No abstract available.
","language":"English","publisher":"SPEM","doi":"10.2113/gsecongeo.70.8.1487","usgsCitation":"Berger, B.R., Silberman, M., and Koski, R.A., 1975, Discussion on K-Ar relations of granodiorite emplacement and tungsten and gold mineralization near the Getchell Mine, Humboldt County, Nevada: A reply: Economic Geology, v. 70, no. 8, p. 1487-1491, https://doi.org/10.2113/gsecongeo.70.8.1487.","productDescription":"5 p.","startPage":"1487","endPage":"1491","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":374837,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Nevada","county":"Humboldt","otherGeospatial":"Getchell Mine","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -117.92724609375,\n 40.094882122321145\n ],\n [\n -117.103271484375,\n 40.094882122321145\n ],\n [\n -117.103271484375,\n 41.393294288784865\n ],\n [\n -117.92724609375,\n 41.393294288784865\n ],\n [\n -117.92724609375,\n 40.094882122321145\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"70","issue":"8","noUsgsAuthors":false,"publicationDate":"1975-12-01","publicationStatus":"PW","contributors":{"authors":[{"text":"Berger, B. R.","contributorId":77914,"corporation":false,"usgs":true,"family":"Berger","given":"B.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":789198,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Silberman, M.L.","contributorId":10013,"corporation":false,"usgs":true,"family":"Silberman","given":"M.L.","affiliations":[],"preferred":false,"id":789199,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Koski, Randolph A. rkoski@usgs.gov","contributorId":2949,"corporation":false,"usgs":true,"family":"Koski","given":"Randolph","email":"rkoski@usgs.gov","middleInitial":"A.","affiliations":[],"preferred":true,"id":789200,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70209952,"text":"70209952 - 1975 - Chemical halos as guides to lode deposit ore in the Park City District, Utah","interactions":[],"lastModifiedDate":"2020-05-07T12:25:16.612539","indexId":"70209952","displayToPublicDate":"1975-05-06T14:51:02","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1472,"text":"Economic Geology","active":true,"publicationSubtype":{"id":10}},"title":"Chemical halos as guides to lode deposit ore in the Park City District, Utah","docAbstract":"No abstract available.
","language":"English","publisher":"SPEM","doi":"10.2113/gsecongeo.70.5.995","usgsCitation":"Chaffee, M.A., 1975, Chemical halos as guides to lode deposit ore in the Park City District, Utah: Economic Geology, v. 70, no. 5, p. 995-995, https://doi.org/10.2113/gsecongeo.70.5.995.","productDescription":"1 p.","startPage":"995","endPage":"995","costCenters":[{"id":171,"text":"Central Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"links":[{"id":374503,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Utah","otherGeospatial":"Park City District","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -111.64443969726562,\n 40.54093880017256\n ],\n [\n -111.37390136718749,\n 40.54093880017256\n ],\n [\n -111.37390136718749,\n 40.75037808986467\n ],\n [\n -111.64443969726562,\n 40.75037808986467\n ],\n [\n -111.64443969726562,\n 40.54093880017256\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"70","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Chaffee, Maurice A. mchaffee@usgs.gov","contributorId":4047,"corporation":false,"usgs":true,"family":"Chaffee","given":"Maurice","email":"mchaffee@usgs.gov","middleInitial":"A.","affiliations":[{"id":171,"text":"Central Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":788607,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70209870,"text":"70209870 - 1975 - Preparation and use of isopleth maps of landslide deposits: Comment and reply: REPLY","interactions":[],"lastModifiedDate":"2020-05-01T19:21:58.803319","indexId":"70209870","displayToPublicDate":"1975-05-01T14:09:01","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"title":"Preparation and use of isopleth maps of landslide deposits: Comment and reply: REPLY","docAbstract":"No abstract available.
","language":"English","publisher":"GSA","doi":"10.1130/0091-7613(1975)3<217b:PAUOIM>2.0.CO;2","usgsCitation":"Wright, R.H., Campbell, R.H., and Nilsen, T.H., 1975, Preparation and use of isopleth maps of landslide deposits: Comment and reply: REPLY: Geology, v. 3, no. 4, p. 217-218, https://doi.org/10.1130/0091-7613(1975)3<217b:PAUOIM>2.0.CO;2.","productDescription":"2 p.","startPage":"217","endPage":"218","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":374435,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"3","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Wright, R. H.","contributorId":101629,"corporation":false,"usgs":true,"family":"Wright","given":"R.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":788338,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Campbell, R. H.","contributorId":52160,"corporation":false,"usgs":true,"family":"Campbell","given":"R.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":788339,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nilsen, T. H.","contributorId":93057,"corporation":false,"usgs":true,"family":"Nilsen","given":"T.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":788340,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70232593,"text":"70232593 - 1975 - A procedure, using hydrofluoric acid, for quantitative mineral separations from silicate rocks","interactions":[],"lastModifiedDate":"2022-07-07T18:12:38.43118","indexId":"70232593","displayToPublicDate":"1975-05-01T13:06:00","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"A procedure, using hydrofluoric acid, for quantitative mineral separations from silicate rocks","docAbstract":"Some minerals of silicate rocks can be quantitatively recovered from rock fragments by prolonged digestion in cold, concentrated hydrofluoric acid. The procedure yields clean, physically unharmed crystals, mostly of minerals that occur largely or only in trace amounts.
","language":"English","publisher":"U. S. Geological Survey","usgsCitation":"Neuerburg, G.J., 1975, A procedure, using hydrofluoric acid, for quantitative mineral separations from silicate rocks: Journal of Research of the U.S. Geological Survey, v. 3, no. 3, p. 377-378.","productDescription":"2 p.","startPage":"377","endPage":"378","costCenters":[],"links":[{"id":403195,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403193,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue3/report.pdf","size":"22359 KB","linkFileType":{"id":1,"text":"pdf"}}],"volume":"3","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Neuerburg, George J.","contributorId":103661,"corporation":false,"usgs":true,"family":"Neuerburg","given":"George","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":846029,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70232592,"text":"70232592 - 1975 - A computer-assisted procedure for information processing of geologic field data","interactions":[],"lastModifiedDate":"2022-07-08T15:42:36.819373","indexId":"70232592","displayToPublicDate":"1975-05-01T12:50:53","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"A computer-assisted procedure for information processing of geologic field data","docAbstract":"We have examined several computer systems to see how they could aid information processing of geologic field data. The processing procedure we have chosen combines a systematic note-taking technique, a computer text-editor for creating files of data, and automated printing of selected data or of complete file copies. Traditional text notes are the foundation of each station record, and no coding of data is required. The text-editor used is an interactive computer system that allows any individual with typing skills to build and use data files. On the basis of our experience, an interactive text-editor can readily fulfill the data-handling needs of most geologic field projects and offers important advantages over other systems that were examined.
","language":"English","publisher":"U. S. Geological Survey","usgsCitation":"Hudson, T., Askevold, G., and Plafker, G., 1975, A computer-assisted procedure for information processing of geologic field data: Journal of Research of the U.S. Geological Survey, v. 3, no. 3, p. 369-375.","productDescription":"7 p.","startPage":"369","endPage":"375","costCenters":[],"links":[{"id":403191,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403190,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue3/report.pdf","size":"22359 KB","linkFileType":{"id":1,"text":"pdf"}}],"volume":"3","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Hudson, Travis","contributorId":90282,"corporation":false,"usgs":true,"family":"Hudson","given":"Travis","affiliations":[],"preferred":false,"id":846026,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Askevold, Gerald","contributorId":292879,"corporation":false,"usgs":false,"family":"Askevold","given":"Gerald","email":"","affiliations":[],"preferred":false,"id":846027,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Plafker, George","contributorId":3920,"corporation":false,"usgs":false,"family":"Plafker","given":"George","email":"","affiliations":[],"preferred":false,"id":846028,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70232591,"text":"70232591 - 1975 - A characteristic pattern of disequilibrium in some uranium ore deposits","interactions":[],"lastModifiedDate":"2022-07-07T17:35:14.903215","indexId":"70232591","displayToPublicDate":"1975-05-01T12:29:24","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"A characteristic pattern of disequilibrium in some uranium ore deposits","docAbstract":"A redistribution of radium-226 in uranium ore deposits produces a characteristic pattern of disequilibrium in which uranium is greater than equivalent uranium in high-grade samples and equivalent uranium is greater than uranium in low-grade samples. The redistribution is a continuous process in uranium deposits, and the resulting pattern of disequilibrium is itself a system in equilibrium.
