geologic mapping (Wolrfe, 1983), aeromagnetic mapping (Davis and Wolfe, 1983), geochemical sampling (this report), and a survey of known mines and prospects (McColly and Korzeb, 1981).

\n

The Arnold Mesa Roadless Area comprises about 28,000 acres (11,300 hectares) in and along the flanks of the Black Hills south of Camp Verde, Arizona. The Black Hills form a northwest-trending drainage divide, between the Agua Fria drainage on the west and Verde River on the east, that extends through the roadless area. The crest and southwest flank of the divide within the study area are moderately dissected, gently rolling uplands. The northeast flank is steep terrain that forms the western wall of the Verde Valley. The northeast flank has a total relief within the study area of almost 4,000 ft (more than 1,200 m) and is deeply incised by the canyons of Gap and Chasm Creeks. Unpaved roads provide access to much of the perimeter of the Arnold Mesa Roadless Area, but the interior is accessible only by foot, horse, or helicopter.

\n

 

","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/mf1577C","usgsCitation":"Wolfe, E.W., 1983, Geochemical map of the Arnold Mesa Roadless Area, Yavapai County, Arizona: U.S. Geological Survey Miscellaneous Field Studies Map 1577, 58.63 x 40.35 inches, https://doi.org/10.3133/mf1577C.","productDescription":"58.63 x 40.35 inches","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":182475,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/mf1577C.PNG"},{"id":327607,"rank":1,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/mf/1577-C/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}}],"scale":"24000","country":"United States","state":"Arizona","county":"Yavapai County","otherGeospatial":"Arnold Mesa Roadless Area, Prescott National Forest, Tonto National Forest","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -112,\n 34.5\n ],\n [\n -112,\n 34.2\n ],\n [\n -111.6,\n 34.2\n ],\n [\n -111.6,\n 34.5\n ],\n [\n -112,\n 34.5\n ]\n ]\n ]\n }\n }\n ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b23e4b07f02db6ae229","contributors":{"authors":[{"text":"Wolfe, Edward W.","contributorId":79878,"corporation":false,"usgs":true,"family":"Wolfe","given":"Edward","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":265862,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":10253,"text":"ofr83156 - 1983 - Lake Ellen kimberlite, Michigan, U.S.A.","interactions":[],"lastModifiedDate":"2012-02-02T00:06:26","indexId":"ofr83156","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1983","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":"83-156","title":"Lake Ellen kimberlite, Michigan, U.S.A.","docAbstract":"The recently discovered Lake Ellen kimberlite, in northern Michigan, indicates that bedrock sources of diamonds found in glacial deposits in the Great Lakes area could lie within the northern U.S. Magnetic surveys show a main kimberlite 200 m in diameter and an adjacent body 25 x 90 m(?). The kimberlite cuts Proterozoic volcanic rocks that overlie Archean basement, but is post-Ordovician in age based on abundant Ordovician(?) dolomite inclusions. Xenocrysts and megacrysts are ilmenite (abundant, 12.5-19% MgO), pyropealmandine and Cr-pyrope (up to 9.3% Cr2O3), Cr-diopside (up to 4.5% Cr2O3), olivine (Fo 91), enstatite and phlogopite. The kimberlite contains fragments of crustal schist and granulite, as well as disaggregated crystals and rare xenoliths of eclogites, garnet pyroxenites and garnet peridotites from a heterogeneous upper mantle. Eclogites, up to 3 cm size, show granoblastic equant or tabular textures and consist of jadeitic cpx (up to 8.4% Na20, 15.3% Al2O3), pyrope-almandine, ? rutile ? kyanite ? sanidine ? sulfide. Garnet pyroxenite contains pyrope--(0.44% Cr2O3) + cpx (0.85% Na2O, 0.53% Cr2O3) + Mg-Al spinel. Mineral compositions of rare composite xenocrysts of garnet + cpx are distinctively peridotitic, pyroxenitic or eclogitic. Calculated temperatures of equilibration are 920-1060 ?C for the eclogites and 820-910?C for the garnet pyroxenite using the Ellis-Green method. Five peridotite garnet-clinopyroxene composite xenocrysts have calculated temperatures of 980-1120?C using the Lindsley-Dixon 20 kb solvus. Spinel pyroxenite and clinopyroxene-orthopyroxene composites have lower calculated temperatures of 735?C and 820-900?C, respectively. Kyanite-bearing eclogites must have formed at pressures greater than 18-20 kb. Using the present shield geotherm with a heat flow value of 44mW/m 2 for the time of kimberlite emplacement, the eclogite temperatures imply pressures of 35-48 kb (105-140 km) and the garnet pyroxenite temperatures indicate pressures of 24-29 kb (75-90 km). Temperatures of two peridotitic garnet-cpx composite xenocrysts if on a shield geotherm, imply pressures within the diamond stability field.","language":"ENGLISH","publisher":"U.S. Geological Survey,","doi":"10.3133/ofr83156","usgsCitation":"McGee, E.S., and Hearn, B., 1983, Lake Ellen kimberlite, Michigan, U.S.A.: U.S. Geological Survey Open-File Report 83-156, 24 p. ill., maps ;28 cm., https://doi.org/10.3133/ofr83156.","productDescription":"24 p. ill., maps ;28 cm.","costCenters":[],"links":[{"id":143095,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1983/0156/report-thumb.jpg"},{"id":38117,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1983/0156/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b32e4b07f02db6b4359","contributors":{"authors":[{"text":"McGee, E. S.","contributorId":75927,"corporation":false,"usgs":true,"family":"McGee","given":"E.","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":161081,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hearn, B.C.","contributorId":7700,"corporation":false,"usgs":true,"family":"Hearn","given":"B.C.","affiliations":[],"preferred":false,"id":161080,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":10920,"text":"ofr83465 - 1983 - Hornblende-rich, high grade metamorphic terranes in the southernmost Sierra Nevada, California, and implications for crustal depths and batholith roots","interactions":[],"lastModifiedDate":"2012-02-02T00:06:21","indexId":"ofr83465","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1983","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":"83-465","title":"Hornblende-rich, high grade metamorphic terranes in the southernmost Sierra Nevada, California, and implications for crustal depths and batholith roots","docAbstract":"The southernmost Sierra Nevaaa widely exposes hornblende-rich, gneissic to granoblastic, amphibolite- to granulite-grade, metamorphic rocks and associated magmatic rocks, all of mid-Cretaceous age. Locally, red garnet, in part in euhedral crystals as large as 10 cm, as well as strongly pleochroic hyperstnene, characterize these rocks. These hornblende-rich rocks dominate the north slopes of the southern tail of the Sierra Nevada, but are also present as inclusion masses of various sizes in the dominantly granitic terrane to She northeast. \r\n\r\nThe mafic, hornblende-rich rocks reflect a deeper crustal level than the dominantly granitic terrane to the northeast based on: 1) 'index' minerals (presence of hypersthene, coarse garnet, and brown hornblende; 2) textures (considerable ambivalence of whether individual samples are metamorphic or magmatic, 3) metamorphic grade (at least local granulite facies); and 4) the presence of migmatite, and the eviaence of local melting and mobilization. These rocks may be exposures of the upper part of the root zone and metamorphic substrate of the Sierra Nevada batholith. Xenoliths of gneiss, amphibolite, and granulite from sub-batholithic levels, that have been transported upward and preserved in volcanic rocks in the central Sierra Nevada, are similar to some exposed rocks of the southernmost Sierra Nevada. \r\n\r\nHypersthene-bearing granulite and tonalite, as well as distinctive granofels of mid-Cretaceous age, are exposed in the western part of the Santa Lucia Range (some 300 km to the northwest across the San Andreas fault). These rocks have much in common with some of the metamorphic and magmatic rocks in the southernmost Sierra Nevada, suggesting that the two areas record similar metamorphic conditions and crustal depth. Mid-Cretaceous hypersthene granulite is rare, which makes correlation of the Santa Lucia Range and the southernmost Sierra Nevada seem attractive. Nevertheless, possibly significant petrographic anm rock distribution differences between the two areas (particularly the relative abundances of carbonate rocks and amphibolite) dictate caution in suggesting the two terranes were once contiguous.","language":"ENGLISH","publisher":"U.S. Geological Survey,","doi":"10.3133/ofr83465","usgsCitation":"Ross, D., 1983, Hornblende-rich, high grade metamorphic terranes in the southernmost Sierra Nevada, California, and implications for crustal depths and batholith roots: U.S. Geological Survey Open-File Report 83-465, 56 p. maps ;28 cm., https://doi.org/10.3133/ofr83465.","productDescription":"56 p. maps ;28 cm.","costCenters":[],"links":[{"id":142457,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1983/0465/report-thumb.jpg"},{"id":38687,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1983/0465/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ae0e4b07f02db688147","contributors":{"authors":[{"text":"Ross, Donald Clarence","contributorId":49768,"corporation":false,"usgs":true,"family":"Ross","given":"Donald Clarence","affiliations":[],"preferred":false,"id":162209,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":13404,"text":"ofr83447 - 1983 - Reconnaissance geology of the Jabal Saq Quadrangle, sheet 26/43 C, Kingdom of Saudi Arabia","interactions":[],"lastModifiedDate":"2015-09-07T14:45:48","indexId":"ofr83447","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1983","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":"83-447","title":"Reconnaissance geology of the Jabal Saq Quadrangle, sheet 26/43 C, Kingdom of Saudi Arabia","docAbstract":"

