{"pageNumber":"4749","pageRowStart":"118700","pageSize":"25","recordCount":165605,"records":[{"id":70011644,"text":"70011644 - 1983 - Development of reaction models for ground-water systems","interactions":[],"lastModifiedDate":"2024-03-19T15:54:47.28244","indexId":"70011644","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":"Development of reaction models for ground-water systems","docAbstract":"<p><span>Methods are described for developing geochemical reaction models from the observed chemical compositions of ground water along a hydrologic flow path. The roles of thermodynamic speciation programs, mass balance calculations, and reaction-path simulations in developing and testing reaction models are contrasted. Electron transfer is included in the mass balance equations to properly account for redox reactions in ground water. The mass balance calculations determine net mass transfer models which must be checked against the thermodynamic calculations of speciation and reaction-path programs. Although reaction-path simulations of ground-water chemistry are thermodynamically valid, they must be checked against the net mass transfer defined by the mass balance calculations. An example is given testing multiple reaction hypotheses along a flow path in the Floridan aquifer where several reaction models are eliminated. Use of carbon and sulfur isotopic data with mass balance calculations indicates a net reaction of incongruent dissolution of dolomite (dolomite dissolution with calcite precipitation) driven irreversibly by gypsum dissolution, accompanied by minor sulfate reduction, ferric hydroxide dissolution, and pyrite precipitation in central Florida. Along the flow path, the aquifer appears to be open to CO</span><sub>2</sub><span>&nbsp;initially, and open to organic carbon at more distant points down gradient.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/0016-7037(83)90102-3","issn":"00167037","usgsCitation":"Plummer, N., Parkhurst, D., and Thorstenson, D., 1983, Development of reaction models for ground-water systems: Geochimica et Cosmochimica Acta, v. 47, no. 4, p. 665-685, https://doi.org/10.1016/0016-7037(83)90102-3.","productDescription":"21 p.","startPage":"665","endPage":"685","numberOfPages":"21","costCenters":[],"links":[{"id":221377,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"47","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0060e4b0c8380cd4f71d","contributors":{"authors":[{"text":"Plummer, Niel 0000-0002-4020-1013 nplummer@usgs.gov","orcid":"https://orcid.org/0000-0002-4020-1013","contributorId":190100,"corporation":false,"usgs":true,"family":"Plummer","given":"Niel","email":"nplummer@usgs.gov","affiliations":[{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":true,"id":361610,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Parkhurst, D.L.","contributorId":12474,"corporation":false,"usgs":true,"family":"Parkhurst","given":"D.L.","email":"","affiliations":[],"preferred":false,"id":361608,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Thorstenson, D.C.","contributorId":47377,"corporation":false,"usgs":true,"family":"Thorstenson","given":"D.C.","email":"","affiliations":[],"preferred":false,"id":361609,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70011643,"text":"70011643 - 1983 - River discharge controls phytoplankton dynamics in the northern San Francisco Bay estuary","interactions":[],"lastModifiedDate":"2023-10-12T16:40:50.009623","indexId":"70011643","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1587,"text":"Estuarine, Coastal and Shelf Science","active":true,"publicationSubtype":{"id":10}},"title":"River discharge controls phytoplankton dynamics in the northern San Francisco Bay estuary","docAbstract":"<p><span>Phytoplankton dynamics in the upper reach of the northern San Francisco Bay estuary are usually characterized by low biomass dominated by microflagellates or freshwater diatoms in winter, and high biomass dominated by neritic diatoms in summer. During two successive years of very low river discharge (the drought of 1976-77), the summer diatom bloom was absent. This is consistent with the hypothesis that formation of the diatom population maximum is a consequence of the same physical mechanisms that create local maxima of suspended sediments in partially-mixed estuaries: density-selective retention of particles within an estuarine circulation cell. Because the estuary is turbid, calculated phytoplankton growth rates are small in the central deep channel but are relatively large in lateral shallow embayments where light limination is less severe. When river discharge falls within a critical range (100–350 m</span><sup>3</sup><span>&nbsp;s</span><sup>−1</sup><span>) that positions the suspended particulate maximum adjacent to the productive shallow bays, the population of neritic diatoms increases. However, during periods of high discharge (winter) or during periods of very low discharge (drought), the suspended particulate maximum is less well-defined and is uncoupled (positioned downstream or upstream) from the shallow bays of the upper estuary, and the population of neritic diatoms declines. Hence, the biomass and community composition of phytoplankton in this estuary are controlled by river discharge.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/0272-7714(83)90103-8","issn":"02727714","usgsCitation":"Cloern, J., Alpine, A., Cole, B., Wong, R., Arthur, J., and Ball, M., 1983, River discharge controls phytoplankton dynamics in the northern San Francisco Bay estuary: Estuarine, Coastal and Shelf Science, v. 16, no. 4, p. 415-429, https://doi.org/10.1016/0272-7714(83)90103-8.","productDescription":"16 p.","startPage":"415","endPage":"429","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true},{"id":552,"text":"San Francisco Bay-Delta","active":false,"usgs":true},{"id":5079,"text":"Pacific Regional Director's Office","active":true,"usgs":true}],"links":[{"id":221306,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"San Francisco Bay Estuary","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -121.67860827479112,\n              38.17972343390355\n            ],\n            [\n              -121.72185933528598,\n              38.128405366754606\n            ],\n            [\n              -121.80574273204653,\n              38.07724899336887\n            ],\n            [\n              -121.85816985502179,\n              38.10365675536943\n            ],\n            [\n              -121.88333487404992,\n              38.19930489305705\n            ],\n            [\n              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E.","contributorId":59453,"corporation":false,"usgs":true,"family":"Cloern","given":"J. E.","affiliations":[],"preferred":false,"id":361605,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Alpine, A.E.","contributorId":6063,"corporation":false,"usgs":true,"family":"Alpine","given":"A.E.","affiliations":[],"preferred":false,"id":361602,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Cole, B.E.","contributorId":66268,"corporation":false,"usgs":true,"family":"Cole","given":"B.E.","email":"","affiliations":[],"preferred":false,"id":361606,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Wong, R.L.J.","contributorId":106642,"corporation":false,"usgs":true,"family":"Wong","given":"R.L.J.","email":"","affiliations":[],"preferred":false,"id":361607,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Arthur, J.F.","contributorId":38428,"corporation":false,"usgs":true,"family":"Arthur","given":"J.F.","email":"","affiliations":[],"preferred":false,"id":361603,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Ball, M.D.","contributorId":50410,"corporation":false,"usgs":true,"family":"Ball","given":"M.D.","email":"","affiliations":[],"preferred":false,"id":361604,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70012131,"text":"70012131 - 1983 - Nonlinear strain buildup and the earthquake cycle on the San Andreas fault","interactions":[],"lastModifiedDate":"2024-06-28T16:10:36.85437","indexId":"70012131","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":"Nonlinear strain buildup and the earthquake cycle