","language":"English","publisher":"U. S. Geological Survey","usgsCitation":"Santos, E.S., 1975, A characteristic pattern of disequilibrium in some uranium ore deposits: Journal of Research of the U.S. Geological Survey, v. 3, no. 3, p. 363-368.","productDescription":"6 p.","startPage":"363","endPage":"368","costCenters":[],"links":[{"id":403189,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403188,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue3/report.pdf","size":"22359 KB","linkFileType":{"id":1,"text":"pdf"}}],"volume":"3","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Santos, Elmer S.","contributorId":94312,"corporation":false,"usgs":true,"family":"Santos","given":"Elmer","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":846025,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70232590,"text":"70232590 - 1975 - Rockfall seismicity correlation with field observations, Makaopuhi Crater, Kilauea Volcano, Hawaii","interactions":[],"lastModifiedDate":"2022-07-08T15:43:42.358551","indexId":"70232590","displayToPublicDate":"1975-05-01T12:12:38","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"Rockfall seismicity correlation with field observations, Makaopuhi Crater, Kilauea Volcano, Hawaii","docAbstract":"During August 7-13, 1972, intense and sustained rockfall activity occurred in Makaopuhi Crater on the east-rift zone of Kilauea Volcano. In a 4-day period (August 7-10), approximately 270,000 m3 of rockfall debris accumulated in Makaopuhi's west pit, representing a total kinetic energy release of about 101B ergs. Because the rockfalls happened within an area with an established seismic network, it was possible to correlate the seismic record of the rockfalls with onsite field observations. The seismic signatures of rockfalls are generally distinguishable from those of earthquakes and other recorded events. Approximate magnitudes determined for some of the largest rockfalls range from 0.8 to 1.2, corresponding to calculated seismic energy releases of 2X1011 to 10X1011 ergs, if the magnitude-energy relationship for earthquakes is applicable to rockfalls. The August 1972 swarms of rockfalls at Makaopuhi correlate in time not with moderate or large earthquakes but rather with local eruptive activity and are inferred to have been caused by eruption-induced modifications of stress patterns of the crater walls. However, the amount and nature of the stress change required to exceed the threshold stability of the crater wall and to trigger a rockfall flurry cannot be determined. The Makaopuhi activity is typical of most major rockfall episodes in other Kilauean pit craters in recent years, which also have been associated with volcanic activity, particularly during times of changes in eruptive behavior.
","language":"English","publisher":"U.S. Geological Survey","usgsCitation":"Tilling, R.I., Koyanagi, R.Y., and Holcomb, R.T., 1975, Rockfall seismicity correlation with field observations, Makaopuhi Crater, Kilauea Volcano, Hawaii: Journal of Research of the U.S. Geological Survey, v. 3, no. 3, p. 345-361.","productDescription":"17 p.","startPage":"345","endPage":"361","costCenters":[],"links":[{"id":403186,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403184,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue3/report.pdf","size":"22359 KB","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Hawai'i","otherGeospatial":"Kilauea Volcano, Makaopuhi Crater","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -155.16729354858398,\n 19.35985853308795\n ],\n [\n -155.16458988189697,\n 19.36062781661234\n ],\n [\n -155.16240119934082,\n 19.362409301365904\n ],\n [\n -155.16175746917725,\n 19.363866865322365\n ],\n [\n -155.16167163848874,\n 19.365526852845328\n ],\n [\n -155.16252994537354,\n 19.36767266532593\n ],\n [\n -155.16390323638916,\n 19.368684831219216\n ],\n [\n -155.16570568084717,\n 19.369373100436274\n ],\n [\n -155.16669273376465,\n 19.369332614092194\n ],\n [\n -155.16634941101074,\n 19.370020880573616\n ],\n [\n -155.16772270202637,\n 19.370466227924478\n ],\n [\n -155.16982555389404,\n 19.370223311338513\n ],\n [\n -155.17119884490967,\n 19.36908969581655\n ],\n [\n -155.17343044281006,\n 19.369494559408146\n ],\n [\n -155.17596244812012,\n 19.36908969581655\n ],\n [\n -155.17755031585693,\n 19.367146336577406\n ],\n [\n -155.17712116241455,\n 19.364960029737954\n ],\n [\n -155.1756191253662,\n 19.363300036443277\n ],\n [\n -155.17197132110596,\n 19.361194654781624\n ],\n [\n -155.16729354858398,\n 19.35985853308795\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Tilling, Robert I. 0000-0003-4263-7221 rtilling@usgs.gov","orcid":"https://orcid.org/0000-0003-4263-7221","contributorId":2567,"corporation":false,"usgs":true,"family":"Tilling","given":"Robert","email":"rtilling@usgs.gov","middleInitial":"I.","affiliations":[],"preferred":true,"id":846022,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Koyanagi, Robert Y.","contributorId":52561,"corporation":false,"usgs":true,"family":"Koyanagi","given":"Robert","email":"","middleInitial":"Y.","affiliations":[],"preferred":false,"id":846023,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Holcomb, Robin T.","contributorId":46938,"corporation":false,"usgs":true,"family":"Holcomb","given":"Robin","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":846024,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70232542,"text":"70232542 - 1975 - Relations between thermal, photographic, and topographic linears and mapped and measured structures in a Precambrian terrane in Colorado","interactions":[],"lastModifiedDate":"2022-07-06T16:54:14.189843","indexId":"70232542","displayToPublicDate":"1975-05-01T11:43:11","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"Relations between thermal, photographic, and topographic linears and mapped and measured structures in a Precambrian terrane in Colorado","docAbstract":"Comparison of orientation of faults, foliations, and joints, observed during geologic mapping in Colorado, with thermal, photographic, and topographic linears shows that topographic linears are statistically useful indicators of mappable faults and fractures, photographic linears are less useful, and thermal linears, believed to represent zones of moisture concentration, are parallel to faults, foliations, and, a statistically minor, but more open joint set.
","language":"English","publisher":"U. S. Geological Survey","usgsCitation":"Bryant, B., Offield, T., and Schmidt, P.W., 1975, Relations between thermal, photographic, and topographic linears and mapped and measured structures in a Precambrian terrane in Colorado: Journal of Research of the U.S. Geological Survey, v. 3, no. 3, p. 295-303.","productDescription":"9 p.","startPage":"295","endPage":"303","costCenters":[],"links":[{"id":403077,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403076,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue3/report.pdf","size":"22359 KB","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Colorado","city":"Evergreen","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -105.47561645507812,\n 39.6088622615816\n ],\n [\n -105.1666259765625,\n 39.6088622615816\n ],\n [\n -105.1666259765625,\n 39.90657598772839\n ],\n [\n -105.47561645507812,\n 39.90657598772839\n ],\n [\n -105.47561645507812,\n 39.6088622615816\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Bryant, Bruce bbryant@usgs.gov","contributorId":1355,"corporation":false,"usgs":true,"family":"Bryant","given":"Bruce","email":"bbryant@usgs.gov","affiliations":[],"preferred":false,"id":845894,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Offield, Terry W.","contributorId":64217,"corporation":false,"usgs":true,"family":"Offield","given":"Terry W.","affiliations":[],"preferred":false,"id":845895,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Schmidt, Paul W.","contributorId":61160,"corporation":false,"usgs":true,"family":"Schmidt","given":"Paul","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":845896,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70232589,"text":"70232589 - 1975 - The influence of late Cenozoic stratigraphy on distribution of impoundment-related seismicity at Lake Mead, Nevada-Arizona","interactions":[],"lastModifiedDate":"2022-07-07T17:04:40.345225","indexId":"70232589","displayToPublicDate":"1975-05-01T11:35:38","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"The influence of late Cenozoic stratigraphy on distribution of impoundment-related seismicity at Lake Mead, Nevada-Arizona","docAbstract":"At Lake Mead, contrasts in permeability of upper Cenozoic sediments show a better correlation with irregularly distributed impoundment-related seismicity than do contrasts in structure. An evaluation of structures developed during the late Cenozoic fails to explain the erratic distribution of seismicity. An evaluation of the late Cenozoic stratigraphy, however, shows a concentration of relatively impermeable evaporite beds and fine-grained clastic strata in the less seismic part of the lake basin; therefore, the authors conclude that a hydraulic connection between the lake water and the deep aquifer system that includes buried faults is needed in the Lake Mead area to cause the release of seismic energy. Where hydraulic connection is prevented by continuous or quasi-continuous upper Cenozoic basin-fill strata of low permeability, as in the eastern basin area, seismicity does not occur.