The Jabal Saq quadrangle is located in the northeastern part of the Arabian Shield at the northern end of the Najd region between lat 26?00' and 26?30' N. and long 43?00' and 43?30' E. The northeastern two-thirds of the quadrangle is underlain by Paleozoic sedimentary rocks, the southwestern one-third by Proterozoic metamorphic and igneous rocks. The oldest rocks in the quadrangle are weakly metamorphosed immature sandstones that may correlate with the Murdama group. They have been intruded by several large plutons ranging in composition from mafic granodiorite to syenogranite. A densely developed fracture cleavage cuts the metamorphic rocks; otherwise, no structural features were recorded.

\n

The quadrangle has low mineral potential; no ancient mines were identified. The Dharaymeeah syenogranite forms a large pluton and bears some petrologic resemblance to alkali granites identified elsewhere in the Arabian Shield that have documented potential for containing deposits of lithophile rare metals. Analyses of wadi sediment samples collected in the quadrangle suggest that the syenogranite may also be enriched in some of these elements. The anomalously radioactive Usba monzogranite resembles highly evolved peraluminous granite plutons that elsewhere in the world are associated with deposits of tin and tungsten.

","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr83447","usgsCitation":"Du Bray, E., 1983, Reconnaissance geology of the Jabal Saq Quadrangle, sheet 26/43 C, Kingdom of Saudi Arabia: U.S. Geological Survey Open-File Report 83-447, i, 22 p. :ill., maps ;28 cm., https://doi.org/10.3133/ofr83447.","productDescription":"i, 22 p. :ill., maps ;28 cm.","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":41833,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1983/0447/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":41834,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1983/0447/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":145916,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1983/0447/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 43,\n 27\n ],\n [\n 43,\n 26\n ],\n [\n 44,\n 26\n ],\n [\n 44,\n 27\n ],\n [\n 43,\n 27\n ]\n ]\n ]\n }\n }\n ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a6fe4b07f02db640744","contributors":{"authors":[{"text":"Du Bray, E. A.","contributorId":22333,"corporation":false,"usgs":true,"family":"Du Bray","given":"E. A.","affiliations":[],"preferred":false,"id":167753,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":8628,"text":"ofr83369 - 1983 - Geochemical evaluation of felsic plutonic rocks in the eastern and southeastern Arabian Shield, Kingdom of Saudi Arabia","interactions":[],"lastModifiedDate":"2012-02-02T00:06:22","indexId":"ofr83369","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1983","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":"83-369","title":"Geochemical evaluation of felsic plutonic rocks in the eastern and southeastern Arabian Shield, Kingdom of Saudi Arabia","docAbstract":"In a geochemical evaluation of the eastern and southeastern Arabian Shield, which included collection of 696 rock samples and 694 pan concentrate samples, a province of tin-anomalous granitoid plutons was defined. Pan concentrates collected in and around these plutons were enriched in tin and tungsten relative to the concentrate population. Rock samples of these leucocratic, muscovite-bearing, peraluminous granites contained anomalously high concentrations of lithium, fluorine, beryllium, lead, rubidium, niobium, yttrium, tin, bismuth, silver, and tungsten. \r\n\r\nTen tin-anomalous plutons were located in the study area. The plutons are typically small, less than 10 km2 in areal extent, and circular to elliptical in plan view. The resource potential of these latest Proterozoic plutons has not been established; economically exploitable concentrations of tin, tungsten, molybdenum, or zinc may be present, and followup studies are warranted. Further, two of the plutons are characterized by higher than normal total-count radioactivity and have potential for uranium, thorium, or rare-earth element deposits.","language":"ENGLISH","publisher":"U.S. Geological Survey,","doi":"10.3133/ofr83369","usgsCitation":"Du Bray, E., Elliott, J., and Stoeser, D.B., 1983, Geochemical evaluation of felsic plutonic rocks in the eastern and southeastern Arabian Shield, Kingdom of Saudi Arabia: U.S. Geological Survey Open-File Report 83-369, 57 p. ill., maps ;28 cm., https://doi.org/10.3133/ofr83369.","productDescription":"57 p. ill., maps ;28 cm.","costCenters":[],"links":[{"id":142335,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1983/0369/report-thumb.jpg"},{"id":36228,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1983/0369/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":36229,"rank":401,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1983/0369/plate-2.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":36230,"rank":402,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1983/0369/plate-3.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":36231,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1983/0369/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b23e4b07f02db6ae2e5","contributors":{"authors":[{"text":"Du Bray, E. A.","contributorId":22333,"corporation":false,"usgs":true,"family":"Du Bray","given":"E. A.","affiliations":[],"preferred":false,"id":158054,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Elliott, James E.","contributorId":15595,"corporation":false,"usgs":true,"family":"Elliott","given":"James E.","affiliations":[],"preferred":false,"id":158052,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Stoeser, D. B.","contributorId":18735,"corporation":false,"usgs":true,"family":"Stoeser","given":"D.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":158053,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70048213,"text":"tei35 - 1983 - Proposed program for and present status of the Geological Survey's investigation of domestic resources of radioactive raw materials","interactions":[],"lastModifiedDate":"2014-09-24T13:58:56","indexId":"tei35","displayToPublicDate":"1990-01-24T10:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":337,"text":"Trace Elements Investigations","code":"TEI","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"35","title":"Proposed program for and present status of the Geological Survey's investigation of domestic resources of radioactive raw materials","docAbstract":"This interim report is designed to show the present status of the Geological Survey's information and the parts of a comprehensive program necessary to improve our information about the raw material resources of uranium and thorium. Rarely in geologic work has it been necessary. to determine so completely a nation's resources of useful minerals in so brief a span of time. Ordinarily, information on mineral resources Is accumulated during a long period of years. However, uranium and thorium were suddenly thrust from a position of subsidiary economic interest into one of great strategic importance. Information concerning their occurrence must, therefore, be obtained as rapidly as reliable methods of investigation will permit. Accordingly the program must be at once comprehensive and carried out over an area more extensive than is usual in the search for and appraisal of most other mineral resources.","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/tei35","usgsCitation":"Bulter, A., Killeen, P., Page, G., and Rubey, W., 1983, Proposed program for and present status of the Geological Survey's investigation of domestic resources of radioactive raw materials: U.S. Geological Survey Trace Elements Investigations 35, Report: iii, 16 p.; Plate 4: 23.46 inches x 15.73 inches, https://doi.org/10.3133/tei35.","productDescription":"Report: iii, 16 p.; Plate 4: 23.46 inches x 15.73 inches","additionalOnlineFiles":"Y","costCenters":[],"links":[{"id":277612,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/tei/035/report-thumb.jpg"},{"id":279872,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/tei/035/plate-4.pdf"},{"id":279871,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/tei/035/report.pdf"}],"country":"United States","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -124.8,24.5 ], [ -124.8,49.383333 ], [ -66.95,49.383333 ], [ -66.95,24.5 ], [ -124.8,24.5 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"529dba3fe4b0516126f68dfa","contributors":{"authors":[{"text":"Bulter, A.P. Jr.","contributorId":26614,"corporation":false,"usgs":true,"family":"Bulter","given":"A.P.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":484019,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Killeen, P.L.","contributorId":69959,"corporation":false,"usgs":true,"family":"Killeen","given":"P.L.","email":"","affiliations":[],"preferred":false,"id":484020,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Page, G.B.","contributorId":26216,"corporation":false,"usgs":true,"family":"Page","given":"G.B.","email":"","affiliations":[],"preferred":false,"id":484018,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Rubey, W.W.","contributorId":6426,"corporation":false,"usgs":true,"family":"Rubey","given":"W.W.","affiliations":[],"preferred":false,"id":484017,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70011256,"text":"70011256 - 1983 - Multiple microtektite horizons in upper Eocene marine sediments: No evidence for mass extinctions","interactions":[],"lastModifiedDate":"2025-12-09T16:37:28.85255","indexId":"70011256","displayToPublicDate":"1983-07-08T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3338,"text":"Science","active":true,"publicationSubtype":{"id":10}},"title":"Multiple microtektite horizons in upper Eocene marine sediments: No evidence for mass extinctions","docAbstract":"