on the San Andreas fault","docAbstract":"<p><span>Two contrasting models of the earthquake deformation cycle on strike slip faults predict significant temporal declines in shear strain rate near the fault, accompanied by a progressive broadening of the zone of deformation adjacent to it. In the thin lithosphere model, transient deformation results from flow in the asthenosphere due to stress relaxation following faulting through most or all of the lithosphere. For an earth model with a thick elastic lithosphere (plate thickness » depth of seismic slip), transient motions are due to postearthquake aseisrnic slip below the coseismic fault plane. Data from the San Andreas fault indicate a long-term temporal decrease in strain rate that persists for at least 30 years and may extend through the entire earthquake cycle. Observations support a cycle-long rate decrease and a temporal spreading of the deformation profile only if movement cycles on the northern and southern locked sections of the fault are basically similar. If so, the usually lower strain rates and broader deformation zone currently observed on the southern San Andreas represent a later evolutionary stage of the northern locked section, where a great earthquake is a more recent occurrence. Although the data allow some extreme models to be discarded, no sufficiently strong constraints exist to decide between the thin and thick lithosphere models. Regardless of the appropriate model the geodetic observations themselves indicate that strain buildup is sufficiently nonlinear to cause significant departures from recurrence estimates based on linear strain accumulation and the time-predictable model.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB088iB07p05893","issn":"01480227","usgsCitation":"Thatcher, W., 1983, Nonlinear strain buildup and the earthquake cycle on the San Andreas fault: Journal of Geophysical Research Solid Earth, v. 88, no. B7, p. 5893-5902, https://doi.org/10.1029/JB088iB07p05893.","productDescription":"10 p.","startPage":"5893","endPage":"5902","numberOfPages":"10","costCenters":[],"links":[{"id":222288,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"88","issue":"B7","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"505a6793e4b0c8380cd733d0","contributors":{"authors":[{"text":"Thatcher, W.","contributorId":32669,"corporation":false,"usgs":true,"family":"Thatcher","given":"W.","email":"","affiliations":[],"preferred":false,"id":362795,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70011629,"text":"70011629 - 1983 - Recent geologic development of Lake Michigan (U.S.A.)","interactions":[],"lastModifiedDate":"2012-03-12T17:18:27","indexId":"70011629","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1919,"text":"Hydrobiologia","onlineIssn":"1573-5117","printIssn":"0018-8158","active":true,"publicationSubtype":{"id":10}},"title":"Recent geologic development of Lake Michigan (U.S.A.)","docAbstract":"The stresses placed on Lake Michigan since the advent of industrialization require knowledge of the sedimentology of the whole lake in order to make informed decisions for environmental planning. Sediment accumulation rates are low: areas of the lake receiving the most sediment average only 1 mm a-1; deep-water basins average 0.1 to 0.5 mm a-1; and large areas are not receiving any sediment. Sediment was deposited rapidly (typically 5 mm a-1), in the form of rock flour, during the deglaciation of both Lake Michigan and Lake Superior Basins. Then the rate of accumulation decreased by 80-90% and has remained relatively constant since final deglaciation. Because active sedimentation occurs mostly in the deep water areas of the lake, the sediment remains undisturbed and contains a record of the chemical history of the lake. ?? 1983 Dr W. Junk Publishers.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrobiologia","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Kluwer Academic Publishers","doi":"10.1007/BF00028451","issn":"00188158","usgsCitation":"Gross, D., and Cahill, R., 1983, Recent geologic development of Lake Michigan (U.S.A.): Hydrobiologia, v. 103, no. 1, p. 193-198, https://doi.org/10.1007/BF00028451.","startPage":"193","endPage":"198","numberOfPages":"6","costCenters":[],"links":[{"id":221126,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":205088,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF00028451"}],"volume":"103","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a961ee4b0c8380cd81df2","contributors":{"authors":[{"text":"Gross, D.L.","contributorId":72929,"corporation":false,"usgs":true,"family":"Gross","given":"D.L.","email":"","affiliations":[],"preferred":false,"id":361576,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cahill, R.A.","contributorId":66393,"corporation":false,"usgs":true,"family":"Cahill","given":"R.A.","email":"","affiliations":[],"preferred":false,"id":361575,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011627,"text":"70011627 - 1983 - Distribution of quaternary radiolaria in the Navarin Basin geologic province, Bering Sea","interactions":[],"lastModifiedDate":"2023-09-25T15:58:24.297208","indexId":"70011627","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1369,"text":"Deep Sea Research Part A, Oceanographic Research Papers","active":true,"publicationSubtype":{"id":10}},"title":"Distribution of quaternary radiolaria in the Navarin Basin geologic province, Bering Sea","docAbstract":"<p><span>Radiolarians from the surface sediments of the Navarin Basin geologic province in the western part of the Bering Sea are more diverse and abundant than previous reports indicate. The shelf is dominated by two spongy radiolarian species groups (</span><i>Stylochlamydium venustum</i><span>&nbsp;and&nbsp;</span><i>Spongotrochus glacialis</i><span>&nbsp;groups), while the slope has more diversity. The distributions can in part be explained by present oceanographic conditions. Studies of five cores along the slope show that there is a faunal change within the top 5 m of sediment. The spongy radiolarians are more abundant in recent sediments but gradually decrease downcore as&nbsp;</span><i>Cycladophora davisiana</i><span>&nbsp;becomes the dominant species, which probably reflects an environmental change. The disappearance of&nbsp;</span><i>Lynchnocanoma grande</i><span>&nbsp;in the area occurred around 17,000 to 34,000 y BP, but more research is needed to confirm whether the extinction is a useful biostratigraphic marker.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/0198-0149(83)90021-3","usgsCitation":"Blueford, J.R., 1983, Distribution of quaternary radiolaria in the Navarin Basin geologic province, Bering Sea: Deep Sea Research Part A, Oceanographic Research Papers, v. 30, no. 7, p. 763-781, https://doi.org/10.1016/0198-0149(83)90021-3.","productDescription":"19 p.","startPage":"763","endPage":"781","numberOfPages":"19","costCenters":[],"links":[{"id":221124,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"otherGeospatial":"Bering Sea, Navarin Basin geologic province","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              175,\n              61\n            ],\n            [\n              175,\n              54\n            ],\n            [\n              179.999,\n              54\n            ],\n            [\n              179.999,\n              61\n            ],\n            [\n              175,\n              61\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    },\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -179.999,\n              61\n            ],\n            [\n              -179.999,\n              54\n            ],\n            [\n              -168,\n              54\n            ],\n            [\n              -168,\n              61\n            ],\n            [\n              -179.999,\n              61\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"30","issue":"7","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a02f2e4b0c8380cd50289","contributors":{"authors":[{"text":"Blueford, J. R.","contributorId":69563,"corporation":false,"usgs":true,"family":"Blueford","given":"J.