","language":"English","publisher":"U. S. Geological Survey","usgsCitation":"Anderson, R.E., and Laney, R., 1975, The influence of late Cenozoic stratigraphy on distribution of impoundment-related seismicity at Lake Mead, Nevada-Arizona: Journal of Research of the U.S. Geological Survey, v. 3, no. 3, p. 337-343.","productDescription":"7 p.","startPage":"337","endPage":"343","costCenters":[],"links":[{"id":403183,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403182,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue3/report.pdf","size":"22359 KB","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Arizona, Nevada","otherGeospatial":"Lake Mead","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -114.82292175292969,\n 36.05520550221327\n ],\n [\n -114.80918884277344,\n 36.03855017779992\n ],\n [\n -114.79751586914061,\n 36.032997620005034\n ],\n [\n -114.78103637695311,\n 36.01855913779351\n ],\n [\n -114.75906372070312,\n 36.017448375720896\n ],\n [\n -114.7364044189453,\n 36.02855529192086\n ],\n [\n -114.74464416503906,\n 36.01800375871416\n ],\n [\n -114.73159790039062,\n 36.01244975266108\n ],\n [\n -114.7137451171875,\n 36.029110596631874\n ],\n [\n -114.70138549804688,\n 36.03133177633187\n ],\n [\n -114.70275878906249,\n 36.04021586880111\n ],\n [\n -114.7137451171875,\n 36.056315731884695\n ],\n [\n -114.71511840820312,\n 36.06852722451617\n ],\n [\n -114.70962524414062,\n 36.07629718752892\n ],\n [\n -114.68490600585938,\n 36.08184669113895\n ],\n [\n -114.67048645019531,\n 36.0907250822317\n ],\n [\n -114.66773986816406,\n 36.10459556076901\n ],\n [\n -114.65744018554686,\n 36.10404078863735\n ],\n [\n -114.64645385742189,\n 36.10404078863735\n ],\n [\n -114.64027404785155,\n 36.121236902880185\n ],\n [\n -114.6306610107422,\n 36.12401011705408\n ],\n [\n -114.61349487304686,\n 36.116799556444995\n ],\n [\n -114.59152221679688,\n 36.12234620030518\n ],\n [\n -114.58671569824217,\n 36.131774595564394\n ],\n [\n -114.57778930664062,\n 36.132883744079486\n ],\n [\n -114.57229614257812,\n 36.14341987311765\n ],\n [\n -114.55581665039061,\n 36.14397436703243\n ],\n [\n -114.54071044921875,\n 36.13565654678543\n ],\n [\n -114.53521728515625,\n 36.12234620030518\n ],\n [\n -114.52079772949219,\n 36.08795069273044\n ],\n [\n -114.49882507324219,\n 36.08739580307919\n ],\n [\n -114.48028564453125,\n 36.07962693669393\n ],\n [\n -114.47753906249999,\n 36.071857302655054\n ],\n [\n -114.48028564453125,\n 36.06297678099834\n ],\n [\n -114.47616577148438,\n 36.04243673532787\n ],\n [\n -114.45762634277344,\n 36.03188706147076\n ],\n [\n -114.44801330566406,\n 36.049098959065645\n ],\n [\n -114.43290710449219,\n 36.06297678099834\n ],\n [\n -114.41848754882812,\n 36.07851703597173\n ],\n [\n -114.40475463867188,\n 36.071857302655054\n ],\n [\n -114.39857482910155,\n 36.08517620530504\n ],\n [\n -114.38896179199219,\n 36.09904766316007\n ],\n [\n -114.39102172851561,\n 36.109588333654656\n ],\n [\n -114.38827514648438,\n 36.117908916563685\n ],\n [\n -114.37522888183592,\n 36.11458078918906\n ],\n [\n -114.36767578124999,\n 36.10071207357713\n ],\n [\n -114.35325622558594,\n 36.10126686921446\n ],\n [\n -114.35600280761719,\n 36.086286012025894\n ],\n [\n -114.34707641601562,\n 36.08295654486136\n ],\n [\n -114.35600280761719,\n 36.06908224732973\n ],\n [\n -114.345703125,\n 36.06963726622717\n ],\n [\n -114.34158325195312,\n 36.05520550221327\n ],\n [\n -114.34844970703125,\n 36.0529849958843\n ],\n [\n -114.35531616210938,\n 36.03632920165807\n ],\n [\n -114.32991027832031,\n 36.03410816288115\n ],\n [\n -114.31961059570312,\n 36.023557373379276\n ],\n [\n -114.30587768554686,\n 36.02189133007692\n ],\n [\n -114.29832458496092,\n 36.03188706147076\n ],\n [\n -114.28802490234375,\n 36.02244668175846\n ],\n [\n -114.29008483886717,\n 36.011894330530374\n ],\n [\n -114.25300598144531,\n 35.993007649650664\n ],\n [\n -114.2303466796875,\n 35.9974519815276\n ],\n [\n -114.17610168457031,\n 36.01855913779351\n ],\n [\n -114.15481567382812,\n 36.00745081259696\n ],\n [\n -114.13284301757812,\n 36.00522895970755\n ],\n [\n -114.11636352539062,\n 36.005784428799934\n ],\n [\n -114.11979675292969,\n 36.02633403393367\n ],\n [\n -114.11636352539062,\n 36.04188152456856\n ],\n [\n -114.09919738769531,\n 36.066307094101006\n ],\n [\n -114.08821105957031,\n 36.097938036628065\n ],\n [\n -114.07859802246094,\n 36.122900843139995\n ],\n [\n -114.08065795898438,\n 36.136765640434554\n ],\n [\n -114.06417846679686,\n 36.15672664526235\n ],\n [\n -114.06074523925781,\n 36.17723682850498\n ],\n [\n -114.05113220214844,\n 36.16892253622743\n ],\n [\n -114.03053283691406,\n 36.17280264906953\n ],\n [\n -114.00993347167967,\n 36.18721281473179\n ],\n [\n -114.01130676269531,\n 36.16615090943873\n ],\n [\n -113.99345397949217,\n 36.161716102717776\n ],\n [\n -113.99620056152344,\n 36.131774595564394\n ],\n [\n -114.00787353515625,\n 36.12733784475041\n ],\n [\n -114.01199340820312,\n 36.107924111286465\n ],\n [\n -114.00169372558592,\n 36.10071207357713\n ],\n [\n -113.98727416992188,\n 36.110143066608245\n ],\n [\n -113.96804809570312,\n 36.10515032898299\n ],\n [\n -113.94676208496092,\n 36.12345548205631\n ],\n [\n -113.93577575683594,\n 36.122900843139995\n ],\n [\n -113.92684936523438,\n 36.13842925151492\n ],\n [\n -113.95088195800781,\n 36.14120185826493\n ],\n [\n -113.961181640625,\n 36.14951909060777\n ],\n [\n -113.95843505859375,\n 36.15838983302817\n ],\n [\n -113.97010803222655,\n 36.17612830717087\n ],\n [\n -113.98384094238281,\n 36.18499603869524\n ],\n [\n -113.99070739746094,\n 36.194971036764976\n ],\n [\n -113.99757385253906,\n 36.19995805932895\n ],\n [\n -113.98658752441405,\n 36.2165791734887\n ],\n [\n -113.99620056152344,\n 36.227104053202574\n ],\n [\n -113.99414062499999,\n 36.23596601135999\n ],\n [\n -114.00032043457031,\n 36.26199220445664\n ],\n [\n -114.0106201171875,\n 36.26309950975007\n ],\n [\n -114.01542663574219,\n 36.24704204661377\n ],\n [\n -114.03121948242188,\n 36.23208902824811\n ],\n [\n -114.02641296386719,\n 36.21602519322386\n ],\n [\n -114.02091979980469,\n 36.20439070158873\n ],\n [\n -114.03190612792969,\n 36.202728490156034\n ],\n [\n -114.04701232910156,\n 36.213255233061844\n ],\n [\n -114.06280517578125,\n 36.20826905765868\n ],\n [\n -114.09027099609375,\n 36.159498605271835\n ],\n [\n -114.09782409667969,\n 36.16615090943873\n ],\n [\n -114.11155700683594,\n 36.15838983302817\n ],\n [\n -114.12872314453125,\n 36.12234620030518\n ],\n [\n -114.14451599121094,\n 36.11180724196127\n ],\n [\n -114.15756225585936,\n 36.081291758402664\n ],\n [\n -114.158935546875,\n 36.05742594589385\n ],\n [\n -114.15138244628906,\n 36.04632310102275\n ],\n [\n -114.16099548339844,\n 36.03855017779992\n ],\n [\n -114.20906066894531,\n 36.02966589742849\n ],\n [\n -114.22622680664062,\n 36.03632920165807\n ],\n [\n -114.23995971679688,\n 36.05964632692448\n ],\n [\n -114.25987243652344,\n 36.071857302655054\n ],\n [\n -114.27841186523438,\n 36.08073682174974\n ],\n [\n -114.28321838378906,\n 36.09849285185278\n ],\n [\n -114.30038452148438,\n 36.11402608757969\n ],\n [\n -114.32029724121094,\n 36.12234620030518\n ],\n [\n -114.32922363281249,\n 36.13510199408225\n ],\n [\n -114.3511962890625,\n 36.157281045104284\n ],\n [\n -114.36630249023438,\n 36.16448788632064\n ],\n [\n -114.37454223632812,\n 36.17668256979835\n ],\n [\n -114.37110900878906,\n 36.18111652966561\n ],\n [\n -114.3731689453125,\n 36.18942952802744\n ],\n [\n -114.38484191894531,\n 