Microtektites have been recovered from three horizons in eight middle Eocene to middle Oligocene marine sediment sequences. Five of these occurrences are coeval and of latest Eocene age (37.5 to 38.0 million years ago); three are coeval and of early late Eocene age (38.5 to 39.5 million years ago); and three are of middle Oligocene age (31 to 32 million years ago). In addition, rare probable microtektites have been found in sediments with ages of about 36.0 to 36.5 million years. The microtektite horizon at 37.5 to 38.0 million years can be correlated with the North American tektite-strewn field, which has a fission track age (minimum) of 34 to 35 million years and a paleomagnetic age of 37.5 to 38.0 million years. There is no evidence for mass faunal extinctions at any of the microtektite horizons. Many of the distinct faunal changes that occurred in the middle Eocene to middle Oligocene can be related to the formation of the Antarctic ice sheet and the associated cooling phenomena and intensification of bottom currents that led to large-scale dissolution of calcium carbonate and erosion, which created areally extensive hiatuses in the deep-sea sediment records. The occurrence of microtektite horizons of several ages and the lack of evidence for faunal extinctions suggest that the effects of extraterrestrial bolide impacts may be unimportant in the biologic realm during middle Eocene to middle Oligocene time.

","language":"English","publisher":"American Association for the Advancement of Science","doi":"10.1126/science.221.4606.150","issn":"00368075","usgsCitation":"Keller, G., D’Hondt, S.L., and Vallier, T., 1983, Multiple microtektite horizons in upper Eocene marine sediments: No evidence for mass extinctions: Science, v. 221, no. 4606, p. 150-152, https://doi.org/10.1126/science.221.4606.150.","productDescription":"3 p.","startPage":"150","endPage":"152","costCenters":[],"links":[{"id":221745,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"221","issue":"4606","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a606fe4b0c8380cd71460","contributors":{"authors":[{"text":"Keller, G.","contributorId":72527,"corporation":false,"usgs":true,"family":"Keller","given":"G.","affiliations":[],"preferred":false,"id":360674,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"D’Hondt, Steven L.","contributorId":82057,"corporation":false,"usgs":false,"family":"D’Hondt","given":"Steven","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":360675,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Vallier, T.L.","contributorId":69526,"corporation":false,"usgs":true,"family":"Vallier","given":"T.L.","affiliations":[],"preferred":false,"id":360673,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70011580,"text":"70011580 - 1983 - Nd and Sr isotopic studies on cenozoic mafic lavas from West Antarctica: Another source for continental alkali basalts","interactions":[],"lastModifiedDate":"2012-03-12T17:18:30","indexId":"70011580","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1336,"text":"Contributions to Mineralogy and Petrology","active":true,"publicationSubtype":{"id":10}},"title":"Nd and Sr isotopic studies on cenozoic mafic lavas from West Antarctica: Another source for continental alkali basalts","docAbstract":"The Nd and Sr isotopic ratios on a suite of continental alkali basalts from Marie Byrd Land, West Antarctica, define a change in the source over the range of K/Ar dates between 1 and 28 m.y. ago. The 87Sr/86Sr isotopic ratios (0.7026 to 0.7031) are unusually low for continental alkali basalts, although the corresponding 143Nd/144Nd ratios (0.51283 to 0.51299) are similar to previously reported values. On a 87Sr/86Sr vs. 143Nd/144Nd diagram, they define a trend on the low 87Sr/86Sr side of the \"mantle array\", which has a slope steeper than the mantle array. An explanation for the light rare earth elements (LREE) enrichment of the alkali basalts, with high 143Nd/144Nd ratios and low 87Sr/86Sr ratios, is suggested by a model which modifies the source region with a mantle-derived, CO2-enriched metasomatic fluid. ?? 1983 Springer-Verlag.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Contributions to Mineralogy and Petrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Springer-Verlag","doi":"10.1007/BF00373077","issn":"00107999","usgsCitation":"Futa, K., and Le Masurier, W., 1983, Nd and Sr isotopic studies on cenozoic mafic lavas from West Antarctica: Another source for continental alkali basalts: Contributions to Mineralogy and Petrology, v. 83, no. 1-2, p. 38-44, https://doi.org/10.1007/BF00373077.","startPage":"38","endPage":"44","numberOfPages":"7","costCenters":[],"links":[{"id":221451,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":205123,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF00373077"}],"volume":"83","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a63c2e4b0c8380cd72688","contributors":{"authors":[{"text":"Futa, K.","contributorId":26435,"corporation":false,"usgs":true,"family":"Futa","given":"K.","affiliations":[],"preferred":false,"id":361454,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Le Masurier, W.E.","contributorId":45053,"corporation":false,"usgs":true,"family":"Le Masurier","given":"W.E.","email":"","affiliations":[],"preferred":false,"id":361455,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70011387,"text":"70011387 - 1983 - Harmotome in a basaltic, volcaniclastic sandstone from a lacustrine deposit near Kirkland Junction, Yavapai County, Arizona","interactions":[],"lastModifiedDate":"2018-01-26T17:55:03","indexId":"70011387","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1245,"text":"Clays and Clay Minerals","onlineIssn":"1552-8367","printIssn":"0009-8604","active":true,"publicationSubtype":{"id":10}},"title":"Harmotome in a basaltic, volcaniclastic sandstone from a lacustrine deposit near Kirkland Junction, Yavapai County, Arizona","docAbstract":"

Harmotome, probably the most common of the barium-rich zeolites, has been reported from a variety of metamorphic and igneous rocks throughout the world (Deer et al., 1963). Harmotome, however, seems to be a rare authigenic constituent in sedimentary rocks, and its most common occurrence apparently is in deep-sea sediments where its abundance is minor compared with that of phillipsite and clinoptilolite (Kastner and Stonecipher, 1978). The only previous reports of harmotome from lacustrine rocks are in oil shale of the Eocene Green River Formation in the Piceance Creek basin of Colorado and in silicic tufts of the Pliocene Big Sandy Formation near Wikieup, Arizona (Sheppard and Gude, 1971).