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":361573,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70011178,"text":"70011178 - 1983 - Trends in Engineering Geologic and Related Mapping 1972–1983","interactions":[],"lastModifiedDate":"2023-11-03T00:56:01.385894","indexId":"70011178","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1115,"text":"Bulletin of the Association of Engineering Geologists","active":true,"publicationSubtype":{"id":10}},"title":"Trends in Engineering Geologic and Related Mapping 1972–1983","docAbstract":"Progress is reviewed that has been made during the period 1972-1982 in producing medium- and small-scale engineering geologic maps with a variety of content. Improved methods to obtain and present information are evolving. Standards concerning text and map content, soil and rock classification, and map symbols have been proposed. Application of geomorphological techniques in terrain evaluation has increased, as has the use of aerial photography and other remote sensing. Computers are being used to store, analyze, retrieve, and print both text and map information. Development of offshore resources, especially petroleum, has led to marked improvement and growth in marine engineering geology and geotechnology. Coordinated planning for societal needs has required broader scope and increased complexity of both engineering geologic and environmental geologic studies. Refs.","language":"English","publisher":"Association of Engineering Geologists","doi":"10.2113/gseegeosci.xxi.3.255","issn":"00045691","usgsCitation":"Varnes, D., and Keaton, J.R., 1983, Trends in Engineering Geologic and Related Mapping 1972–1983: Bulletin of the Association of Engineering Geologists, v. 21, no. 3, p. 255-267, https://doi.org/10.2113/gseegeosci.xxi.3.255.","productDescription":"13 p.","startPage":"255","endPage":"267","numberOfPages":"13","costCenters":[],"links":[{"id":221222,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"21","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505ba393e4b08c986b31fd7b","contributors":{"authors":[{"text":"Varnes, David J.","contributorId":86322,"corporation":false,"usgs":true,"family":"Varnes","given":"David J.","affiliations":[],"preferred":false,"id":360464,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Keaton, Jeffrey R.","contributorId":90174,"corporation":false,"usgs":true,"family":"Keaton","given":"Jeffrey","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":360465,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011180,"text":"70011180 - 1983 - Seismicity at Fuego, Pacaya, Izalco, and San Cristobal Volcanoes, Central America, 1973-1974","interactions":[],"lastModifiedDate":"2012-03-12T17:18:29","indexId":"70011180","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1093,"text":"Bulletin Volcanologique","active":true,"publicationSubtype":{"id":10}},"title":"Seismicity at Fuego, Pacaya, Izalco, and San Cristobal Volcanoes, Central America, 1973-1974","docAbstract":"Seismic data collected at four volcanoes in Central America during 1973 and 1974 indicate three sources of seismicity: regional earthquakes with hypocentral distances greater than 80 km, earthquakes within 40 km of each volcano, and seismic activity originating at the volcanoes due to eruptive processes. Regional earthquakes generated by the underthrusting and subduction of the Cocos Plate beneath the Caribbean Plate are the most prominent seismic feature in Central America. Earthquakes in the vicinity of the volcanoes occur on faults that appear to be related to volcano formation. Faulting near Fuego and Pacaya volcanoes in Guatemala is more complex due to motion on a major E-W striking transform plate boundary 40 km north of the volcanoes. Volcanic activity produces different kinds of seismic signatures. Shallow tectonic or A-type events originate on nearby faults and occur both singly and in swarms. There are typically from 0 to 6 A-type events per day with b value of about 1.3. At very shallow depths beneath Pacaya, Izalco, and San Cristobal large numbers of low-frequency or B-type events are recorded with predominant frequencies between 2.5 and 4.5 Hz and with b values of 1.7 to 2.9. The relative number of B-type events appears to be related to the eruptive states of the volcanoes; the more active volcanoes have higher levels of seismicity. At Fuego Volcano, however, low-frequency events have unusually long codas and appear to be similar to tremor. High-amplitude volcanic tremor is recorded at Fuego, Pacaya, and San Cristobal during eruptive periods. Large explosion earthquakes at Fuego are well recorded at five stations and yield information on near-surface seismic wave velocities (??=3.0??0.2 km/sec.). ?? 1983 Intern. Association of Volcanology and Chemistry of the Earth's Interior.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Bulletin Volcanologique","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Springer-Verlag","doi":"10.1007/BF02597563","issn":"0366483X","usgsCitation":"McNutt, S., and Harlow, D., 1983, Seismicity at Fuego, Pacaya, Izalco, and San Cristobal Volcanoes, Central America, 1973-1974: Bulletin Volcanologique, v. 46, no. 3, p. 283-297, https://doi.org/10.1007/BF02597563.","startPage":"283","endPage":"297","numberOfPages":"15","costCenters":[],"links":[{"id":221278,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":205105,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF02597563"}],"volume":"46","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8b93e4b08c986b317939","contributors":{"authors":[{"text":"McNutt, S.R.","contributorId":26722,"corporation":false,"usgs":true,"family":"McNutt","given":"S.R.","email":"","affiliations":[],"preferred":false,"id":360468,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Harlow, D.H.","contributorId":34533,"corporation":false,"usgs":true,"family":"Harlow","given":"D.H.","email":"","affiliations":[],"preferred":false,"id":360469,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011182,"text":"70011182 - 1983 - Vapor phase exsolution as a controlling factor in hydrogen isotope variation in granitic rocks: the Notch Peak granitic stock, Utah","interactions":[],"lastModifiedDate":"2023-12-10T22:06:47.005957","indexId":"70011182","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":"Vapor phase exsolution as a controlling factor in hydrogen isotope variation in granitic rocks: the Notch Peak granitic stock, Utah","docAbstract":"<div id=\"abstracts\" class=\"Abstracts u-font-serif text-s\"><div id=\"ab1\" class=\"abstract author\" lang=\"en\"><div id=\"aep-abstract-sec-id4\"><p>The Notch Peak granitic stock, western Utah, is comprised of three concentric sequentially intruded rock types, from granite at the rim, to quartz monzonite I, to quartz monzonite II at the core. The δ<sup>18</sup>O values of whole rocks vary about an average of 9.4 (SMOW), irrespective of the rock type and position relative to contact, suggesting that the three magmas had the same parent. The whole rock δD values in the stock range from −100 to −55. δD values increase toward the cores of both quartz monzonite I and quartz monzonite II, resulting in concentric contours. The δD contours of quartz monzonite II cross-cut those of quartz monzonite I, suggesting little isotopic interaction between these bodies and the absence of a late pervasive fluid phase. There is a positive correlation between δD values and water content of the samples, where samples from each body define a distinct field. The positive correlation is explained by isotopic fractionation attendant on vapor exsolution from the crystallizing magma. An observed increase in δD with the degree of chloritization, a trend opposite to that observed in systems where participation of meteoric water has been demonstrated, is the result of subsolidus interaction with the exsolved fluids. These results show that large variations in the hydrogen isotope ratios of a granitoid can arise by exsolution of a vapor phase from the melt on crystallization. In general, magmas with larger modal amount of primary hydrous phases will tend to have higher δD values than those with small amounts of hydrous phases. Furthermore, the relatively high δD values of chlorites at Notch Peak confirm the applicability of classical concepts of closed-system deuteric alteration to some granitoid bodies. Thus, meteoric water interaction need not be always invoked to explain hydrogen isotope variation and deuteric alteration in granitoids.