36.20051215333818\n ],\n [\n -114.37385559082031,\n 36.221564819353084\n ],\n [\n -114.36904907226562,\n 36.26420679934512\n ],\n [\n -114.36286926269531,\n 36.274725267505474\n ],\n [\n -114.36904907226562,\n 36.29077703961915\n ],\n [\n -114.36286926269531,\n 36.30073854794736\n ],\n [\n -114.36424255371094,\n 36.32231745182177\n ],\n [\n -114.35943603515625,\n 36.33614694088851\n ],\n [\n -114.35050964355469,\n 36.35052700542763\n ],\n [\n -114.34089660644531,\n 36.377620677623874\n ],\n [\n -114.31480407714844,\n 36.3986256015574\n ],\n [\n -114.3072509765625,\n 36.419624850003046\n ],\n [\n -114.32029724121094,\n 36.44117080741499\n ],\n [\n -114.32991027832031,\n 36.45497917290675\n ],\n [\n -114.312744140625,\n 36.45387459411652\n ],\n [\n -114.312744140625,\n 36.46215855158897\n ],\n [\n -114.32579040527344,\n 36.46657630040234\n ],\n [\n -114.32510375976562,\n 36.48258852956482\n ],\n [\n -114.31480407714844,\n 36.48755716938576\n ],\n [\n -114.31480407714844,\n 36.49362951863073\n ],\n [\n -114.32304382324219,\n 36.49362951863073\n ],\n [\n -114.32304382324219,\n 36.503565063228024\n ],\n [\n -114.33128356933594,\n 36.51681047284953\n ],\n [\n -114.31892395019531,\n 36.57032090532844\n ],\n [\n -114.33403015136719,\n 36.58190076014938\n ],\n [\n -114.345703125,\n 36.575283912895365\n ],\n [\n -114.35050964355469,\n 36.52619126653696\n ],\n [\n -114.34776306152344,\n 36.51460306198586\n ],\n [\n -114.356689453125,\n 36.51515492060475\n ],\n [\n -114.36424255371094,\n 36.49694150847516\n ],\n [\n -114.37522888183592,\n 36.49914942301417\n ],\n [\n -114.38896179199219,\n 36.512947462517474\n ],\n [\n -114.4068145751953,\n 36.52453591500483\n ],\n [\n -114.42192077636719,\n 36.52950186333475\n ],\n [\n -114.42672729492188,\n 36.49970139181239\n ],\n [\n -114.4061279296875,\n 36.477067444928814\n ],\n [\n -114.39102172851561,\n 36.46933726558023\n ],\n [\n -114.39651489257812,\n 36.4533222988223\n ],\n [\n -114.38896179199219,\n 36.45166538934342\n ],\n [\n -114.37728881835938,\n 36.45553145640271\n ],\n [\n -114.36561584472656,\n 36.44614210212922\n ],\n [\n -114.36149597167969,\n 36.43840883939025\n ],\n [\n -114.39170837402342,\n 36.41188894517379\n ],\n [\n -114.38552856445312,\n 36.405810193726765\n ],\n [\n -114.40132141113281,\n 36.40802070382984\n ],\n [\n -114.40475463867188,\n 36.39696752441776\n ],\n [\n -114.40750122070311,\n 36.38535999403445\n ],\n [\n -114.40818786621094,\n 36.37872634140947\n ],\n [\n -114.41917419433594,\n 36.372092122929686\n ],\n [\n -114.43771362304686,\n 36.355504101382586\n ],\n [\n -114.44595336914061,\n 36.34444345603319\n ],\n [\n -114.43840026855467,\n 36.32176422120382\n ],\n [\n -114.43016052246092,\n 36.312358699869826\n ],\n [\n -114.44664001464842,\n 36.313465290694396\n ],\n [\n -114.444580078125,\n 36.30461212431679\n ],\n [\n -114.41917419433594,\n 36.29963177650553\n ],\n [\n -114.41230773925781,\n 36.293544252859796\n ],\n [\n -114.4232940673828,\n 36.27085020723902\n ],\n [\n -114.42192077636719,\n 36.25867019438799\n ],\n [\n -114.41780090332031,\n 36.251472021249235\n ],\n [\n -114.44320678710938,\n 36.21713314983094\n ],\n [\n -114.45487976074219,\n 36.20051215333818\n ],\n [\n -114.45350646972655,\n 36.182779199919324\n ],\n [\n -114.44801330566406,\n 36.16836821871061\n ],\n [\n -114.45556640625,\n 36.17058546525473\n ],\n [\n -114.46586608886719,\n 36.162824827919664\n ],\n [\n -114.46861267089844,\n 36.16781389727332\n ],\n [\n -114.48577880859375,\n 36.17058546525473\n ],\n [\n -114.52079772949219,\n 36.17446549576358\n ],\n [\n -114.53247070312499,\n 36.16892253622743\n ],\n [\n -114.54826354980469,\n 36.17557404062257\n ],\n [\n -114.5599365234375,\n 36.17668256979835\n ],\n [\n -114.55581665039061,\n 36.15894422111003\n ],\n [\n -114.57023620605467,\n 36.16060736183511\n ],\n [\n -114.58465576171875,\n 36.15672664526235\n ],\n [\n -114.60525512695312,\n 36.15118243124803\n ],\n [\n -114.61280822753905,\n 36.14064734475343\n ],\n [\n -114.61555480957033,\n 36.15173687028867\n ],\n [\n -114.62791442871092,\n 36.155063422216735\n ],\n [\n -114.63340759277344,\n 36.15783544102625\n ],\n [\n -114.64233398437499,\n 36.15894422111003\n ],\n [\n -114.65400695800781,\n 36.15173687028867\n ],\n [\n -114.66087341308592,\n 36.150627988287624\n ],\n [\n -114.664306640625,\n 36.144528857027744\n ],\n [\n -114.6807861328125,\n 36.14120185826493\n ],\n [\n -114.69245910644533,\n 36.146192303496974\n ],\n [\n -114.70275878906249,\n 36.153954587253395\n ],\n [\n -114.71168518066406,\n 36.163933537440606\n ],\n [\n -114.73228454589844,\n 36.15007354140755\n ],\n [\n -114.73228454589844,\n 36.139538305972614\n ],\n [\n -114.75082397460936,\n 36.14508334310362\n ],\n [\n -114.75494384765626,\n 36.14064734475343\n ],\n [\n -114.77897644042969,\n 36.133992876918846\n ],\n [\n -114.80644226074219,\n 36.13565654678543\n ],\n [\n -114.82223510742188,\n 36.136211095569536\n ],\n [\n -114.83047485351561,\n 36.14175636785711\n ],\n [\n -114.840087890625,\n 36.13898378070337\n ],\n [\n -114.84077453613281,\n 36.1312200154285\n ],\n [\n -114.85382080078125,\n 36.13343831245866\n ],\n [\n -114.86343383789061,\n 36.14397436703243\n ],\n [\n -114.88128662109375,\n 36.13898378070337\n ],\n [\n -114.89982604980469,\n 36.12733784475041\n ],\n [\n -114.87236022949219,\n 36.12401011705408\n ],\n [\n -114.86892700195312,\n 36.11458078918906\n ],\n [\n -114.83047485351561,\n 36.09849285185278\n ],\n [\n -114.80987548828125,\n 36.071857302655054\n ],\n [\n -114.82292175292969,\n 36.05520550221327\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Anderson, R. Ernest","contributorId":104484,"corporation":false,"usgs":true,"family":"Anderson","given":"R.","email":"","middleInitial":"Ernest","affiliations":[],"preferred":false,"id":846020,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Laney, R. L.","contributorId":83889,"corporation":false,"usgs":true,"family":"Laney","given":"R. L.","affiliations":[],"preferred":false,"id":846021,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70232588,"text":"70232588 - 1975 - Widespread late glacial and postglacial tephra deposits from Mount St. Helens Volcano, Washington","interactions":[],"lastModifiedDate":"2022-07-07T16:34:32.080625","indexId":"70232588","displayToPublicDate":"1975-05-01T11:25:33","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"Widespread late glacial and postglacial tephra deposits from Mount St. Helens Volcano, Washington","docAbstract":"Pumice layers composing four different groups of tephra beds (termed \"sets\"), whose stratigraphy, age, and trend away from Mount St. Helens are fairly well known, are potentially valuable stratigraphic markers in the northwestern United States and adjacent parts of Canada. All four tephra sets are less than about 18,000 yr old. The oldest set described (set S) is between about 18,000 and 12,000 yr old; the most extensive pumice layers of the set, however, probably are no more than about 13,000 yr old. Relatively voluminous layers in the next younger tephra unit (set J) probably range from slightly less than 12,000 to slightly more than 8,000 yr old; in the overlying set Y, the most extensive layers range from about 4,000 to 3,400 yr old. The largest tephra layers in the youngest tephra set described, set W, are apparently all about 450 yr old. All the extensive tephra deposits were carried chiefly east of Mount St. Helens, and the bulk of them form an arc which extends from north-northeast of the volcano clockwise around to the southeast.