","language":"English","publisher":"The Clay Minerals Society","doi":"10.1346/CCMN.1983.0310109","usgsCitation":"Sheppard, R.A., and Gude, A.J., 1983, Harmotome in a basaltic, volcaniclastic sandstone from a lacustrine deposit near Kirkland Junction, Yavapai County, Arizona: Clays and Clay Minerals, v. 31, no. 1, p. 57-59, https://doi.org/10.1346/CCMN.1983.0310109.","productDescription":"3 p.","startPage":"57","endPage":"59","costCenters":[],"links":[{"id":221583,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"31","issue":"1","noUsgsAuthors":false,"publicationDate":"2024-04-02","publicationStatus":"PW","scienceBaseUri":"505a2f7ae4b0c8380cd5ce02","contributors":{"authors":[{"text":"Sheppard, Richard A.","contributorId":41815,"corporation":false,"usgs":true,"family":"Sheppard","given":"Richard","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":360981,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gude, Arthur J. III","contributorId":15215,"corporation":false,"usgs":true,"family":"Gude","given":"Arthur","suffix":"III","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":360982,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70011383,"text":"70011383 - 1983 - The compositionally zoned eruption of 1912 in the Valley of Ten Thousand Smokes, Katmai National Park, Alaska","interactions":[],"lastModifiedDate":"2020-10-03T15:51:38.932929","indexId":"70011383","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2499,"text":"Journal of Volcanology and Geothermal Research","active":true,"publicationSubtype":{"id":10}},"title":"The compositionally zoned eruption of 1912 in the Valley of Ten Thousand Smokes, Katmai National Park, Alaska","docAbstract":"

On June 6–8, 1912, ∼ 15 km3 of magma erupted from the Novarupta caldera at the head of the Valley of Ten Thousand Smokes (VTTS), producing ∼ 20 km3 of air-fall tephra and 11–15 km3 of ash-flow tuff within ∼ 60 hours. Three discrete periods of ash-fall at Kodiak correlate, respectively, with Plinian tephra layers designated A, CD, and FG by Curtis (1968) in the VTTS. The ash-flow sequence overlapped with but outlasted pumice fall A, terminating within 20 hours of the initial outbreak and prior to pumice fall C. Layers E and H consist mostly of vitric dust that settled during lulls, and Layer B is the feather edge of the ash flow. The fall units filled and obscured the caldera, but arcuate and radial fissures outline a 6-km2 depression. The Novarupta lava dome and its ejecta ring were emplaced later within the depression. At Mt. Katmai, 10 km east of the 1912 vent, a 600-m-deep caldera of similar area also collapsed at about this time, probably owing to hydraulic connection with the venting magma system; but all known ejecta are thought to have erupted at Novarupta. Mingling of three distinctive magmas during the eruption produced an abundance of banded pumice, and mechanical mixing of chilled ejecta resulted in deposits with a wide range of bulk composition. Pumice in the initial fall unit (A) is 100% rhyolite, but fall units atop the ash flow are > 98% dacite; black andesitic scoria is common only in the ash flows and in near-vent air-fall tephra. Pumice counts show the first half of the ash-flow deposit to be 91–98% rhyolite, but progressive increases of dacite and andesite eventually reduced the rhyolitic component to < 2%. The later, rhyolite-poor flows were hotter, less mobile, and widely produced partially welded tuff and vapor-indurated sillar.

The main ash flow was too deflated and sluggish 16 km from the vent to surmount a 25-m-high moraine in its path but was diverted around it and continued 5 km down-valley, engulfing and charring trees but not toppling all of them. Thin ash-flow veneers feather 30–40 m up the enclosing valley walls but only where a constriction in the central VTTS locally raised the flow level. In the upper VTTS, the “high sand mark” is not a veneer but a marginal bench formed in thick tuff by differential compaction. Flooding from adjacent glaciers led to phreatic explosions that ejected blocks of tuff more welded than any yet exposed. A cluster of phreatic craters dammed a lake atop the tuff, the breaching of which caused a flood that scoured the ash-flow surface in the central VTTS, transported 50-cm blocks of welded tuff > 20 km to the lowermost VTTS, and deposited 1–8 m of debris there.

Rhyolitic ejecta contain only 1–2% phenocrysts but andesite and dacite have 30–45%. Quartz is present and augite absent only in the rhyolite, but all ejecta contain plagioclase, orthopyroxene, titanomagnetite, ilmenite, apatite, and pyrrhotite; rare olivine occurs in the andesite. The zoning ranges of phenocrysts in the rhyolitic and intermediate ejecta do not overlap. New chemical data show the bulk SiO2 range to be: rhyolite 77 ± 0.6, dacite 66-64.5, and andesite 61.5–58.5%. The dacitic and andesitic ejecta contrast in color and density, and it is not certain whether they form a compositional continuum. Analyses reported by Fenner within the 66–76% SiO2 range were of banded pumice and lava and of bulk tephra that mechanically fractionated and mixed during flight. Despite the gap of 10% SiO2, Fe-Ti-oxide temperatures show a continuous range from rhyolite (805–850°C) through dacite (855–955°C) to andesite (955–990°C). Thermal continuity and isotopic and trace-element data suggest that all were derived from a single magmatic system, whether or not they were physically contiguous before eruption. If the rhyolitic liquid separated from dacitic magma, extraction was so efficient that no dacitic phenocrysts were retained and no bulk compositions in the range 66–76% SiO2 were created; if it were a partial melt of roof rocks atop an intermediate magma body, then such rocks had no O- or Sr-isotopic contrast with the andesite-dacite magma and clearly did not include the Jurassic arkosic or granitic basement. The presence of Holocene domes of pre-1912 glassy dacite adjacent to the 1912 vent suggest that the 7 km3 (or more) of high-silica rhyolitic magma (a composition rare in the Aleutian arc) was generated in less than a few thousand years. The 1912 vent is semi-encircled by several andesitic stratocones and is as close to Mageik, Trident, and Griggs volcanoes as it is to Mt. Katmai. The erupted magma probably occupied only shallow levels of an extensive system of injection and storage under a cluster of several stratovolcanoes. Although Quaternary basalt is not known to have erupted here, the intrusion of basaltic magma probably sustains the greater-VTTS magmatic system.

","language":"English","publisher":"Elsevier","doi":"10.1016/0377-0273(83)90003-3","issn":"03770273","usgsCitation":"Hildreth, W., 1983, The compositionally zoned eruption of 1912 in the Valley of Ten Thousand Smokes, Katmai National Park, Alaska: Journal of Volcanology and Geothermal Research, v. 18, no. 1-4, p. 1-56, https://doi.org/10.1016/0377-0273(83)90003-3.","productDescription":"56 p.","startPage":"1","endPage":"56","numberOfPages":"56","costCenters":[],"links":[{"id":221521,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Katmai National Park","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -156.368408203125,\n 57.66303463288711\n ],\n [\n -153.25927734375,\n 57.66303463288711\n ],\n [\n -153.25927734375,\n 59.33318942659219\n ],\n [\n -156.368408203125,\n 59.33318942659219\n ],\n [\n -156.368408203125,\n 57.66303463288711\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"18","issue":"1-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505baa4ee4b08c986b3227c4","contributors":{"authors":[{"text":"Hildreth, W. 0000-0002-7925-4251","orcid":"https://orcid.org/0000-0002-7925-4251","contributorId":100487,"corporation":false,"usgs":true,"family":"Hildreth","given":"W.","affiliations":[],"preferred":false,"id":360971,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70011279,"text":"70011279 - 1983 - Importance of the Lu-Hf isotopic system in studies of planetary chronology and chemical evolution","interactions":[],"lastModifiedDate":"2024-03-18T14:57:39.616946","indexId":"70011279","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1759,"text":"Geochimica et Cosmochimica Acta","active":true,"publicationSubtype":{"id":10}},"title":"Importance of the Lu-Hf isotopic system in studies of planetary chronology and chemical evolution","docAbstract":"