</p></div></div></div><ul id=\"issue-navigation\" class=\"issue-navigation u-margin-s-bottom u-bg-grey1\"></ul>","language":"English","publisher":"Elsevier","doi":"10.1016/0012-821X(83)90132-2","issn":"0012821X","usgsCitation":"Nabelek, P., O’Neil, J.R., and Papike, J.J., 1983, Vapor phase exsolution as a controlling factor in hydrogen isotope variation in granitic rocks: the Notch Peak granitic stock, Utah: Earth and Planetary Science Letters, v. 66, no. C, p. 137-150, https://doi.org/10.1016/0012-821X(83)90132-2.","productDescription":"14 p.","startPage":"137","endPage":"150","numberOfPages":"14","costCenters":[],"links":[{"id":221352,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"66","issue":"C","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bc11ce4b08c986b32a44f","contributors":{"authors":[{"text":"Nabelek, P.I.","contributorId":71315,"corporation":false,"usgs":true,"family":"Nabelek","given":"P.I.","email":"","affiliations":[],"preferred":false,"id":360474,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"O’Neil, J. R.","contributorId":69633,"corporation":false,"usgs":true,"family":"O’Neil","given":"J.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":360473,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Papike, J. J.","contributorId":18488,"corporation":false,"usgs":true,"family":"Papike","given":"J.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":360472,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"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":70011187,"text":"70011187 - 1983 - Incorporation of prior information on parameters into nonlinear regression groundwater flow models: 2. Applications","interactions":[],"lastModifiedDate":"2018-02-07T13:41:01","indexId":"70011187","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Incorporation of prior information on parameters into nonlinear regression groundwater flow models: 2. Applications","docAbstract":"<p><span>This paper investigates factors influencing the degree of improvement in estimates of parameters of a nonlinear regression groundwater flow model by incorporating prior information of unknown reliability. Consideration of expected behavior of the regression solutions and results of a hypothetical modeling problem lead to several general conclusions. First, if the parameters are properly scaled, linearized expressions for the mean square error (MSE) in parameter estimates of a nonlinear model will often behave very nearly as if the model were linear. Second, by using prior information, the MSE in properly scaled parameters can be reduced greatly over the MSE of ordinary least squares estimates of parameters. Third, plots of estimated MSE and the estimated standard deviation of MSE versus an auxiliary parameter (the ridge parameter) specifying the degree of influence of the prior information on regression results can help determine the potential for improvement of parameter estimates. Fourth, proposed criteria can be used to make appropriate choices for the ridge parameter and another parameter expressing degree of overall bias in the prior information. Results of a case study of Truckee Meadows, Reno-Sparks area, Washoe County, Nevada, conform closely to the results of the hypothetical problem. In the Truckee Meadows case, incorporation of prior information did not greatly change the parameter estimates from those obtained by ordinary least squares. However, the analysis showed that both sets of estimates are more reliable than suggested by the standard errors from ordinary least squares.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/WR019i003p00662","usgsCitation":"Cooley, R.L., 1983, Incorporation of prior information on parameters into nonlinear regression groundwater flow models: 2. Applications: Water Resources Research, v. 19, no. 3, p. 662-676, https://doi.org/10.1029/WR019i003p00662.","productDescription":"15 p.","startPage":"662","endPage":"676","costCenters":[],"links":[{"id":221429,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"19","issue":"3","noUsgsAuthors":false,"publicationDate":"2010-07-09","publicationStatus":"PW","scienceBaseUri":"505a39efe4b0c8380cd61ab7","contributors":{"authors":[{"text":"Cooley, Richard L.","contributorId":8831,"corporation":false,"usgs":true,"family":"Cooley","given":"Richard","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":360487,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70011188,"text":"70011188 - 1983 - Use of multispectral scanner images for assessment of hydrothermal alteration in the Marysvale, Utah, mining area.","interactions":[{"subject":{"id":10713,"text":"ofr82675 - 1982 - Use of multispectral scanner images for assessment of hydrothermal alteration in the Marysvale, Utah, mining area","indexId":"ofr82675","publicationYear":"1982","noYear":false,"title":"Use of multispectral scanner images for assessment of hydrothermal alteration in the Marysvale, Utah, mining area"},"predicate":"SUPERSEDED_BY","object":{"id":70011188,"text":"70011188 - 1983 - Use of multispectral scanner images for assessment of hydrothermal alteration in the Marysvale, Utah, mining area.","indexId":"70011188","publicationYear":"1983","noYear":false,"title":"Use of multispectral scanner images for assessment of hydrothermal alteration in the Marysvale, Utah, mining area."},"id":1}],"lastModifiedDate":"2022-12-23T15:51:20.96093","indexId":"70011188","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","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":"Use of multispectral scanner images for assessment of hydrothermal alteration in the Marysvale, Utah, mining area.","docAbstract":"Airborne multispectral scanner. A color composite image was constructed using the following spectral band ratios: 1.6/2.2 mu m, 1.6/0.48 mu m, and 0.67/1.0 mu m. The color ratio composite successfully distinguished most types of altered rocks from unaltered rocks; further division of altered rocks into ferric oxide-rich and -poor types.","language":"English","publisher":"Society of Economic Geologists","doi":"10.2113/gsecongeo.78.4.675","usgsCitation":"Podwysocki, M.H., Segal, D.B., and Abrams, M.J., 1983, Use of multispectral scanner images for assessment of hydrothermal alteration in the Marysvale, Utah, mining area.: Economic Geology, v. 78, no. 4, p. 675-687, https://doi.org/10.2113/gsecongeo.78.4.675.","productDescription":"13 p.","startPage":"675","endPage":"687","costCenters":[],"links":[{"id":221430,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Utah","city":"Marysvale","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -112.08487601962403,\n              38.49195191766219\n            ],\n            [\n              -112.34456416632499,\n              38.49195191766219\n            ],\n            [\n              -112.34456416632499,\n              38.41010365522433\n            ],\n            [\n              -112.08487601962403,\n              38.41010365522433\n            ],\n            [\n              -112.08487601962403,\n              38.49195191766219\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"78","issue":"4","noUsgsAuthors":false,"publicationDate":"1983-07-01","publicationStatus":"PW","scienceBaseUri":"505bbf49e4b08c986b329a7a","contributors":{"authors":[{"text":"Podwysocki, M. H.","contributorId":70391,"corporation":false,"usgs":true,"family":"Podwysocki","given":"M.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":360490,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Segal, D. B.","contributorId":60236,"corporation":false,"usgs":true,"family":"Segal","given":"D.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":360489,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Abrams, M. J.","contributorId":29859,"corporation":false,"usgs":true,"family":"Abrams","given":"M.