","language":"English","publisher":"U. S. Geological Survey","usgsCitation":"Mullineaux, D., Hyde, J.H., and Rubin, M., 1975, Widespread late glacial and postglacial tephra deposits from Mount St. Helens Volcano, Washington: Journal of Research of the U.S. Geological Survey, v. 3, no. 3, p. 329-335.","productDescription":"7 p.","startPage":"329","endPage":"335","costCenters":[],"links":[{"id":403181,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403180,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue3/report.pdf","size":"22359 KB","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Washington","otherGeospatial":"Mount St. Helens","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -122.19612121582031,\n 46.14939437647686\n ],\n [\n -122.15595245361328,\n 46.152724137540936\n ],\n [\n -122.14393615722655,\n 46.162712212065664\n ],\n [\n -122.1291732788086,\n 46.17436267427271\n ],\n [\n -122.14187622070311,\n 46.190764243215256\n ],\n [\n -122.1411895751953,\n 46.20834889395228\n ],\n [\n -122.14977264404295,\n 46.21642644120982\n ],\n [\n -122.1617889404297,\n 46.227115485868595\n ],\n [\n -122.1786117553711,\n 46.238752301105684\n ],\n [\n -122.18547821044923,\n 46.23732751752229\n ],\n [\n -122.20779418945311,\n 46.244451065485094\n ],\n [\n -122.23217010498048,\n 46.248724750319965\n ],\n [\n -122.24658966064452,\n 46.23732751752229\n ],\n [\n -122.25173950195311,\n 46.228778039111894\n ],\n [\n -122.25173950195311,\n 46.221652456379104\n ],\n [\n -122.25963592529295,\n 46.2114375081839\n ],\n [\n -122.27130889892578,\n 46.207873707116555\n ],\n [\n -122.24658966064452,\n 46.18363372751015\n ],\n [\n -122.25036621093749,\n 46.17032095673059\n ],\n [\n -122.24040985107422,\n 46.162712212065664\n ],\n [\n -122.23079681396483,\n 46.16413893185584\n ],\n [\n -122.22118377685547,\n 46.16199883829574\n ],\n [\n -122.19612121582031,\n 46.14939437647686\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Mullineaux, Donal R.","contributorId":98371,"corporation":false,"usgs":true,"family":"Mullineaux","given":"Donal R.","affiliations":[],"preferred":false,"id":846017,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hyde, Jack H.","contributorId":27441,"corporation":false,"usgs":true,"family":"Hyde","given":"Jack","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":846018,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Rubin, Meyer","contributorId":107283,"corporation":false,"usgs":true,"family":"Rubin","given":"Meyer","email":"","affiliations":[],"preferred":false,"id":846019,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70232587,"text":"70232587 - 1975 - Geology, geochemistry, and fluid-inclusion petrography of the Sapo Alegre porphyry copper prospect and its metavolcanic wallrocks, west-central Puerto Rico","interactions":[],"lastModifiedDate":"2022-07-07T16:24:31.352711","indexId":"70232587","displayToPublicDate":"1975-05-01T11:02:53","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"Geology, geochemistry, and fluid-inclusion petrography of the Sapo Alegre porphyry copper prospect and its metavolcanic wallrocks, west-central Puerto Rico","docAbstract":"The Sapo Alegre prospect, a small porphyry copper-molybdenum occurrence in west-central Puerto Rico, is characterized by distinct zones of alteration and mineralization of quartz diorite porphyry. A biotite-chlorite zone in the porphyry near its contact with surrounding metavolcanic rocks contains copper, molybdenum, gold, silver, selenium, and tellurium. A quartz-sericite-pyrite zone within the porphyry contains abundant sulfur and traces of selenium, but metals of the biotite-chlorite zone are nearly absent and zinc, manganese, nickel, sodium, calcium, and magnesium contents are very low. Quartz grains in the biotite-chlorite zone contain abundant fluid inclusions in which halite crystals are common, whereas in the quartz-sericite-pyrite zone inclusions are less abundant and rarely contain halite inclusions. Metavolcanic rocks northwest of the mineralized porphyry are altered to amphibolitic hornfels near the contact. Biotitic alteration is strong outward from the hornfels and grades into chlorite alteration. The hornfels has very low sulfide content, and the biotite zone has moderate amounts of copper and sulfur, decreasing outward. The chlorite zone is characterized by an abrupt increase in zinc and manganese content. Fluid-inclusion data suggest temperatures between 300° and 400°C for hydrothermal fluids in the biotite-chlorite zone of the porphyry and 250° to 300°C for fluids in the quartz-sericite-pyrite zone. Pressures equivalent to about 1.5 km of burial are indicated.
","language":"English","publisher":"U. S. Geological Survey","usgsCitation":"Cox, D.P., Gonzalez, I.P., and Nash, J.T., 1975, Geology, geochemistry, and fluid-inclusion petrography of the Sapo Alegre porphyry copper prospect and its metavolcanic wallrocks, west-central Puerto Rico: Journal of Research of the U.S. Geological Survey, v. 3, no. 3, p. 313-327.","productDescription":"15 p.","startPage":"313","endPage":"327","costCenters":[],"links":[{"id":403179,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403178,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue3/report.pdf","size":"22359 KB","linkFileType":{"id":1,"text":"pdf"}}],"country":"Puerto Rico","county":"Río Víví district","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -66.79069519042969,\n 18.107513406005165\n ],\n [\n -66.65164947509766,\n 18.107513406005165\n ],\n [\n -66.65164947509766,\n 18.215981050868315\n ],\n [\n -66.79069519042969,\n 18.215981050868315\n ],\n [\n -66.79069519042969,\n 18.107513406005165\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Cox, Dennis P. dcox@usgs.gov","contributorId":2766,"corporation":false,"usgs":true,"family":"Cox","given":"Dennis","email":"dcox@usgs.gov","middleInitial":"P.","affiliations":[],"preferred":true,"id":846014,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gonzalez, Ileana Perez","contributorId":292878,"corporation":false,"usgs":false,"family":"Gonzalez","given":"Ileana","email":"","middleInitial":"Perez","affiliations":[],"preferred":false,"id":846015,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nash, J. Thomas","contributorId":26306,"corporation":false,"usgs":true,"family":"Nash","given":"J.","email":"","middleInitial":"Thomas","affiliations":[],"preferred":false,"id":846016,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70232541,"text":"70232541 - 1975 - Applications of remote sensing to structural interpretations in the southern Appalachians","interactions":[],"lastModifiedDate":"2022-07-06T16:42:01.466852","indexId":"70232541","displayToPublicDate":"1975-05-01T11:01:46","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"Applications of remote sensing to structural interpretations in the southern Appalachians","docAbstract":"Remote sensing is the technology of studying distant objects by measuring and recording energy from one or more segments of the electromagnetic spectrum. Imaging sensors which operate from medium- and high-altitude aircraft or from spacecraft can provide a synoptic view of large areas and of surface phenomena not evident in the field. Image-acquiring systems and instruments have been designed to partially automate data collection and to reduce the time devoted to analysis, information extraction, and detection of changes of surface phenomena. Among these phenomena are the surface distribution of heat, moisture, snow, water, vegetation, and cultural features. When coupled with ancillary data, including field surveys, sensor data provide useful information for the recognition and mapping of regional structure, jointing patterns, drainage patterns, fault and fracture traces, and rock types. The recognition of several major linear surface features, two of which proved to be traces of previously unrecognized faults (the Canebrake and the Coeburn faults) in the Appalachian Plateaus, demonstrates the pragmatic application of aircraft and spacecraft remote sensing to geological investigations in the Appalachians.
Disseminated uraninite occurs in Wheeler Basin, Grand County, Colo., about 5 mi (8 km) southeast of Monarch Lake, in Precambrian metamorphic rocks consisting of migmatized gneiss and mixed gneiss and pegmatite. An intrusion of Precambrian Y Silver Plume Granite lies within 400 ft (122 m) of the occurrence. The disseminated uraninite is confined to parts of the host rock that are rich in biotite; highest grade found was 0.73 percent uranium. The disseminated uraninite occurs as cubes and grains, generally from 0.1 to 0.3 mm across. Unit cell edge of the uraninite, ≈5.48 A, suggests its pegmatitic origin. The origin of the uraninite disseminations is attributed by us to remobilization and concentration of elements during metamorphism caused by the intrusion of Silver Plume Granite. Uranium and lead isotopic analyses by K. R. Ludwig of uraninite and monazite from biotite concentrations confirm an apparent age of 1,450±20 m.y. for these minerals. This age is equivalent to that reported for the Silver Plume Granite. Although the Wheeler Basin occurrence is small in size, it has many similarities to the Rossing uranium deposit in South-West Africa.
","language":"English","publisher":"U. S. Geological Survey","usgsCitation":"Young, E.J., and Hauff, P.L., 1975, An occurrence of disseminated uraninite in Wheeler Basin, Grand County, Colorado: Journal of Research of the U.S. Geological Survey, v. 3, no. 3, p. 305-311.","productDescription":"7 p.","startPage":"305","endPage":"311","costCenters":[],"links":[{"id":403176,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403165,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue3/report.pdf","size":"22359 KB","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Colorado","county":"Grand County","otherGeospatial":"Wheeler Basin","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -105.71044921875,\n 39.98514382939949\n ],\n [\n -105.56144714355469,\n 39.98514382939949\n ],\n [\n -105.56144714355469,\n 40.06506655864912\n ],\n [\n -105.71044921875,\n 40.06506655864912\n ],\n [\n -105.71044921875,\n 39.98514382939949\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Young, E. J.","contributorId":82316,"corporation":false,"usgs":true,"family":"Young","given":"E.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":846005,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hauff, P. L.","contributorId":95470,"corporation":false,"usgs":true,"family":"Hauff","given":"P.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":846006,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70176362,"text":"70176362 - 1975 - The study of fresh-water lake ice using multiplexed imaging radar","interactions":[],"lastModifiedDate":"2025-02-07T16:37:25.259929","indexId":"70176362","displayToPublicDate":"1975-04-04T00:00:00","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2328,"text":"Journal of Glaciology","active":true,"publicationSubtype":{"id":10}},"title":"The study of fresh-water lake ice using multiplexed imaging radar","docAbstract":"The study of ice in the upper Great Lakes, both from the operational and the scientific points of view, is receiving continued attention. Quantitative and qualitative field work is being conducted to provide the needed background for accurate interpretation of remotely sensed data. The data under discussion in this paper were obtained by a side-looking multiplexed airborne radar (SLAR) supplemented with ground-truth data.