The 176Lu-176Hf isotope method and its applications in earth sciences are discussed. Greater fractionation of Lu/Hf than Sm/Nd in planetary magmatic processes makes 176Hf177Hf\">176Hf177Hf a powerful geochemical tracer. In general, proportional variations of 176Hf177Hf\">176Hf177Hf exceed those of 143Ndl44Nd\">143Nd144Nd by factors of 1.5–3 in terrestrial and lunar materials. Lu-Hf studies therefore have a major contribution to make in understanding of terrestrial and other planetary evolution through time, and this is the principal importance of Lu-Hf. New data on basalts from oceanic islands show unequivocally that whereas considerable divergences occur in 176Hf177Hf-87Sr86Sr\">176Hf177Hf-87Sr86Sr and 143Ndl44Nd-87Sr86Sr\">143Nd144Nd-87Sr86Sr diagrams, 176Hf177Hf\">176Hf177Hf and 143Nd144Nd\">143Nd144Nd display a single, linear isotopic variation in the suboceanic mantle. These discordant 87Sr86Sr\">87Sr86Sr relationships may allow, with the acquisition of further Hf-Nd-Sr isotopic data, a distinction between processes such as mantle metasomatism, influence of seawater-altered material in the magma source, or recycling of sediments into the mantle. In order to evaluate the Hf-Nd isotopic correlation in terms of mantle fractionation history, there is a need for measurements of Hf distribution coefficients between silicate minerals and liquids, and specifically for a knowledge of Hf behavior in relation to rareearth elements. For studying ancient terrestrial Hf isotopic variations, the best quality Hf isotope data are obtained from granitoid rocks or zircons. New data show that very U-Pb discordant zircons may have upwardly-biased 176Hf177Hf\">176Hf177Hf, but that at least concordant to slightly discordant zircons appear to be reliable carriers of initial 176Hf177Hf\">176Hf177Hf. Until the controls on addition of radiogenic Hf to zircon are understood, combined zircon-whole rock studies are recommended. Lu-Hf has been demonstrated as a viable tool for dating of ancient terrestrial and extraterrestrial samples, but because it offers little advantage over existing methods, is unlikely to find wide application in pure chronological studies.




","language":"English","publisher":"Elsevier","doi":"10.1016/0016-7037(83)90092-3","issn":"00167037","usgsCitation":"Patchett, P., 1983, Importance of the Lu-Hf isotopic system in studies of planetary chronology and chemical evolution: Geochimica et Cosmochimica Acta, v. 47, no. 1, p. 81-91, https://doi.org/10.1016/0016-7037(83)90092-3.","productDescription":"11 p.","startPage":"81","endPage":"91","numberOfPages":"11","costCenters":[],"links":[{"id":221036,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"47","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3945e4b0c8380cd6187d","contributors":{"authors":[{"text":"Patchett, P. J.","contributorId":55152,"corporation":false,"usgs":true,"family":"Patchett","given":"P. J.","affiliations":[],"preferred":false,"id":360733,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":1000173,"text":"1000173 - 1983 - Seasonal food of juvenile lake trout in U.S. waters of Lake Ontario","interactions":[],"lastModifiedDate":"2016-03-31T15:06:50","indexId":"1000173","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2330,"text":"Journal of Great Lakes Research","active":true,"publicationSubtype":{"id":10}},"title":"Seasonal food of juvenile lake trout in U.S. waters of Lake Ontario","docAbstract":"

Stomach contents of 3,554 lake trout (Salvelinus namaycush), 100 to 449 mm in total length, captured with bottom trawls during April through October 1978–81 along the south shore of Lake Ontario were examined. Invertebrates appeared to be an important food of lake trout less than 200 mm long but were only occasionally eaten by larger fish. For all seasons and size groups of juvenile lake trout combined, the slimy sculpin (Cottus cognatus) was the principal forage fish, making up 42% (by weight) of identifiable fish remains. Young-of-the-year slimy sculpins were a major food of recently stocked yearling lake trout during July through October. Alewives (Alosa pseudoharengus) were the principal forage during April and May, and made up 28% (by weight) of the identifiable fish remains. They were rarely eaten during July and August, however, when lake trout remained in the hypolimnion and alewives were above it. Over 99% of the alewives eaten from April through August were yearlings and over 99% eaten during October were young-of-the-year. Rainbow smelt (Osmerus mordax) were the primary forage during July and August, but contributed only a small part of the diet during other seasons; overall, they made up 25% of identifiable fish remains. Johnny darters (Etheostoma nigrum) made up 4% of identifiable fish remains and were most common in stomachs of small lake trout during October.

","language":"English","publisher":"Elsevier","doi":"10.1016/S0380-1330(83)71911-8","usgsCitation":"Elrod, J.H., 1983, Seasonal food of juvenile lake trout in U.S. waters of Lake Ontario: Journal of Great Lakes Research, v. 9, no. 3, p. 396-402, https://doi.org/10.1016/S0380-1330(83)71911-8.","productDescription":"7 p.","startPage":"396","endPage":"402","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":324,"text":"Great Lakes Science Center","active":true,"usgs":true}],"links":[{"id":133221,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"9","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a0ce4b07f02db5fc397","contributors":{"authors":[{"text":"Elrod, Joseph H.","contributorId":72737,"corporation":false,"usgs":true,"family":"Elrod","given":"Joseph","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":308186,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70011413,"text":"70011413 - 1983 - Rb-Sr, Sm-Nd, K-Ca, O, and H isotopic study of Cretaceous-Tertiary boundary sediments, Caravaca, Spain: evidence for an oceanic impact site","interactions":[],"lastModifiedDate":"2019-08-01T07:49:28","indexId":"70011413","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1427,"text":"Earth and Planetary Science Letters","active":true,"publicationSubtype":{"id":10}},"title":"Rb-Sr, Sm-Nd, K-Ca, O, and H isotopic study of Cretaceous-Tertiary boundary sediments, Caravaca, Spain: evidence for an oceanic impact site","docAbstract":"

Isotopic ratios and trace element abundances were measured on samples of Ir-enriched clay at the Cretaceous-Tertiary boundary, and in carbonate and marl from 5 cm below and 3 cm above the boundary. Samples were leached with acetic acid to remove carbonate, and with hydrochloric acid. Leachates and residues were measured. The Sr, Nd, O and H isotopic compositions of the boundary clay residues are distinct from those of the stratigraphically neighboring materials. The data indicate that most of the clay material was derived from a terrestrial source with relatively low87Sr/86Sr and high143Nd/144Nd ratios. The δ18O data suggest that the detritus has been modified by submarine weathering. K-Ca and Rb-Sr systematics, as well as O isotope ratios of K-feldspar spherules within the boundary clay, suggest that they are predominantly authigenic and may have formed after the time of deposition. However, Sm-Nd and Rb-Sr isotopic data indicate that the spherules contain relict material that provides information on the nature of the original detritus. The isotopic evidence for foreign terrestrial detritus in the boundary clay, the low rare earth element concentrations and high Ni concentration, support the hypothesis of a terminal Cretaceous asteroidal impact that produced a global layer of fallout. The data are most easily explained if the impact site was on oceanic crust rather than continental crust, and if a substantial fraction of the fallout was derived from relatively deep within the lithosphere (>3 km). This would probably require a single large impactor.