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":360488,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70011189,"text":"70011189 - 1983 - EFFICIENT TRANSFER OF DATA BETWEEN MAPS OF DIFFERENT PROJECTIONS.","interactions":[],"lastModifiedDate":"2012-03-12T17:18:27","indexId":"70011189","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"EFFICIENT TRANSFER OF DATA BETWEEN MAPS OF DIFFERENT PROJECTIONS.","docAbstract":"There are several ways to transfer data from an existing map to another map by computer. If the projection and parameters of both maps are known, analytic formulas may be used to convert rectangular coordinates of the first map to latitude and longitude and then to rectangular coordinates of the second map. This general solution, contained in a USGS computer program, involves inverse formulas for the first projection and forward formulas for the second projection.","largerWorkTitle":"Technical Papers of the American Congress of Surveying and Mapping","conferenceTitle":"Technical Papers of the 43rd Annual Meeting of the American Congress on Surveying and Mapping.","conferenceLocation":"Washington, DC, USA","language":"English","publisher":"American Congress on Surveying & Mapping","publisherLocation":"Falls Church, VA, USA","usgsCitation":"Snyder, J., 1983, EFFICIENT TRANSFER OF DATA BETWEEN MAPS OF DIFFERENT PROJECTIONS., <i>in</i> Technical Papers of the American Congress of Surveying and Mapping, Washington, DC, USA, p. 332-340.","startPage":"332","endPage":"340","numberOfPages":"9","costCenters":[],"links":[{"id":221431,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a045ce4b0c8380cd5092e","contributors":{"authors":[{"text":"Snyder, John P.","contributorId":16878,"corporation":false,"usgs":true,"family":"Snyder","given":"John P.","affiliations":[],"preferred":false,"id":360491,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70011190,"text":"70011190 - 1983 - A reexamination of the effects of adsorbates on the Raman spectrum of gibbsite","interactions":[],"lastModifiedDate":"2020-01-27T06:54:29","indexId":"70011190","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3419,"text":"Soil Science","active":true,"publicationSubtype":{"id":10}},"title":"A reexamination of the effects of adsorbates on the Raman spectrum of gibbsite","docAbstract":"Previous workers have attributed substantial changes in the Raman intensities of the OH stretching bands in solid, powdered gibbsite of surface area 10 m2/g to surface interactions with the adsorbates 093Ca2+,HxPO43x- and SiO2.xH2O. These changes apparently resulted from an unsatisfactory Raman measurement procedure as a re-examination using an internal intensity standard (Na2C2O4 crystals) with gibbsite of surface area 39 m2/g showed no significant changes in the low-frequency band-height ratios of gibbsite and adsorbates.-D.J.M.","language":"English","publisher":"Wolters Kluwer","doi":"10.1097/00010694-198308000-00006","issn":"0038075X","usgsCitation":"Cunningham, K., and Goldberg, M.C., 1983, A reexamination of the effects of adsorbates on the Raman spectrum of gibbsite: Soil Science, v. 136, no. 2, p. 102-110, https://doi.org/10.1097/00010694-198308000-00006.","productDescription":"9 p.","startPage":"102","endPage":"110","numberOfPages":"9","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":221507,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"136","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e540e4b0c8380cd46c30","contributors":{"authors":[{"text":"Cunningham, K.W.","contributorId":11476,"corporation":false,"usgs":true,"family":"Cunningham","given":"K.W.","email":"","affiliations":[],"preferred":false,"id":360492,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Goldberg, M. C.","contributorId":89220,"corporation":false,"usgs":true,"family":"Goldberg","given":"M.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":360493,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011191,"text":"70011191 - 1983 - SPONTANEOUS COAL COMBUSTION; MECHANISMS AND PREDICTION.","interactions":[],"lastModifiedDate":"2012-03-12T17:18:26","indexId":"70011191","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"SPONTANEOUS COAL COMBUSTION; MECHANISMS AND PREDICTION.","docAbstract":"Spontaneous ignition and combustion of coal is a major problem to the coal mining, shipping, and use industries; unintentional combustion causes loss of the resource as well as jeopardy to life and property. The hazard to life is especially acute in the case of underground coal mine fires that start by spontaneous ignition. It is the intention of this research to examine previously suggested causes of spontaneous ignition, to consider new evidence, and to suggest an experimental approach to determine which of these suggested causes is relevant to western U. S. coal. This discussion focuses only on causes and mechanism of spontaneous ignition.","conferenceTitle":"Proceedings - 1983 International Conference on Coal Science.","conferenceLocation":"Pittsburgh, PA, USA","language":"English","usgsCitation":"Herring, J.R., and Rich, F.J., 1983, SPONTANEOUS COAL COMBUSTION; MECHANISMS AND PREDICTION., Proceedings - 1983 International Conference on Coal Science., Pittsburgh, PA, USA, p. 753-756.","startPage":"753","endPage":"756","numberOfPages":"4","costCenters":[],"links":[{"id":221508,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aaf7ee4b0c8380cd87606","contributors":{"authors":[{"text":"Herring, James R.","contributorId":95492,"corporation":false,"usgs":true,"family":"Herring","given":"James","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":360495,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rich, Fredrick J.","contributorId":93194,"corporation":false,"usgs":true,"family":"Rich","given":"Fredrick","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":360494,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011193,"text":"70011193 - 1983 - The past is the key to the future","interactions":[],"lastModifiedDate":"2024-03-19T16:03:37.078914","indexId":"70011193","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":"The past is the key to the future","docAbstract":"<p><span>A new major frontier of geological research, which was initiated in the 1970's, involves predicting future geologic trends or events through study of the present and past, rather than trying to understand the past, often using what one knows about the present. Like most scientific frontiers, this one began from practical considerations—environmental concerns. The lack of formal recognition of this frontier results from fragmentation among many Federal agencies and highly focused mission-oriented programs (</span><i>e.g.</i><span>, earthquake prediction, CO</span><sub>2</sub><span>, nuclear-energy safety, etc.). Most programs aim to predict only the next 50–100 years, but much longer periods of the past need to be studied to do this. Nuclear-waste disposal has sometimes been considered in terms of the next million years, a period of time permitting significant and broad geologic changes. Decreasing public interest in environmental concerns relegates many questions from the realm of applied research back to that of basic research. Most of these questions are so fascinating, however, that the frontier is still worth pursuing. Such questions include whether a phenomenon will or will not take place and the rates at which it can develop (</span><i>e.g.</i><span>, how fast do rifts form, how fast can a caldera event begin, and how quickly can a glacial maximum arrive?). Common elements of all studies include the historic record, trends in the Quaternary, analogues in various periods of the geologic time scale, and allowance for phenomena never experienced before. Other examples of studies include the Cretaceous as a period of a climatic extreme, an especially interesting time period; establishing the amount of paleocloudiness, a particularly challenging and important research area; acid rain as a possible new phenomenon. Geochemistry has much to contribute to this frontier science.