Because of its ability to penetrate adverse weather, radar is an especially important instrument for monitoring ice in the upper Great Lakes. It has previously been shown that imaging radars can provide maps of ice cover in these areas. However, questions concerning both the nature of the surfaces reflecting radar energy and the interpretation of the radar imagery continually arise.
Our analysis of ice in Whitefish Bay (Lake Superior) indicates that the combination of the ice/water interlace and the ice/air interface is the major contributor to the radar backscatter as seen on the imagery At these frequencies the ice has a very low relative dielectric permittivity (< 3.0) and a low loss tangent Thus, this ice is somewhat transparent to the energy used by the imaging SLAR system. The ice types studied include newly formed black ice, pancake ice, and frozen and consolidated pack and brash ice.
Although ice thickness cannot be measured directly from the received signals, it is suspected that by combining the information pertaining to radar backscatter with data on the meteorological and sea-state history of the area, together with some basic ground truth, better estimates of the ice thickness may be provided. In addition, certain ice features (e.g. ridges, ice-foot formation, areas of brash ice) may be identified with reasonable confidence. There is a continued need for additional ground work to verify the validity of imaging radars for these types of interpretations.
Eyed eggs of chinook salmon (Oncorhynchus tshawytscha) were planted in the Abernathy (Washington) incubation channel at concentrations of 7,180, 10,764, and 14,349 eggs/m2 of gravel. Numbers of eggs planted were 200,000, 240,000, and 200,800, and survivals to the downstream migrant stage were 78.5, 85.0, and 79.1%, respectively; the differences were not statistically significant. The concentration of 14,349 eggs/m2 is near the capacity of the channel. This stocking rate is 10 times that commonly recommended for artificial spawning channels. Egg concentration was apparently limited only by the physical capacity of the gravel.
","language":"English","publisher":"American Fisheries Society","doi":"10.1577/1548-8659(1975)104<335:EOECIA>2.0.CO;2","usgsCitation":"Thomas, A., 1975, Effect of egg concentration in an incubation channel on survival of chinook salmon fry: Transactions of the American Fisheries Society, v. 104, no. 2, p. 335-337, https://doi.org/10.1577/1548-8659(1975)104<335:EOECIA>2.0.CO;2.","productDescription":"3 p.","startPage":"335","endPage":"337","costCenters":[{"id":365,"text":"Leetown Science Center","active":true,"usgs":true}],"links":[{"id":129575,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"104","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a4be4b07f02db6256ef","contributors":{"authors":[{"text":"Thomas, A.E.","contributorId":27002,"corporation":false,"usgs":true,"family":"Thomas","given":"A.E.","email":"","affiliations":[],"preferred":false,"id":320324,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":1013993,"text":"1013993 - 1975 - Structural proteins of two salmonid rhabdoviruses","interactions":[],"lastModifiedDate":"2025-02-26T22:46:45.76256","indexId":"1013993","displayToPublicDate":"1975-04-01T00:00:00","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2497,"text":"Journal of Virology","active":true,"publicationSubtype":{"id":10}},"title":"Structural proteins of two salmonid rhabdoviruses","docAbstract":"Purified infectious hematopoietic necrosis (IHN) virus and the virus of haemorrhagic septicaemia (VHS) (Egtved virus) each contain five structural proteins which were designated L, G, N, M-1, and M-2. The IHN viral polypeptides have molecular weights estimated to be 157,000, 72,000, 40,000, 25,000 and 20,000, respectively, whereas those of VHS viral polypeptides are estimated to be 157,000 74,000, 41,000, 21,500, and 19,000, respectively. The carbohydrate composition of the glycoprotein (G) was confirmed by demonstrating selective incorporation of [3H]glucosamine into the designated G protein of both viruses. Phosphoproteins were identified by incorporation of [32P]orthophosphate into the N and M-1 proteins of IHN virus and into the N protein of VHS virus. The glycoprotein of each virus was selectively solubilized by treatment with Triton X-100 in low salt buffer, whereas the M-1, and M-2 proteins along with the G protein were solubilized by Ttition X-100 in 0.43 M NaCl. The protein composition of the salmonid rhabdoviruses resembles that of the rabies virus group more closely than the vesicular stomatitis virus group.
","language":"English","publisher":"American Society for Microbiology","doi":"10.1128/jvi.15.4.733-738.1975","usgsCitation":"McAllister, P.E., and Wagner, R., 1975, Structural proteins of two salmonid rhabdoviruses: Journal of Virology, v. 15, no. 4, p. 733-738, https://doi.org/10.1128/jvi.15.4.733-738.1975.","productDescription":"6 p.","startPage":"733","endPage":"738","costCenters":[{"id":365,"text":"Leetown Science Center","active":true,"usgs":true}],"links":[{"id":486851,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1128/jvi.15.4.733-738.1975","text":"Publisher Index Page"},{"id":132067,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"15","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b15e4b07f02db6a48c8","contributors":{"authors":[{"text":"McAllister, P. E.","contributorId":71913,"corporation":false,"usgs":true,"family":"McAllister","given":"P.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":319583,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wagner, R.R.","contributorId":65804,"corporation":false,"usgs":true,"family":"Wagner","given":"R.R.","email":"","affiliations":[],"preferred":false,"id":319582,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":1001335,"text":"1001335 - 1975 - Fatal pox infection in a rough-legged hawk","interactions":[],"lastModifiedDate":"2025-04-07T16:37:26.434256","indexId":"1001335","displayToPublicDate":"1975-04-01T00:00:00","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2507,"text":"Journal of Wildlife Diseases","active":true,"publicationSubtype":{"id":10}},"title":"Fatal pox infection in a rough-legged hawk","docAbstract":"Natural pox infection occurred in a free-living rough-legged hawk (Buteo lagopus) in northeastern North Dakota. Gross, histological and electron microscopic findings were typical of pox infection, and characteristic lesions developed in red-tailed hawks (Buteo jamaicensis) but not in great horned owls (Bubo virginianus) following inoculation with case material. Death of the rough-legged hawk was attributed to starvation resulting from inability to capture prey and to blood loss from foot lesions.
","language":"English","publisher":"Wildlife Disease Association","doi":"10.7589/0090-3558-11.2.224","usgsCitation":"Pearson, G., Pass, D., and Beggs, E., 1975, Fatal pox infection in a rough-legged hawk: Journal of Wildlife Diseases, v. 11, no. 2, p. 224-228, https://doi.org/10.7589/0090-3558-11.2.224.","productDescription":"5 p.","startPage":"224","endPage":"228","costCenters":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":129333,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"11","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49fee4b07f02db5f74b0","contributors":{"authors":[{"text":"Pearson, G.L.","contributorId":83868,"corporation":false,"usgs":true,"family":"Pearson","given":"G.L.","email":"","affiliations":[],"preferred":false,"id":310892,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Pass, D.A.","contributorId":64179,"corporation":false,"usgs":true,"family":"Pass","given":"D.A.","affiliations":[],"preferred":false,"id":310890,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Beggs, E.C.","contributorId":76686,"corporation":false,"usgs":true,"family":"Beggs","given":"E.C.","email":"","affiliations":[],"preferred":false,"id":310891,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70208898,"text":"70208898 - 1975 - Fluid inclusion studies of vein, pipe, and replacement deposits, northwestern San Juan Mountains, Colorado","interactions":[],"lastModifiedDate":"2020-03-04T13:56:38","indexId":"70208898","displayToPublicDate":"1975-03-04T13:38:17","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1472,"text":"Economic Geology","active":true,"publicationSubtype":{"id":10}},"title":"Fluid inclusion studies of vein, pipe, and replacement deposits, northwestern San Juan Mountains, Colorado","docAbstract":"Base and precious metal ores valued in excess of $300 million have been mined from vein, pipe, and replacement deposits located on the northwest side of, and structurally related to, the middle Tertiary Silverton caldera. A belt of normal faults radial to the caldera contains veins which have been mined for as much as 15,000 feet (4,600 m) along strike and 3,700 feet (1,100 m) downdip. Structural relations, metal distributions, and fluid inclusion data suggest that many of the veins were open at the same general time and received the same mineralization.