","language":"English","publisher":"Elsevier","doi":"10.1016/0012-821X(83)90096-1","issn":"0012821X","usgsCitation":"DePaolo, D., Kyte, F., Marshall, B., O’Neil, J.R., and Smit, J., 1983, Rb-Sr, Sm-Nd, K-Ca, O, and H isotopic study of Cretaceous-Tertiary boundary sediments, Caravaca, Spain: evidence for an oceanic impact site: Earth and Planetary Science Letters, v. 64, no. 3, p. 356-373, https://doi.org/10.1016/0012-821X(83)90096-1.","productDescription":"18 p.","startPage":"356","endPage":"373","costCenters":[{"id":35995,"text":"Geology, Geophysics, and Geochemistry Science Center","active":true,"usgs":true}],"links":[{"id":220836,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Spain","city":"Caravaca","otherGeospatial":"Barranco del Gredero","geographicExtents":"{\"type\":\"FeatureCollection\",\"features\":[{\"type\":\"Feature\",\"geometry\":{\"type\":\"Polygon\",\"coordinates\":[[[-9.03482,41.88057],[-8.98443,42.59278],[-9.39288,43.02662],[-7.97819,43.74834],[-6.75449,43.56791],[-5.41189,43.57424],[-4.34784,43.40345],[-3.51753,43.4559],[-1.90135,43.4228],[-1.50277,43.03401],[0.33805,42.57955],[0.70159,42.79573],[1.82679,42.34338],[2.986,42.47302],[3.03948,41.89212],[2.09184,41.22609],[0.81052,41.01473],[0.72133,40.67832],[0.10669,40.12393],[-0.27871,39.30998],[0.11129,38.73851],[-0.46712,38.29237],[-0.68339,37.64235],[-1.43838,37.44306],[-2.14645,36.67414],[-3.41578,36.6589],[-4.3689,36.67784],[-4.99522,36.32471],[-5.37716,35.94685],[-5.86643,36.02982],[-6.23669,36.36768],[-6.52019,36.94291],[-7.45373,37.09779],[-7.53711,37.4289],[-7.16651,37.80389],[-7.02928,38.07576],[-7.37409,38.37306],[-7.09804,39.03007],[-7.49863,39.62957],[-7.06659,39.71189],[-7.02641,40.18452],[-6.86402,40.33087],[-6.85113,41.11108],[-6.38909,41.38182],[-6.66861,41.88339],[-7.25131,41.91835],[-7.42251,41.79207],[-8.01317,41.79089],[-8.26386,42.28047],[-8.67195,42.13469],[-9.03482,41.88057]]]},\"properties\":{\"name\":\"Spain\"}}]}","volume":"64","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a9564e4b0c8380cd819ae","contributors":{"authors":[{"text":"DePaolo, D.J.","contributorId":8617,"corporation":false,"usgs":true,"family":"DePaolo","given":"D.J.","email":"","affiliations":[],"preferred":false,"id":361025,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kyte, F.T.","contributorId":25700,"corporation":false,"usgs":true,"family":"Kyte","given":"F.T.","email":"","affiliations":[],"preferred":false,"id":361027,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Marshall, B.D.","contributorId":19581,"corporation":false,"usgs":true,"family":"Marshall","given":"B.D.","email":"","affiliations":[],"preferred":false,"id":361026,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"O’Neil, J. R.","contributorId":69633,"corporation":false,"usgs":true,"family":"O’Neil","given":"J.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":361029,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Smit, J.","contributorId":32677,"corporation":false,"usgs":true,"family":"Smit","given":"J.","email":"","affiliations":[],"preferred":false,"id":361028,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":1001454,"text":"1001454 - 1983 - Avian associations of the northern Great Plains grasslands","interactions":[],"lastModifiedDate":"2024-04-16T22:30:34.748652","indexId":"1001454","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2193,"text":"Journal of Biogeography","active":true,"publicationSubtype":{"id":10}},"title":"Avian associations of the northern Great Plains grasslands","docAbstract":"The grassland region of the northern Great Plains was divided into six broad subregions by application of an avian indicator species analysis to data obtained from 582 sample plots censused during the breeding season. Common, ubiquitous species and rare species had little classificatory value and were eliminated from the data set used to derive the avian associations. Initial statistical division of the plots likely reflected structure of the dominant plant species used for nesting; later divisions probably were related to foraging or nesting cover requirements based on vegetation height or density, habitat heterogeneity, or possibly to the existence of mutually similar distributions or shared areas of greater than average abundance for certain groups of species. Knowledge of the effects of grazing, mostly by cattle, on habitat use by the breeding bird species was used to interpret the results of the indicator species analysis. Moderate grazing resulted in greater species richness in nearly all subregions; effects of grazing on total bird density were more variable.","language":"English","publisher":"Wiley","doi":"10.2307/2844742","usgsCitation":"Kantrud, H., and Kologiski, R., 1983, Avian associations of the northern Great Plains grasslands: Journal of Biogeography, v. 10, p. 331-350, https://doi.org/10.2307/2844742.","productDescription":"20 p.","startPage":"331","endPage":"350","costCenters":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":133636,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"10","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a91e4b07f02db656b12","contributors":{"authors":[{"text":"Kantrud, H.A.","contributorId":28553,"corporation":false,"usgs":true,"family":"Kantrud","given":"H.A.","email":"","affiliations":[],"preferred":false,"id":311059,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kologiski, R.L.","contributorId":28213,"corporation":false,"usgs":true,"family":"Kologiski","given":"R.L.","affiliations":[],"preferred":false,"id":311058,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70011186,"text":"70011186 - 1983 - Rare-earth element geochemistry and the origin of andesites and basalts of the Taupo Volcanic Zone, New Zealand","interactions":[],"lastModifiedDate":"2013-01-21T08:47:03","indexId":"70011186","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1213,"text":"Chemical Geology","active":true,"publicationSubtype":{"id":10}},"title":"Rare-earth element geochemistry and the origin of andesites and basalts of the Taupo Volcanic Zone, New Zealand","docAbstract":"Two types of basalt (a high-Al basalt associated with the rhyolitic centres north of Taupo and a \"low-Al\" basalt erupted from Red Crater, Tongariro Volcanic Centre) and five types of andesite (labradorite andesite, labradorite-pyroxene andesite, hornblende andesite, pyroxene low-Si andesite and olivine andesite/low-Si andesite) occur in the Taupo Volcanic Zone (TVZ), North Island, New Zealand. Rare-earth abundances for both basalts and andesites are particularly enriched in light rare-earth elements. High-Al basalts are more enriched than the \"low-Al\" basalt and have values comparable to the andesites. Labradorite and labradorite-pyroxene andesites all have negative Eu anomalies and hornblende andesites all have negative Ce anomalies. The former is probably due to changing plagioclase composition during fractionation and the latter to late-stage hydration of the magma. Least-squares mixing models indicate that neither high-Al nor \"low-Al\" basalts are likely sources for labradorite/labradorite-pyroxene andesites. High-Al basalts are considered to result from fractionation of olivine and clinopyroxene from a garnet-free peridotite at the top of the mantle wedge. Labradorite/labradorite-pyroxene andesites are mainly associated with an older NW-trending arc. The source is likely to be garnet-free but it is not certain whether the andesites result from partial melting of the top of the subducting plate or a hydrated lower portion of the mantle wedge. Pyroxene low-Si andesites probably result from cumulation of pyroxene and calcic plagioclase within labradorite-pyroxene andesites, and hornblende andesites by late-stage hydration of labradorite-pyroxene andesite magma. Olivine andesites, low-Si andesites and \"low-Al\" basalts are related to the NNE-trending Taupo-Hikurangi arc structure. Although the initial source material is different for these lavas they have probably undergone a similar history to the labradorite/labradorite-pyroxene andesites. All lavas show evidence of crustal contamination. ?? 1983.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Chemical Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/0009-2541(83)90058-X","issn":"00092541","usgsCitation":"Cole, J.W., Cashman, K.V., and Rankin, P., 1983, Rare-earth element geochemistry and the origin of andesites and basalts of the Taupo Volcanic Zone, New Zealand: Chemical Geology, v. 38, no. 3-4, p. 255-274, https://doi.org/10.1016/0009-2541(83)90058-X.","startPage":"255","endPage":"274","numberOfPages":"20","costCenters":[],"links":[{"id":266112,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/0009-2541(83)90058-X"},{"id":221428,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"38","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a9529e4b0c8380cd81838","contributors":{"authors":[{"text":"Cole, J. W.","contributorId":81315,"corporation":false,"usgs":true,"family":"Cole","given":"J.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":360486,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cashman, K. V.","contributorId":16831,"corporation":false,"usgs":true,"family":"Cashman","given":"K.","email":"","middleInitial":"V.","affiliations":[],"preferred":false,"id":360485,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Rankin, P.C.","contributorId":6723,"corporation":false,"usgs":true,"family":"Rankin","given":"P.C.","email":"","affiliations":[],"preferred":false,"id":360484,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":1000548,"text":"1000548 - 1983 - Distribution and abundance of larval fish in the nearshore waters of western Lake Huron","interactions":[],"lastModifiedDate":"2016-03-31T15:22:32","indexId":"1000548","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2330,"text":"Journal of Great Lakes Research","active":true,"publicationSubtype":{"id":10}},"title":"Distribution and abundance of larval fish in the nearshore waters of western Lake Huron","docAbstract":"