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/0016-7037(83)90293-4","issn":"00167037","usgsCitation":"Doe, B.R., 1983, The past is the key to the future: Geochimica et Cosmochimica Acta, v. 47, no. 8, p. 1341-1354, https://doi.org/10.1016/0016-7037(83)90293-4.","productDescription":"14 p.","startPage":"1341","endPage":"1354","numberOfPages":"14","costCenters":[],"links":[{"id":221510,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"47","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bae7fe4b08c986b32413a","contributors":{"authors":[{"text":"Doe, B. R.","contributorId":52173,"corporation":false,"usgs":true,"family":"Doe","given":"B.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":360502,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70011196,"text":"70011196 - 1983 - Quaternary geology of the Rhode Island inner shelf","interactions":[],"lastModifiedDate":"2017-09-14T15:01:12","indexId":"70011196","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2667,"text":"Marine Geology","active":true,"publicationSubtype":{"id":10}},"title":"Quaternary geology of the Rhode Island inner shelf","docAbstract":"Five sedimentary units and three erosional unconformities identified in high-resolution seismic-reflection profiles reveal the stratigraphic framework and Quaternary history of the inner continental shelf south of Narragansett Bay, Rhode Island. Late Tertiary to early Pleistocene rivers eroded the pre-Mesozoic bedrock and the Upper Cretaceous to lower Tertiary coastal plain and continental shelf strata to form a lowland and cuesta having a north-facing escarpment. The lowland and landward flanks of the cuesta were modified by glaciers during Pleistocene time and subsequently were overlain by drift and end moraine deposits of the late Wisconsinan ice advance. During deglaciation, freshwater lakes formed between the retreating ice and end moraines. Prior to sea-level rise, the drift and older deposits were cut by streams flowing south and southwestward toward Block Island Sound. As sea level rose, postglacial valleys were partly filled by fluvial, freshwater-peat, estuarine and salt-marsh deposits. Transgressing seas eroded the sea floor, exposing bedrock and coastal plain outcrops, and deposited marine sediments. ?? 1983.","language":"English","publisher":"Elsevier","doi":"10.1016/0025-3227(83)90033-6","issn":"00253227","usgsCitation":"Needell, S., O’Hara, C.J., and Knebel, H., 1983, Quaternary geology of the Rhode Island inner shelf: Marine Geology, v. 53, no. 1-2, p. 41-53, https://doi.org/10.1016/0025-3227(83)90033-6.","productDescription":"13 p.","startPage":"41","endPage":"53","costCenters":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":221574,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Rhode Island","otherGeospatial":"Narragansett Bay","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -71.51275634765625,\n              41.410805789669816\n            ],\n            [\n              -71.11450195312499,\n              41.410805789669816\n            ],\n            [\n              -71.11450195312499,\n              41.84808170729204\n            ],\n            [\n              -71.51275634765625,\n              41.84808170729204\n            ],\n            [\n              -71.51275634765625,\n              41.410805789669816\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"53","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a92c9e4b0c8380cd80a4b","contributors":{"authors":[{"text":"Needell, S. W.","contributorId":36938,"corporation":false,"usgs":true,"family":"Needell","given":"S. W.","affiliations":[],"preferred":false,"id":360513,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"O’Hara, C. J.","contributorId":32938,"corporation":false,"usgs":true,"family":"O’Hara","given":"C.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":360512,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Knebel, H.J.","contributorId":79092,"corporation":false,"usgs":true,"family":"Knebel","given":"H.J.","affiliations":[],"preferred":false,"id":360514,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70011197,"text":"70011197 - 1983 - Scoresum - A technique for displaying and evaluating multi-element geochemical information, with examples of its use in regional mineral assessment programs","interactions":[],"lastModifiedDate":"2025-03-07T16:52:51.250953","indexId":"70011197","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2302,"text":"Journal of Geochemical Exploration","active":true,"publicationSubtype":{"id":10}},"title":"Scoresum - A technique for displaying and evaluating multi-element geochemical information, with examples of its use in regional mineral assessment programs","docAbstract":"<div class=\"u-margin-s-bottom\">A technique called SCORESUM was developed to display a maximum of multi-element geochemical information on a minimum number of maps for mineral assessment purposes. The technique can be done manually for a small analytical data set or can be done with a computer for a large data set. SCORESUM can be used with highly censored data and can also weight samples so as to minimize the chemical differences of diverse lithologies in different parts of a given study area.</div><div class=\"u-margin-s-bottom\">The full range of reported analyses for each element of interest in a data set is divided into four categories. Anomaly scores — values of O (background), 1 (weakly anomalous), 2 (moderately anomalous), and 3 (strongly anomalous) — are substituted for all of the analyses falling into each of the four categories. A group of elements based on known or suspected association in altered or mineralized areas is selected for study and the anomaly scores for these elements are summed for each sample site and then plotted on a map. Some of the results of geochemical studies conducted for mineral assessments in two areas are briefly described. The first area, the Mokelumne Wilderness and vicinity, is a relatively small and geologically simple one. The second, the Walker Lake 1° × 2° quadrangle, is a large area that has extremely complex geology and that contains a number of different mineral deposit environments. These two studies provide examples of how the SCORESUM technique has been used (1) to enhance relatively small but anomalous areas and (2) to delineate and rank areas containing geochemical signatures for specific suites of elements related to certain types of alteration or mineralization.</div>","language":"English","publisher":"Elsevier","doi":"10.1016/0375-6742(83)90031-6","issn":"03756742","usgsCitation":"Chaffee, M., 1983, Scoresum - A technique for displaying and evaluating multi-element geochemical information, with examples of its use in regional mineral assessment programs: Journal of Geochemical Exploration, v. 19, no. 1-3, p. 361-381, https://doi.org/10.1016/0375-6742(83)90031-6.","productDescription":"21 p.","startPage":"361","endPage":"381","numberOfPages":"21","costCenters":[],"links":[{"id":221575,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"19","issue":"1-3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b879de4b08c986b316592","contributors":{"authors":[{"text":"Chaffee, M.A.","contributorId":108049,"corporation":false,"usgs":true,"family":"Chaffee","given":"M.A.","affiliations":[],"preferred":false,"id":360515,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70011198,"text":"70011198 - 1983 - Conjunctive use of groundwater and surface water for irrigated agriculture: Risk aversion","interactions":[],"lastModifiedDate":"2018-02-07T13:41:14","indexId":"70011198","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Conjunctive use of groundwater and surface water for irrigated agriculture: Risk aversion","docAbstract":"<p><span>In examining the South Platte system in Colorado where surface water and groundwater are used conjunctively for irrigation, we find the actual installed well capacity is approximately sufficient to irrigate the entire area. This would appear to be an overinvestment in well capacity. In this paper we examine to what extent groundwater is being developed as insurance against periods of low streamflow. Using a simulation model which couples the hydrology of a conjunctive stream aquifer system to a behavioral-economic model which incorporates farmer behavior in such a system, we have investigated the economics of an area patterned after a reach of the South Platte Valley in Colorado. The results suggest that under current economic conditions the most reasonable groundwater pumping capacity is a total capacity capable of irrigating the available acreage with groundwater. Installing sufficient well capacity to irrigate all available acreage has two benefits: (1) this capacity maximizes the expected net benefits and (2) this capacity also minimizes the variation in annual income: it reduces the variance to essentially zero. As pumping capacity is installed in a conjunctive use system, the value of flow forecasts is diminished. Poor forecasts are compensated for by pumping groundwater.