{"pageNumber":"1522","pageRowStart":"38025","pageSize":"25","recordCount":41032,"records":[{"id":70207692,"text":"70207692 - 1983 - Wandering terranes in southern Alaska: The Aleutia Microplate and implications for the Bering Sea","interactions":[],"lastModifiedDate":"2020-06-15T14:48:59.025885","indexId":"70207692","displayToPublicDate":"1983-01-06T14:22:15","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2314,"text":"Journal of Geophysical Research B: Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Wandering terranes in southern Alaska: The Aleutia Microplate and implications for the Bering Sea","docAbstract":"<p><span>Paleomagnetic and geological data suggest that much of southern Alaska is a collage of tectonostratigraphic terranes which originated in Mesozoic time at paleolatitudes far south of their present position. The time of ‘docking’ of the terranes against cratonic Alaska is critical to defining their amalgamated size and extent during their northward motion as well as their role in the evolution of the Bering Sea. One of the largest of the tectonostratigraphic terranes, the Peninsular terrane of south central and southwestern Alaska, extends offshore along the outer Bering Sea continental margin (Beringia). Paleomagnetic data suggest that this terrane has moved northward through all of Cenozoic time, but geologic data imply that the terrane had accreted to Alaska by the end of the Mesozoic. In early Cenozoic time the eastern part of the Aleutian arc appears to have been superimposed on the Peninsular terrane, and postulated northward Cenozoic motion of the terrane would therefore have required northward motion of the arc. Two accretion models, based on docking times for terranes in Alaska, are proposed, and they illustrate that large areas of the abyssal Bering Sea, the Alaska Peninsula, the Aleutian arc, and the Beringian continental margin may be part of a superterrane or microplate called Aleutia (microplate as defined by Beck et al. (1980), i.e., a microplate is a displaced segment of lithosphere that has crustal roots, whereas a superterrane is an amalgamation of terranes which may or may not be rootless). Model A implies that the Aleutian arc developed in situ on the southern edge of Aleutia after the microplate had docked. In model B, the final docking time of the Peninsular terrane is late Cenozoic, which implies that the Aleutia microplate encompasses a mammoth area that includes parts of southern Alaska, the Alaska Peninsula, the southern Beringian margin, the abyssal Bering Sea (Kula plate), and the Aleutian arc. If model A is correct, the docking time of the Peninsular terrane is late Mesozoic or earliest Tertiary. The Aleutia microplate in this model is made up solely of the abyssal Bering Sea (Kula plate), which presumably docked at the same time or slightly after the Peninsular terrane accreted against Alaska. If model B is correct, that is, if the Aleutia collided with nuclear Alaska during the Cenozoic, then a late Cenozoic suture zone, the vestige of a large open sea that must have closed between Aleutia and Alaska, must exist in south central and southwest Alaska. Either evidence for Cenozoic closure and suturing has been obliterated in Alaska or the inferences of Cenozoic terrane motion derived from paleomagnetic data are suspect.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB088iB04p03439","usgsCitation":"Marlow, M.S., and Cooper, A.K., 1983, Wandering terranes in southern Alaska: The Aleutia Microplate and implications for the Bering Sea: Journal of Geophysical Research B: Solid Earth, v. 88, no. B4, p. 3439-3446, https://doi.org/10.1029/JB088iB04p03439.","productDescription":"8 p.","startPage":"3439","endPage":"3446","costCenters":[{"id":520,"text":"Pacific Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":371021,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Southern Alaska","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -167.51953124999997,\n              57.70414723434193\n            ],\n            [\n              -173.49609375,\n              57.088515327886505\n            ],\n            [\n              -169.1015625,\n              52.64306343665892\n            ],\n            [\n              -159.2578125,\n              53.4357192066942\n            ],\n            [\n              -155.830078125,\n              56.84897198026975\n            ],\n            [\n              -162.7734375,\n              58.07787626787517\n            ],\n            [\n              -167.51953124999997,\n              57.70414723434193\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"88","issue":"B4","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","contributors":{"authors":[{"text":"Marlow, Michael S.","contributorId":72775,"corporation":false,"usgs":true,"family":"Marlow","given":"Michael","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":778986,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cooper, Alan K. acooper@usgs.gov","contributorId":2854,"corporation":false,"usgs":true,"family":"Cooper","given":"Alan","email":"acooper@usgs.gov","middleInitial":"K.","affiliations":[{"id":520,"text":"Pacific Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":778987,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70169348,"text":"70169348 - 