Ichthyoplankton was collected at 17 nearshore (bottom depth ≥5 m but ≤10 m) sites in western Lake Huron during 1973–75 with a 0.5-m net of 351-micron mesh towed at 99 m/min. Larvae of rainbow smelt (Osmerus mordax) dominated late spring and early summer catches and larvae of alewives (Alosa pseudoharengus) the midsummer catches. Larval yellow perch (Perca flavescens) were caught in early summer but were rarely the dominant species. The time of spawning and hatching, and thus occurrence of larvae, differed between areas but was less variable for alewives than for yellow perch. The appearance of larvae in Saginaw Bay was followed successively by their appearance in southern, central, and northern Lake Huron. Rainbow smelt were most abundant in northern Lake Huron and yellow perch and alewives in inner Saginaw Bay. Densities of either rainbow smelt or alewives occasionally exceeded 1/m3, whereas those of yellow perch never exceeded 0.1/m3. Abundance of alewives was usually highest 1 to 3 m beneath the surface and that of rainbow smelt 2 to at least 6 m beneath the surface. Important nursery areas of rainbow smelt were in bays and off irregular coastlines and those of yellow perch were in bays. All nearshore waters seemed equally important as nursery areas of alewives.

","language":"English","publisher":"Elsevier","doi":"10.1016/S0380-1330(83)71867-8","usgsCitation":"O’Gorman, R., 1983, Distribution and abundance of larval fish in the nearshore waters of western Lake Huron: Journal of Great Lakes Research, v. 9, no. 1, p. 14-22, https://doi.org/10.1016/S0380-1330(83)71867-8.","productDescription":"9 p.","startPage":"14","endPage":"22","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":324,"text":"Great Lakes Science Center","active":true,"usgs":true}],"links":[{"id":133405,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"9","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a81e4b07f02db64a171","contributors":{"authors":[{"text":"O’Gorman, Robert rogorman@usgs.gov","contributorId":3451,"corporation":false,"usgs":true,"family":"O’Gorman","given":"Robert","email":"rogorman@usgs.gov","affiliations":[],"preferred":true,"id":308744,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70011392,"text":"70011392 - 1983 - Strangways Crater, Northern Territory, Australia: Siderophile element enrichment and lithophile element fractionation","interactions":[],"lastModifiedDate":"2024-06-28T16:55:13.315041","indexId":"70011392","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":6453,"text":"Journal of Geophysical Research Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Strangways Crater, Northern Territory, Australia: Siderophile element enrichment and lithophile element fractionation","docAbstract":"

The Strangways Crater, Northern Territory, Australia (15°12′S, 133°35′E), has a central core, about 10 km in diameter, of shocked granitic gneiss and amphibolite, and some remnants of a melt rock sheet, surrounded by outer rings of quartzite and siltstone to a diameter of 20–25 km. Seven samples of melt rock (six granitic melts, one shale melt clast) and four samples of country rock (granitic gneiss, amphibolite, shale, quartzite) were analyzed by neutron-activation analysis: for Sc, Cr, Fe, Co, Zn, Rb, Zr, Sb, Cs, Ba, rare earth elements, Hf, Ta, Th, and U, the samples were analyzed instrumentally; and for Ni, Se, Pd, Ag, Cd, Re, Os, Ir, and Au, they were analyzed radiochemically. Siderophile elements are significantly enriched in the granitic melt rocks relative to country rocks; for example, the Ir enrichments range from 0.6 to 2.8 ppb. The low Ir/Ni ratio (∼0.16 relative to C1 chondrites) excludes a chondritic impacting body, and Cr enrichment argues against impact by an iron meteorite. The Strangways Crater may have been formed by the impact of an olivine-rich achondrite and melt rocks appear to contain about 3 wt.% of projectile material. The composition of the granitic melt rocks cannot be reproduced by any simple mixture of analyzed country rock types and chemical fractionation by selective shock melting appears to have taken place.

","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB088iS02p0A819","issn":"01480227","usgsCitation":"Morgan, J.W., and Wandless, G., 1983, Strangways Crater, Northern Territory, Australia: Siderophile element enrichment and lithophile element fractionation: Journal of Geophysical Research Solid Earth, v. 88, no. S02, p. A819-A829, https://doi.org/10.1029/JB088iS02p0A819.","productDescription":"11 p.","startPage":"A819","endPage":"A829","costCenters":[],"links":[{"id":221660,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"88","issue":"S02","noUsgsAuthors":false,"publicationDate":"2012-09-21","publicationStatus":"PW","scienceBaseUri":"505b989de4b08c986b31c0d0","contributors":{"authors":[{"text":"Morgan, J. W.","contributorId":92384,"corporation":false,"usgs":true,"family":"Morgan","given":"J.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":360988,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wandless, G.A.","contributorId":107716,"corporation":false,"usgs":true,"family":"Wandless","given":"G.A.","affiliations":[],"preferred":false,"id":360989,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70011412,"text":"70011412 - 1983 - Determination of elements in National Bureau of Standards' geological reference materials SRM 278 obsidian and SRM 688 basalt by inductively coupled argon plasma-atomic emission spectrometry","interactions":[],"lastModifiedDate":"2023-11-17T12:04:06.495278","indexId":"70011412","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1821,"text":"Geostandards Newsletter","active":true,"publicationSubtype":{"id":10}},"title":"Determination of elements in National Bureau of Standards' geological reference materials SRM 278 obsidian and SRM 688 basalt by inductively coupled argon plasma-atomic emission spectrometry","docAbstract":"

Two new geologic reference materials, issued by the National Bureau of Standards as standard reference materials, have been analyzed by a precise, accurate, and rapid method of analysis for their element content. The described procedure uses a multi‐acid, low temperature digestion in a closed teflon vessel, followed by the simultaneous determination of 50 elements by inductively coupled argon plasma‐optical emission spectrometry. A preconcentration procedure was applied to a separate digestion for the accurate and precise determination of the rare earth elements. Average concentrations of 39 elements for SRM 278 obsidian and 36 elements for SRM 688 basalt are reported. The results for most elements are in good agreement with the certified values and those reported in the literature. Data for as many as 12 elements are reported for these samples for the first time.