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/WR019i005p01111","usgsCitation":"Bredehoeft, J.D., and Young, R.A., 1983, Conjunctive use of groundwater and surface water for irrigated agriculture: Risk aversion: Water Resources Research, v. 19, no. 5, p. 1111-1121, https://doi.org/10.1029/WR019i005p01111.","productDescription":"11 p.","startPage":"1111","endPage":"1121","costCenters":[],"links":[{"id":221576,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Colorado","otherGeospatial":"South Platte River","volume":"19","issue":"5","noUsgsAuthors":false,"publicationDate":"2010-07-09","publicationStatus":"PW","scienceBaseUri":"5059f9c7e4b0c8380cd4d794","contributors":{"authors":[{"text":"Bredehoeft, John D.","contributorId":86747,"corporation":false,"usgs":true,"family":"Bredehoeft","given":"John","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":360516,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Young, Richard A.","contributorId":38975,"corporation":false,"usgs":true,"family":"Young","given":"Richard","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":360517,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011199,"text":"70011199 - 1983 - Analysis of spurious oscillation modes for the shallow water and Navier-Stokes equations","interactions":[],"lastModifiedDate":"2023-09-21T16:06:38.028715","indexId":"70011199","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1314,"text":"Computers and Fluids","active":true,"publicationSubtype":{"id":10}},"title":"Analysis of spurious oscillation modes for the shallow water and Navier-Stokes equations","docAbstract":"<p><span>The origin and nature of spurious oscillation modes that appear in mixed finite element methods are examined. In particular, the shallow water equations are considered and a modal analysis for the one-dimensional problem is developed. From the resulting dispersion relations we find that the spurious modes in elevation are associated with zero frequency and large wave number (wavelengths of the order of the nodal spacing) and consequently are zero-velocity modes. The spurious modal behavior is the result of the finite spatial discretization. By means of an artificial compressibility and limiting argument we are able to resolve the similar problem for the Navier-Stokes equations. The relationship of this simpler analysis to alternative consistency arguments is explained. This modal approach provides an explanation of the phenomenon in question and permits us to deduce the cause of the very complex behavior of spurious modes observed in numerical experiments with the shallow water equations and Navier-Stokes equations. Furthermore, this analysis is not limited to finite element formulations, but is also applicable to finite difference formulations.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/0045-7930(83)90013-0","usgsCitation":"Walters, R.A., and Carey, G.F., 1983, Analysis of spurious oscillation modes for the shallow water and Navier-Stokes equations: Computers and Fluids, v. 11, no. 1, p. 51-68, https://doi.org/10.1016/0045-7930(83)90013-0.","productDescription":"18 p.","startPage":"51","endPage":"68","numberOfPages":"18","costCenters":[],"links":[{"id":221648,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"11","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059eb32e4b0c8380cd48c9b","contributors":{"authors":[{"text":"Walters, Roy A.","contributorId":74877,"corporation":false,"usgs":true,"family":"Walters","given":"Roy","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":360518,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Carey, G. F.","contributorId":86106,"corporation":false,"usgs":true,"family":"Carey","given":"G.","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":360519,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011200,"text":"70011200 - 1983 - 40Ar/39Ar and U-Th-Pb dating of separated clasts from the Abee E4 chondrite","interactions":[],"lastModifiedDate":"2023-12-10T22:05:45.297428","indexId":"70011200","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":"40Ar/39Ar and U-Th-Pb dating of separated clasts from the Abee E4 chondrite","docAbstract":"<div id=\"abstracts\" class=\"Abstracts u-font-serif text-s\"><div id=\"ab1\" class=\"abstract author\" lang=\"en\"><div id=\"aep-abstract-sec-id4\"><p>Determinations of<sup>40</sup>Ar/<sup>39</sup>Ar and U-Th-Pb are reported for three clasts from the Abee (E4) enstatite chondrite, which has been the object of extensive consortium investigations. The clasts give<sup>40</sup>Ar/<sup>39</sup>Ar plateau ages and/or maximum ages of 4.5 Gy, whereas two of the clasts give average ages of 4.4 Gy. Within the range of 4.4–4.5 Gy these data do not resolve any possible age differences among the three clasts.<sup>206</sup>Pb measured in these clasts is only ∼1.5–2.5% radiogenic, which leads to relatively large uncertainties in the Pb isochron age and in the<sup>207</sup>Pb/<sup>206</sup>Pb model ages. The Pb data indicate that the initial<sup>207</sup>Pb/<sup>206</sup>Pb was no more than 0.08±0.07% higher than this ratio in Can˜on Diablo troilite. The U-Th-Pb data are consistent with the interpretation that initial formation of these clasts occurred 4.58 Gy ago and that the clasts have since remained closed systems, but are contaminated with terrestrial Pb. The<sup>40</sup>Ar/<sup>39</sup>Ar ages could be gas retention ages after clast formation or impact degassing ages. The thermal history of Abee deduced from Ar data appears consistent with that deduced from magnetic data, and suggests that various Abee components experienced separate histories until brecciation no later than 4.4 Gy ago, and experienced no appreciable subsequent heating.</p></div></div></div><ul id=\"issue-navigation\" class=\"issue-navigation u-margin-s-bottom u-bg-grey1\"></ul>","language":"English","publisher":"Elsevier","doi":"10.1016/0012-821X(83)90077-8","issn":"0012821X","usgsCitation":"Bogard, D., Unruh, D., and Tatsumoto, M., 1983, 40Ar/39Ar and U-Th-Pb dating of separated clasts from the Abee E4 chondrite: Earth and Planetary Science Letters, v. 62, no. 1, p. 132-146, https://doi.org/10.1016/0012-821X(83)90077-8.","productDescription":"15 p.","startPage":"132","endPage":"146","numberOfPages":"15","costCenters":[],"links":[{"id":221649,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"62","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e264e4b0c8380cd45b3e","contributors":{"authors":[{"text":"Bogard, D.D.","contributorId":15762,"corporation":false,"usgs":true,"family":"Bogard","given":"D.D.","email":"","affiliations":[],"preferred":false,"id":360521,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Unruh, D.M.","contributorId":8498,"corporation":false,"usgs":true,"family":"Unruh","given":"D.M.","email":"","affiliations":[],"preferred":false,"id":360520,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Tatsumoto, M.","contributorId":76798,"corporation":false,"usgs":true,"family":"Tatsumoto","given":"M.","email":"","affiliations":[],"preferred":false,"id":360522,"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":70011202,"text":"70011202 - 1983 - Iron disulfide minerals and the genesis of roll-type uranium deposits","interactions":[],"lastModifiedDate":"2024-01-11T16:59:13.935738","indexId":"70011202","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","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":"Iron disulfide minerals and the genesis of roll-type uranium deposits","docAbstract":"<p><span>FeS&nbsp;</span><sub>2</sub><span>&nbsp;minerals