1983 - Possible relationships between trichinellosis and abnormal behavior in bears","interactions":[],"lastModifiedDate":"2016-03-25T12:02:41","indexId":"70169348","displayToPublicDate":"1983-01-01T13:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Possible relationships between trichinellosis and abnormal behavior in bears","docAbstract":"<p>Data compiled from parasite studies of grizzly bears (<i>Ursus arctos</i>) and black bears (<i>U. americanus</i>) in the Yellowstone and Glacier National Park populations and surrounding areas of Montana and Wyoming during 1969-79 are reviewed with reference to the possible influence of infection with the muscleworm <i>Trichinella</i> sp. on bear behavior. In grizzly bears, the high prevalence of this parasite (61% of 254 bears infected), the elevated larval concentrations in sensitive anatomical sites such as the tongue (average, 51 larvae per gram of tissue), and the chronic nature of bear infections as indicated by the tendency for highest infection rates to occur in older age classes (&gt; 16 yrs.), suggest a potential behavior-modifying effect might exist. However, retrospective analysis of recent human attacks by 4 grizzlies and 2 black bears in the northern Rocky Mountain region failed to demonstrate a consistent connection between erratic conduct and levels of<i> Trichinella</i> larvae (trichinae) in bear tissues. Clinical similarities of trichinellosis in bears and humans are hypothesized, and possible behavioral effects of ursine trichinellosis are discussed.</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"International Conference on Bear Research and Management","largerWorkSubtype":{"id":12,"text":"Conference publication"},"conferenceTitle":"International Conference on Bear Research and Management.","language":"English","publisher":"International Association for Bear Research and Management.","publisherLocation":"Morges, Switzerland","usgsCitation":"Worley, D., Greer, K.R., and Palmisciano, D.A., 1983, Possible relationships between trichinellosis and abnormal behavior in bears, chap. <i>of</i> International Conference on Bear Research and Management, v. 5, p. 280-283.","productDescription":"4 p.","startPage":"280","endPage":"283","numberOfPages":"4","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":481,"text":"Northern Rocky Mountain Science Center","active":true,"usgs":true}],"links":[{"id":319401,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":319400,"rank":1,"type":{"id":6,"text":"Chapter"},"url":"https://www.bearbiology.com/fileadmin/tpl/Downloads/URSUS/Vol_5/Worley_et_al_Vol_5.pdf"}],"volume":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56f661a9e4b07d796bf770dd","contributors":{"authors":[{"text":"Worley, David E.","contributorId":167866,"corporation":false,"usgs":false,"family":"Worley","given":"David E.","affiliations":[],"preferred":false,"id":623864,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Greer, Kenneth R.","contributorId":167860,"corporation":false,"usgs":false,"family":"Greer","given":"Kenneth","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":623865,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Palmisciano, Daniel A.","contributorId":30184,"corporation":false,"usgs":false,"family":"Palmisciano","given":"Daniel","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":623866,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70200535,"text":"70200535 - 1983 - Channels and valleys on Mars","interactions":[],"lastModifiedDate":"2018-10-23T11:12:50","indexId":"70200535","displayToPublicDate":"1983-01-01T11:12:08","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1723,"text":"GSA Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Channels and valleys on Mars","docAbstract":"<p><span>The discovery of channels, valleys, and related features of aqueous origin on Mars is of profound importance in comparative planetology. Models of the evolution of planetary surfaces and atmospheres must be reconciled with the diversity, abundance, and origins of channels and valleys on Mars. The term “channel” is properly restricted to those Martian troughs that display at least some evidence of large-scale fluid flow on their floors. Outflow channels show evidence of flows emanating from zones of chaotic terrain. The term “valley” applies to those elongate Martian troughs, or systems of troughs, that also appear to have formed by fluid flow, but which lack a suite of bed forms on their floors. The Martian valleys of greatest interest consist of interconnected, digitate networks that dissect extensive areas of heavily cratered uplands on the planet. The diversity of Martian channels and valleys is nearly as great as that of their terrestrial counterparts. Even though polygenetic and highly modified features abound, water was a necessary ingredient in the various channel- and valley-forming processes. The outflow channels involved large-scale fluid flow, entailing as yet unresolved percentages of liquid and solid phases, entrained sediment, and debris flowage. The formation of valley networks required ground water or ground ice, contributing to sapping and various other hillslope phenomena. Channels and valley networks probably require an ancient epoch with surface temperatures and pressures higher than at present. The aqueous formation of channels is release-limited, requiring short-duration floods of immense volumes. The origin of valley networks is perseverance-limited, requiring the maintenance of prolonged seepage and surface flow. Both phenomena are consistent with a thick, ice-rich Martian permafrost formed either during a volatile-rich early epoch or by very effective recycling of planetary water.