Fluid inclusions in quartz and sphalerite of the main ore stage of the Argentine and adjoining veins have filling temperatures ranging from 315 degrees to 249 degrees C and salinities from 7.9 to 0.1 wt percent NaCl equivalent. However, the majority of inclusions from base metal and gold stages are in a relatively narrow range near 280 degrees to 290 degrees C and salinities are unusually low (less than 2 wt %). Filling temperatures in postsulfide quartz and fluorite are as low as 153 degrees C and salinities are generally less than 0.5 wt percent. A pressure correction of about +25 degrees C should be added to the filling temperatures. Ore fluids were physically homogeneous liquids over the 3,700-foot (1,100 m) vertical and 11,200-foot (3,400 m) lateral range studied and no systematic variations in filling temperatures or salinity in this space are noted, but significant fluctuations are evident locally.
Recently developed base metal replacement deposits occur in the Eocene Telluride Conglomerate adjacent to many metal-bearing veins. Calc-silicate alteration of the conglomerate host was probably by moderately saline fluids that ranged in temperature from 320 degrees to about 400 degrees C. Quartz-bearing clasts in altered zones contain secondary halitebearing inclusions with filling temperatures of about 250 degrees C and salinities about 34 wt percent; such inclusions are not known from the base metal stage and are interpreted to have been preore. Hydrothermal quartz, sphalerite, and calcite from replacement pods contain inclusions with filling temperatures ranging from 204 degrees to 309 degrees C and salinities from 11.2 to 0.2 wt percent. That the replacement zones and throughgoing veins are genetically related is suggested by the similarity of filling temperatures and compositions of base metal-stage fluid inclusions and by structural evidence.
Small high-grade pipe deposits of base and precious metals occur along the ring-fault zone of the Silverton caldera. Filling temperatures for inclusions in quartz, sphalerite, and barite of the main ore stage of these deposits range from 216 degrees to 308 degrees C and salinities range from 1.6 to 0.2 wt percent NaCl. Quartz in altered wall rocks and silicified capping contains moderately saline secondary inclusions with relatively uniform liquid: vapor ratios that suggest filling temperatures of about 225 degrees to 300 degrees C. From the available samples there is no fluid inclusion evidence for boiling. Throttling, which had been hypothesized to explain the telescoped nature of the pipe ores, is neither substantiated nor discredited by the inclusion data.
","language":"English","publisher":"GeoScienceWorld","doi":"10.2113/gsecongeo.70.8.1448","usgsCitation":"Nash, J.T., 1975, Fluid inclusion studies of vein, pipe, and replacement deposits, northwestern San Juan Mountains, Colorado: Economic Geology, v. 70, no. 8, p. 1448-1462, https://doi.org/10.2113/gsecongeo.70.8.1448.","productDescription":"15 p.","startPage":"1448","endPage":"1462","costCenters":[],"links":[{"id":372910,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Colorado","otherGeospatial":"Northwesterns San Juan Mountains ","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -108.39660644531249,\n 37.38325280195101\n ],\n [\n -107.545166015625,\n 37.38325280195101\n ],\n [\n -107.545166015625,\n 38.28131307922966\n ],\n [\n -108.39660644531249,\n 38.28131307922966\n ],\n [\n -108.39660644531249,\n 37.38325280195101\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"70","issue":"8","noUsgsAuthors":false,"publicationDate":"1975-12-01","publicationStatus":"PW","contributors":{"authors":[{"text":"Nash, J. Thomas","contributorId":26306,"corporation":false,"usgs":true,"family":"Nash","given":"J.","email":"","middleInitial":"Thomas","affiliations":[],"preferred":false,"id":783873,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70208897,"text":"70208897 - 1975 - Geochemical studies in the Park City district; II, Sulfide mineralogy and minor-element chemistry, Mayflower mine","interactions":[],"lastModifiedDate":"2020-03-04T13:31:22","indexId":"70208897","displayToPublicDate":"1975-03-04T13:16:25","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1472,"text":"Economic Geology","active":true,"publicationSubtype":{"id":10}},"title":"Geochemical studies in the Park City district; II, Sulfide mineralogy and minor-element chemistry, Mayflower mine","docAbstract":"Fissure-filling and replacement Pb-Zn-Cu-Au-Ag ores of the Mayflower mine occur in calcareous sedimentary and intrusive wall rocks over a vertical interval of 3,000 feet. The ores are exceptional in the district for their chalcopyrite and gold content and for the unusual associated gangue minerals anhydrite, chlorite, and hematite. High oxygen fugacities are indicated for many stages of mineralization. Sphalerite compositions are highly variable in the range 0.09 to 5.9 weight percent Fe, an indication of large fluctuations in sulfur fugacity. Silver is carried in tetrahedrite-tennantite (0.2 to 16 wt %), enargite (0.5 to 0.8 wt %), in coupled substitution with Bi + Sb in galena (0.02 to 2.9 wt %), and in the minerals argentite, matildite, chalcocite, and bornite. Content of As, Se, Te, and other minor elements is small. Fractionation of Cd between sphalerite and coexisting galena is relatively consistent whereas the fractionation of Mn between sphalerite and galena is variable; calculated temperatures of formation are high and unreliable.
","language":"English","publisher":"GeoScienceWorld","doi":"10.2113/gsecongeo.70.6.1038","usgsCitation":"Nash, J.T., 1975, Geochemical studies in the Park City district; II, Sulfide mineralogy and minor-element chemistry, Mayflower mine: Economic Geology, v. 70, no. 6, p. 1038-1049, https://doi.org/10.2113/gsecongeo.70.6.1038.","productDescription":"12 p.","startPage":"1038","endPage":"1049","costCenters":[],"links":[{"id":372907,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"70","issue":"6","noUsgsAuthors":false,"publicationDate":"1975-10-01","publicationStatus":"PW","contributors":{"authors":[{"text":"Nash, J. Thomas","contributorId":26306,"corporation":false,"usgs":true,"family":"Nash","given":"J.","email":"","middleInitial":"Thomas","affiliations":[],"preferred":false,"id":783872,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":25279,"text":"ofr100237 - 1975 - Index of flood maps for California prepared by the U.S. Geological Survey through 1974","interactions":[],"lastModifiedDate":"2014-07-08T16:17:47","indexId":"ofr100237","displayToPublicDate":"1975-03-01T16:15:27","publicationYear":"1975","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"1002-37","title":"Index of flood maps for California prepared by the U.S. Geological Survey through 1974","docAbstract":"No abstract available.","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr100237","issn":"0364-7064","usgsCitation":"Crippen, J.R., 1975, Index of flood maps for California prepared by the U.S. Geological Survey through 1974: U.S. Geological Survey Open-File Report 1002-37, 29 p., https://doi.org/10.3133/ofr100237.","productDescription":"29 p.","numberOfPages":"29","costCenters":[],"links":[{"id":289572,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"}],"country":"United States","state":"California","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -124.41,32.53 ], [ -124.41,42.01 ], [ -114.13,42.01 ], [ -114.13,32.53 ], [ -124.41,32.53 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53bd12ece4b00cbf31f7234f","contributors":{"authors":[{"text":"Crippen, John R.","contributorId":13208,"corporation":false,"usgs":true,"family":"Crippen","given":"John","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":193366,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70207457,"text":"70207457 - 1975 - Sources of suspended matter in waters of the Middle Atlantic Bight","interactions":[],"lastModifiedDate":"2019-12-19T15:25:01","indexId":"70207457","displayToPublicDate":"1975-03-01T15:18:32","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2451,"text":"Journal of Sedimentary Research","onlineIssn":"1938-3681","printIssn":"1527-1404","active":true,"publicationSubtype":{"id":10}},"title":"Sources of suspended matter in waters of the Middle Atlantic Bight","docAbstract":"Suspended matter collected in the Middle Atlantic Bight (the coastal segment of the United States between Cape Cod and Cape Hatteras) in September 1969 was predominantly organic: an average of 80% combustible organic matter in surface waters and 40)% near bottom. Total suspended concentrations decreased between the inner shelf and the shelf break by an order of magnitude in both near-surface and near-bottom waters. The noncombustible (ash) fraction of the suspended matter decreased over the same distance by one order of magnitude in the near-bottom waters and two orders of magnitude in surface waters. Recently contributed river sediment is not a significant constituent of the suspended matter in the waters of the shelf, particularly the outer shelf. Most of the inorganic material in suspension represents resuspended bottom sediments (at least some of which are relict) whose suspended concentrations are increased noticeably by storms.