","language":"English","publisher":"Wiley","doi":"10.1111/j.1751-908X.1983.tb00395.x","usgsCitation":"Crock, J., Lichte, F., and Briggs, P., 1983, Determination of elements in National Bureau of Standards' geological reference materials SRM 278 obsidian and SRM 688 basalt by inductively coupled argon plasma-atomic emission spectrometry: Geostandards Newsletter, v. 7, no. 2, p. 335-340, https://doi.org/10.1111/j.1751-908X.1983.tb00395.x.","productDescription":"6 p.","startPage":"335","endPage":"340","numberOfPages":"6","costCenters":[],"links":[{"id":220835,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"7","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-05-31","publicationStatus":"PW","scienceBaseUri":"5059ffa3e4b0c8380cd4f2da","contributors":{"authors":[{"text":"Crock, J.G.","contributorId":58236,"corporation":false,"usgs":true,"family":"Crock","given":"J.G.","email":"","affiliations":[],"preferred":false,"id":361022,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lichte, F.E.","contributorId":99108,"corporation":false,"usgs":true,"family":"Lichte","given":"F.E.","affiliations":[],"preferred":false,"id":361023,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Briggs, Paul H.","contributorId":107691,"corporation":false,"usgs":true,"family":"Briggs","given":"Paul H.","affiliations":[],"preferred":false,"id":361024,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70011418,"text":"70011418 - 1983 - Cuprian fraipontite and sauconite from the Defiance-Silver Bill mines, Gleeson, Arizona.","interactions":[],"lastModifiedDate":"2012-03-12T17:18:29","indexId":"70011418","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2749,"text":"Mineralogical Record","active":true,"publicationSubtype":{"id":10}},"title":"Cuprian fraipontite and sauconite from the Defiance-Silver Bill mines, Gleeson, Arizona.","docAbstract":"XRD studies have shown the fine-grained, light blue-green mineral previously identified as turquoise or chrysocolla to be the rare species fraipontite + or - admixed sauconite. Composite microprobe and XRF analyses gave SiO2 24.8, Al2O3 17.3, CaO 0.34, CuO 5.2, ZnO 40.95, H2O (ign. loss, 900oC) 12.8, = 101.39, yielding the formula (Zn1.84Al0.77Cu0.24box 0.13- Ca0.02)3.00(Si1.51Al0.49)2.00O5(OH)4. Semiquantitative emission spectrographic analysis showed Fe 0.007, Mg 0.01, Ca 0.07, Si 10, Al major, Na 0.015, Zn major, Cu 5%; Mn 15, B 150, Be 7, Ni 50, Pb 15, Sc 15, Ga 70 and Ag 1 ppm. It has a 5.331(8), b 9.23(1), c 7.275(6) A, beta 104.15o; H. 3.5-4; Dcalc 3.44, Dobs. 3.08- 3.10; mean refr. ind. approx 1.61. Much of the fraipontite is admixed with sauconite, which may be forming from the fraipontite. XRF analysis of this material gave SiO2 32.8, Al2O3 10.9, MgO < 0.1, CaO 1.51, Na2O < 0.2, K2O < 0.02, TiO2 < 0.02, P2O5 < 0.02, MnO < 0.02, CuO 4.65, ZnO 39.9, ign. loss 13.9, = 103.7.-G.W.R.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Mineralogical Record","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"00264628","usgsCitation":"Foord, E., Taggart, J.E., and Conklin, N.M., 1983, Cuprian fraipontite and sauconite from the Defiance-Silver Bill mines, Gleeson, Arizona.: Mineralogical Record, v. 14, no. 2, p. 131-132.","startPage":"131","endPage":"132","numberOfPages":"2","costCenters":[],"links":[{"id":220905,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"14","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fd0ce4b0c8380cd4e5e2","contributors":{"authors":[{"text":"Foord, E.E.","contributorId":86835,"corporation":false,"usgs":true,"family":"Foord","given":"E.E.","email":"","affiliations":[],"preferred":false,"id":361038,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Taggart, J. E.","contributorId":14829,"corporation":false,"usgs":true,"family":"Taggart","given":"J.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":361037,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Conklin, N. M.","contributorId":100398,"corporation":false,"usgs":true,"family":"Conklin","given":"N.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":361039,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70011201,"text":"70011201 - 1983 - Orickite and coyoteite, two new sulfide minerals from Coyote Peak, Humboldt County, California.","interactions":[],"lastModifiedDate":"2013-02-14T10:13:38","indexId":"70011201","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":738,"text":"American Mineralogist","active":true,"publicationSubtype":{"id":10}},"title":"Orickite and coyoteite, two new sulfide minerals from Coyote Peak, Humboldt County, California.","docAbstract":"Minute quantities of orickite and coyoteite occur with rare alkali iron sulphides in a mafic alkalic diatreme near Orick, Humboldt County. Orickite, NaxKyCu0.95Fe1.06zH2O (x,y < 0.03, z < 0.5), is hexagonal, a 3.695, c 6.16 A, D 4.212 g/cm3, Z = 4. The strongest XRD reflections are 3.08(100), 3.20(90), 2.84(60), 1.73(55), 1.583(30) A. The mineral is brass yellow, opaque, weakly pleochroic, but strongly anisotropic (greyish brown to greyish blue) in reflected light. Orickite is compositionally near to Fe-rich chalcopyrite, but it may be related to synthetic chalcogenides with a distorted wurtzite-(2H) structure. Coyoteite, NaFe3S5.2H2O, is triclinic, P1 or P1, a 7.409(8), b 9.881(6), c 6.441(3) A, alpha 100o25(3)', beta 104o37(5)', gamma 81o29(5)', D 2.879 g/cm3, Z = 2; strongest XRD reflections are 5.12(100), 7.13(90), 3.028(80), 3.080(70), 9.6(60), 5.60(60) A. Coyoteite is black, opaque, weakly pleochroic (pale brownish grey) and strongly anisotropic (grey to dull golden orange) in reflected light. It is unstable under normal atmospheric conditions. -J.A.Z.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"American Mineralogist","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Mineralogical Society of America","issn":"0003004X","usgsCitation":"Erd, R.C., and Czamanske, G., 1983, Orickite and coyoteite, two new sulfide minerals from Coyote Peak, Humboldt County, California.: American Mineralogist, v. 68, no. 1-2, p. 245-254.","startPage":"245","endPage":"254","numberOfPages":"10","costCenters":[],"links":[{"id":267378,"type":{"id":11,"text":"Document"},"url":"https://www.minsocam.org/ammin/AM68/AM68_245.pdf"},{"id":221650,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"68","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a708ee4b0c8380cd760c0","contributors":{"authors":[{"text":"Erd, Richard C.","contributorId":89899,"corporation":false,"usgs":true,"family":"Erd","given":"Richard","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":360524,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Czamanske, G.K.","contributorId":26300,"corporation":false,"usgs":true,"family":"Czamanske","given":"G.K.","email":"","affiliations":[],"preferred":false,"id":360523,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70011321,"text":"70011321 - 1983 - Nontronite from a low-temperature hydrothermal system on the Juan de Fuca Ridge","interactions":[],"lastModifiedDate":"2023-12-10T22:03:42.205271","indexId":"70011321","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1427,"text":"Earth and Planetary Science Letters","active":true,"publicationSubtype":{"id":10}},"title":"Nontronite from a low-temperature hydrothermal system on the Juan de Fuca Ridge","docAbstract":"

A deposit of Fe-rich, Al-poor, hydrothermal nontronite was recovered from the Juan de Fuca Ridge. Analyses show the deposit to be mineralogically and chemically similar to nontronite described at other oceanic localities. The deposit is located near the tip of a propagating segment of the Juan de Fuca Ridge. Rare earth elements and Sr isotopes indicate that the nontronite precipitated from seawater. A formation temperature of 57°C is suggested by oxygen isotopic composition. The low-temperature nontronite deposits apparently form from newly established hydrothermal systems associated with the propagating rift segment. More mature hydrothermal systems that deposit sulfide on the seafloor may develop from these low-temperature systems.

","language":"English","publisher":"Elsevier","doi":"10.1016/0012-821X(83)90172-3","issn":"0012821X","usgsCitation":"Murnane, R., and Clague, D., 1983, Nontronite from a low-temperature hydrothermal system on the Juan de Fuca Ridge: Earth and Planetary Science Letters, v. 65, no. 2, p. 343-352, https://doi.org/10.1016/0012-821X(83)90172-3.","productDescription":"10 p.","startPage":"343","endPage":"352","numberOfPages":"10","costCenters":[],"links":[{"id":221654,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"65","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a67b7e4b0c8380cd73469","contributors":{"authors":[{"text":"Murnane, R.","contributorId":60914,"corporation":false,"usgs":true,"family":"Murnane","given":"R.","email":"","affiliations":[],"preferred":false,"id":360835,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Clague, D.A.","contributorId":36129,"corporation":false,"usgs":true,"family":"Clague","given":"D.A.","email":"","affiliations":[],"preferred":false,"id":360834,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ]}