in host rocks for deposits that contain fossil vegetal (organic) matter differ in abundance, distribution, texture, and sulfur isotopic ratios from FeS&nbsp;</span><sub>2</sub><span>&nbsp;minerals in host rocks for deposits that do not contain fossil vegetal matter. In three South Texas deposits lacking such organic matter, preore FeS&nbsp;</span><sub>2</sub><span>&nbsp;is dominantly euhedral pyrite which formed in response to solutions emanating from these faults. Ore-stage FeS&nbsp;</span><sub>2</sub><span>&nbsp;is dominantly marcasite that occurs as overgrowths on preore pyrite. In three deposits (two in Wyoming and one in Texas) that contain organic matter, preore FeS&nbsp;</span><sub>2</sub><span>&nbsp;is also dominantly pyrite, but it occurs commonly as framboids and as replacements of plant fragments and is formed by bacterial sulfate reduction during early diagenesis and may be isotopically distinct from pyrite formed from fault-related fluids. Ore-stage FeS&nbsp;</span><sub>2</sub><span>&nbsp;in these deposits is primarily pyrite. Bacterial sulfate reduction provided sulfide for ore-stage pyrite in deposits which contain organic matter. Abiologic sulfur transformations tend to produce ore-stage marcasite in deposits that do not contain organic matter.</span></p>","language":"English","publisher":"Society of Economic Geologists","doi":"10.2113/gsecongeo.78.1.105","issn":"03610128","usgsCitation":"Reynolds, R.L., and Goldhaber, M., 1983, Iron disulfide minerals and the genesis of roll-type uranium deposits: Economic Geology, v. 78, no. 1, p. 105-120, https://doi.org/10.2113/gsecongeo.78.1.105.","productDescription":"16 p.","startPage":"105","endPage":"120","numberOfPages":"16","costCenters":[],"links":[{"id":221651,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"78","issue":"1","noUsgsAuthors":false,"publicationDate":"1983-02-01","publicationStatus":"PW","scienceBaseUri":"505a3ee9e4b0c8380cd6412f","contributors":{"authors":[{"text":"Reynolds, R. L. 0000-0002-4572-2942","orcid":"https://orcid.org/0000-0002-4572-2942","contributorId":79885,"corporation":false,"usgs":true,"family":"Reynolds","given":"R.","middleInitial":"L.","affiliations":[{"id":318,"text":"Geosciences and Environmental Change Science Center","active":true,"usgs":true}],"preferred":true,"id":360525,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Goldhaber, M. B. 0000-0002-1785-4243","orcid":"https://orcid.org/0000-0002-1785-4243","contributorId":103280,"corporation":false,"usgs":true,"family":"Goldhaber","given":"M. B.","affiliations":[],"preferred":false,"id":360526,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70012132,"text":"70012132 - 1983 - Ground water: a review.","interactions":[],"lastModifiedDate":"2013-02-23T14:17:45","indexId":"70012132","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3284,"text":"Reviews of Geophysics and Space Physics","active":true,"publicationSubtype":{"id":10}},"title":"Ground water: a review.","docAbstract":"There is growing documentation that a significant portion of the Nation's fresh ground water in the densely populated areas of the USA is contaminated. Because of the slow rates of ground-water movement, ground water once contaminated will remain so for decades, often longer. Cleanup of contaminated ground water is almost always expensive and often technically unfeasible; the expense is often prohibitive. -from Author","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Reviews of Geophysics and Space Physics","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"American Geophysics Union","doi":"10.1029/RG021i003p00760","usgsCitation":"Bredehoeft, J., 1983, Ground water: a review.: Reviews of Geophysics and Space Physics, v. 21, no. 3, p. 760-765, https://doi.org/10.1029/RG021i003p00760.","startPage":"760","endPage":"765","numberOfPages":"6","costCenters":[],"links":[{"id":268042,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/RG021i003p00760"},{"id":222289,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"21","issue":"3","noUsgsAuthors":false,"publicationDate":"2010-06-14","publicationStatus":"PW","scienceBaseUri":"505a2b2de4b0c8380cd5b778","contributors":{"authors":[{"text":"Bredehoeft, J.D.","contributorId":12836,"corporation":false,"usgs":true,"family":"Bredehoeft","given":"J.D.","affiliations":[],"preferred":false,"id":362796,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70011206,"text":"70011206 - 1983 - Refractive index determination using the central focal masking technique with dispersion colors.","interactions":[],"lastModifiedDate":"2013-02-14T10:11:16","indexId":"70011206","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":"Refractive index determination using the central focal masking technique with dispersion colors.","docAbstract":"The procedures, precision, advantages and limitations of central focal masking (\"dispersion staining'), a technique for determining the refractive indices of microfragments by the immersion method and for distinguishing between minerals in an immersion mount, are described. -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":"Wilcox, R., 1983, Refractive index determination using the central focal masking technique with dispersion colors.: American Mineralogist, v. 68, no. 11-12, p. 1226-1236.","startPage":"1226","endPage":"1236","numberOfPages":"11","costCenters":[],"links":[{"id":221737,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":267376,"type":{"id":11,"text":"Document"},"url":"https://www.minsocam.org/ammin/AM68/AM68_1226.pdf"}],"volume":"68","issue":"11-12","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"50e4a44ee4b0e8fec6cdbb1e","contributors":{"authors":[{"text":"Wilcox, R.E.","contributorId":107348,"corporation":false,"usgs":true,"family":"Wilcox","given":"R.E.","email":"","affiliations":[],"preferred":false,"id":360554,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70011207,"text":"70011207 - 1983 - RECENT DEVELOPMENTS ON THE ORIGIN OF MINERAL MATTER IN COAL.","interactions":[],"lastModifiedDate":"2012-03-12T17:19:07","indexId":"70011207","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"RECENT DEVELOPMENTS ON THE ORIGIN OF MINERAL MATTER IN COAL.","docAbstract":"This study attempts to quantify some of the various origins of mineral matter. Data developed for the Upper Freeport coal bed indicates that mineral matter other than pyrite and calcite is primarily derived from the vegetal matter that ultimately became coal. Cathodoluminesence was used to verify that the quartz in the Upper Freeport coal is dominantly authigenic and not detrital in origin. Sulfur variability in coal beds of the central Appalachian Basin was investigated stratagraphically.","conferenceTitle":"Proceedings - 1983 International Conference on Coal Science.","conferenceLocation":"Pittsburgh, PA, USA","language":"English","usgsCitation":"Cecil, C.B., Stanton, R., Dulong, F., and Ruppert, L., 1983, RECENT DEVELOPMENTS ON THE ORIGIN OF MINERAL MATTER IN COAL., Proceedings - 1983 International Conference on Coal Science., Pittsburgh, PA, USA.","startPage":"381","costCenters":[],"links":[{"id":221738,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a9332e4b0c8380cd80c7b","contributors":{"authors":[{"text":"Cecil, C. B. 0000-0002-9032-1689","orcid":"https://orcid.org/0000-0002-9032-1689","contributorId":62204,"corporation":false,"usgs":true,"family":"Cecil","given":"C.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":360556,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Stanton, R.W.","contributorId":19164,"corporation":false,"usgs":true,"family":"Stanton","given":"R.W.","email":"","affiliations":[],"preferred":false,"id":360555,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Dulong, F.T.","contributorId":81490,"corporation":false,"usgs":true,"family":"Dulong","given":"F.T.","affiliations":[],"preferred":false,"id":360557,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Ruppert, L.P.","contributorId":104628,"corporation":false,"usgs":true,"family":"Ruppert","given":"L.P.","email":"","affiliations":[],"preferred":false,"id":360558,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
]}