","language":"English","publisher":"American Geological Institute","doi":"10.1306/212F6CFD-2B24-11D7-8648000102C1865D","usgsCitation":"Meade, R.H., Sachs, P.L., Manheim, F.T., Hathaway, J., and Spencer, D., 1975, Sources of suspended matter in waters of the Middle Atlantic Bight: Journal of Sedimentary Research, v. 78, no. 4, p. 171-188, https://doi.org/10.1306/212F6CFD-2B24-11D7-8648000102C1865D.","productDescription":"18 p.","startPage":"171","endPage":"188","costCenters":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":370515,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","otherGeospatial":"Mid-Atlantic Bight","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -70.0048828125,\n 41.60722821271717\n ],\n [\n -71.91650390625,\n 41.27780646738183\n ],\n [\n -73.54248046875,\n 40.56389453066509\n ],\n [\n -73.93798828125,\n 40.43022363450862\n ],\n [\n -74.86083984375,\n 38.90813299596705\n ],\n [\n -75.89355468749999,\n 37.10776507118514\n ],\n [\n -75.60791015625,\n 35.62158189955968\n ],\n [\n -76.2451171875,\n 34.95799531086792\n ],\n [\n -75.34423828125,\n 34.08906131584994\n ],\n [\n -72.88330078125,\n 33.925129700072\n ],\n [\n -69.67529296875,\n 38.87392853923629\n ],\n [\n -68.88427734374999,\n 41.47566020027821\n ],\n [\n -70.0048828125,\n 41.60722821271717\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"78","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Meade, Robert H. 0000-0002-4965-3040 rhmeade@usgs.gov","orcid":"https://orcid.org/0000-0002-4965-3040","contributorId":2744,"corporation":false,"usgs":true,"family":"Meade","given":"Robert","email":"rhmeade@usgs.gov","middleInitial":"H.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":778119,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sachs, Peter L.","contributorId":221422,"corporation":false,"usgs":false,"family":"Sachs","given":"Peter","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":778120,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Manheim, Frank T. 0000-0003-4005-4524","orcid":"https://orcid.org/0000-0003-4005-4524","contributorId":20770,"corporation":false,"usgs":true,"family":"Manheim","given":"Frank","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":778121,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hathaway, J.C.","contributorId":94280,"corporation":false,"usgs":true,"family":"Hathaway","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":778122,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Spencer, Derek","contributorId":221423,"corporation":false,"usgs":false,"family":"Spencer","given":"Derek","email":"","affiliations":[],"preferred":false,"id":778123,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":5221348,"text":"5221348 - 1975 - Cholinesterase (ChE) response and related mortality among birds fed ChE inhibitors","interactions":[],"lastModifiedDate":"2023-12-13T14:44:28.727361","indexId":"5221348","displayToPublicDate":"1975-03-01T12:17:51","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":887,"text":"Archives of Environmental Contamination and Toxicology","active":true,"publicationSubtype":{"id":10}},"title":"Cholinesterase (ChE) response and related mortality among birds fed ChE inhibitors","docAbstract":"Patterns of mortality and inhibition of brain and plasma ChE in birds treated with ChE inhibitors were studied in an attempt to determine the validity of using ChE activity as a monitoring and diagnostic technique. Analysis of brain ChE activity proved to be reliable for diagnosing and monitoring effects of selected ChE inhibitors in birds. Brain ChE inhibition exceeding 20% indicated exposure, and inhibition greater than 50% was sufficient for diagnosing cause of death. Individuals that died from dietary exposure to parathion or carbofuran had brain ChE activities below 55% of normal; although individuals could survive with brain ChE activity lower than 50%. Problems associated with collection, storage, and analysis of tissues for ChE activity are discussed.
","language":"English","publisher":"Springer","doi":"10.1007/BF02221128","usgsCitation":"Ludke, J.L., Hill, E.F., and Dieter, M.P., 1975, Cholinesterase (ChE) response and related mortality among birds fed ChE inhibitors: Archives of Environmental Contamination and Toxicology, v. 3, no. 1, p. 1-21, https://doi.org/10.1007/BF02221128.","productDescription":"21 p.","startPage":"1","endPage":"21","numberOfPages":"21","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":198359,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"3","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49dde4b07f02db5e25c7","contributors":{"authors":[{"text":"Ludke, J. Larry","contributorId":63467,"corporation":false,"usgs":true,"family":"Ludke","given":"J.","email":"","middleInitial":"Larry","affiliations":[],"preferred":false,"id":333611,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hill, Elwood F.","contributorId":27115,"corporation":false,"usgs":true,"family":"Hill","given":"Elwood","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":333610,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Dieter, Michael P.","contributorId":80547,"corporation":false,"usgs":true,"family":"Dieter","given":"Michael","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":333612,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70231540,"text":"70231540 - 1975 - Bishop ash: A widespread volcanic ash extended to southern California","interactions":[],"lastModifiedDate":"2022-05-12T15:34:28.170041","indexId":"70231540","displayToPublicDate":"1975-03-01T10:29:16","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2451,"text":"Journal of Sedimentary Research","onlineIssn":"1938-3681","printIssn":"1527-1404","active":true,"publicationSubtype":{"id":10}},"title":"Bishop ash: A widespread volcanic ash extended to southern California","docAbstract":"No abstract available.
","language":"English","publisher":"American Geological Institute","doi":"10.1306/212F6D07-2B24-11D7-8648000102C1865D","usgsCitation":"Merriam, R., and Bischoff, J.L., 1975, Bishop ash: A widespread volcanic ash extended to southern California: Journal of Sedimentary Research, v. 45, no. 1, p. 207-211, https://doi.org/10.1306/212F6D07-2B24-11D7-8648000102C1865D.","productDescription":"5 p.","startPage":"207","endPage":"211","costCenters":[],"links":[{"id":400583,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -117.0703125,\n 32.58384932565662\n ],\n [\n -114.47753906249999,\n 32.76880048488168\n ],\n [\n -114.47753906249999,\n 34.34343606848294\n ],\n [\n -116.8505859375,\n 36.73888412439431\n ],\n [\n -118.828125,\n 38.272688535980976\n ],\n [\n -121.025390625,\n 35.460669951495305\n ],\n [\n -119.70703125,\n 34.488447837809304\n ],\n [\n -117.46582031249999,\n 33.54139466898275\n ],\n [\n -117.0703125,\n 32.58384932565662\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"45","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Merriam, Richard","contributorId":291755,"corporation":false,"usgs":false,"family":"Merriam","given":"Richard","email":"","affiliations":[],"preferred":false,"id":842966,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bischoff, James L. jbischoff@usgs.gov","contributorId":1389,"corporation":false,"usgs":true,"family":"Bischoff","given":"James","email":"jbischoff@usgs.gov","middleInitial":"L.","affiliations":[],"preferred":true,"id":842967,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70232437,"text":"70232437 - 1975 - Geologic setting and chemical characteristics of hot springs in west-central Alaska","interactions":[],"lastModifiedDate":"2022-07-01T14:26:40.599507","indexId":"70232437","displayToPublicDate":"1975-03-01T09:17:06","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"Geologic setting and chemical characteristics of hot springs in west-central Alaska","docAbstract":"Numerous hot springs occur in a variety of geologic provinces in west-central Alaska. Granitic plutons are common to all the provinces, and the hot springs are spatially associated with the contacts of these plutons. Of 23 hot springs whose bedrock geology is known, all are within 4.8 km (3 mi) of a granitic pluton. The occurrence of hot springs, however, appears to be independent of the age, composition, or magmatic history of the pluton. Most of the analyzed hot springs appear to have chemical and isotopic compositions indicating that they were derived from deeply circulating meteoric water. About 25 percent of the analyzed hot springs show a distinct saline character with high concentrations of chloride, sodium, potassium, and calcium indicating either much more complex water-rock reactions than in the other hot springs or the addition of another type of water. Chemical geothermometers suggest subsurface temperatures in the general range of 70° to 160°C. If the hot spring waters have derived their heat solely from deep circulation, they must have reached depths of 2 to 5 km (6,000-15,000 ft), assuming geothermal gradients of 30° to 50°C/km. If a shallow igneous heat source exists in the area or if dilution or mixing has occurred, these depths may be shallower. The geologic and chemical data, although preliminary, suggest that most of the hot springs of west-central Alaska have relatively low subsurface temperatures and limited reservoir capacities in comparison with geothermal areas presently being utilized for electrical power generation. :The springs may, however, have some potential for limited power generation locally, if and when heat-exchange technology becomes available, as well as for space heating and agricultural uses.
","language":"English","publisher":"U.S. Geological Survey","usgsCitation":"Miller, T., Barnes, I., and Patton, W.W., 1975, Geologic setting and chemical characteristics of hot springs in west-central Alaska: Journal of Research of the U.S. Geological Survey, v. 3, no. 2, p. 149-162.","productDescription":"14 p.","startPage":"149","endPage":"162","costCenters":[],"links":[{"id":402828,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":402826,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue2/report.pdf"}],"country":"United States","state":"Alaska","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -165.05859375,\n 64.39693778132846\n ],\n [\n -149.94140625,\n 65.94647177615738\n ],\n [\n -152.75390624999997,\n 68.26938680456564\n ],\n [\n -167.34375,\n 66.16051056018838\n ],\n [\n -165.05859375,\n 64.39693778132846\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Miller, Thomas tmiller@usgs.gov","contributorId":146825,"corporation":false,"usgs":true,"family":"Miller","given":"Thomas","email":"tmiller@usgs.gov","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":845539,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Barnes, Ivan","contributorId":56619,"corporation":false,"usgs":true,"family":"Barnes","given":"Ivan","email":"","affiliations":[],"preferred":false,"id":845540,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Patton, William Wallace Jr.","contributorId":72346,"corporation":false,"usgs":true,"family":"Patton","given":"William","suffix":"Jr.","email":"","middleInitial":"Wallace","affiliations":[],"preferred":false,"id":845541,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ]}