</span></p>","language":"English","publisher":"The Geological Society of America","doi":"10.1130/0016-7606(1983)94<1035:CAVOM>2.0.CO;2","usgsCitation":"Mars Channel Working Group, 1983, Channels and valleys on Mars: GSA Bulletin, v. 94, no. 9, p. 1035-1054, https://doi.org/10.1130/0016-7606(1983)94<1035:CAVOM>2.0.CO;2.","productDescription":"20 p.","startPage":"1035","endPage":"1054","costCenters":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"links":[{"id":358669,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"94","issue":"9","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Mars Channel Working Group","contributorId":209982,"corporation":true,"usgs":false,"organization":"Mars Channel Working Group","id":749399,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70207140,"text":"70207140 - 1983 - Eolian sand bodies of the world","interactions":[],"lastModifiedDate":"2019-12-09T10:01:01","indexId":"70207140","displayToPublicDate":"1983-01-01T09:52:33","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1386,"text":"Developments in Sedimentology","active":true,"publicationSubtype":{"id":10}},"title":"Eolian sand bodies of the world","docAbstract":"<p><span>This chapter examines the eolian sand bodies of the world. Analyses regarding grain size and sorting distribution at Great Sand Dunes indicate that the higher dunes contain much more fine-grained sand and much less medium-grained sand than do the lower dunes, and, in addition, they are definitely better sorted. Cross-stratification in eolian deposits is the product of several distinct processes of transport. These processes are saltation or ripple migration that include various amounts of surface creep, grainfall (a dropping of grains from sand in suspension), and avalanching either by mass movement or by grain flowage which involves the downhill rolling or sliding of discrete particles. Penecontemporaneous deformational structures including various types of faults and folds, flames, break aparts, and rotated blocks are sufficiently numerous in most eolian deposits to serve as useful tools in determining genesis. These structures are good indicators of the nature of the stress and therefore provide information on the part of a sand body involved. Sufficient observations have been recorded to establish that the lee side (or slipface) of most modern dunes stands at 30° or slightly more and that the length of the foresets developed on it may be 8 or 10 m and often much more. © 1983, Elsevier Science &amp; Technology. All rights reserved.</span></p>","language":"English","publisher":"Elsevier ","doi":"10.1016/S0070-4571(08)70785-4","issn":"00704571","usgsCitation":"McKee, E., 1983, Eolian sand bodies of the world: Developments in Sedimentology, v. 38, no. C, p. 1-25, https://doi.org/10.1016/S0070-4571(08)70785-4.","productDescription":"25 p. ","startPage":"1","endPage":"25","costCenters":[],"links":[{"id":370096,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"38","issue":"C","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"McKee, E. D.","contributorId":105802,"corporation":false,"usgs":true,"family":"McKee","given":"E. D.","affiliations":[{"id":595,"text":"U.S. Geological Survey","active":false,"usgs":true}],"preferred":false,"id":776939,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70206168,"text":"70206168 - 1983 - A tale of two plutons: petrographic and mineralogic constraints on the petrogenesis of the Red Lake and Eagle Peak plutons, central Sierra Nevada, California","interactions":[],"lastModifiedDate":"2019-10-24T09:52:47","indexId":"70206168","displayToPublicDate":"1983-01-01T09:29:42","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2309,"text":"Journal of Geology","active":true,"publicationSubtype":{"id":10}},"title":"A tale of two plutons: petrographic and mineralogic constraints on the petrogenesis of the Red Lake and Eagle Peak plutons, central Sierra Nevada, California","docAbstract":"<p><span>The two plutons are similar in age (K/Ar, 87-89 m.y.) and range in composition from granodiorite to granite. The Red Lake pluton is equigranular, has a locally greisened marginal zone, and shows only minor mineralogical and chemical zoning, whereas the Eagle Peak pluton is mineralogically, compositionally and texturally zoned, with an equigranular margin and a porphyritic core. Modal and normative trends within each pluton are consistent with separation of plagioclase and mafic minerals leading to a residual liquid enriched in quartz and alkali feldspar. The presence of homogeneous cores in the plagioclase, early titanite crystallization in the Red Lake magma and irregular hornblende compositions suggest that refractory material was present when the magmas were intruded. Inferred source regions for the two plutons are amphibolite for the Red Lake magma and a more biotite-rich amphibolite for the Eagle Peak magma.</span></p>","language":"English ","doi":"10.1086/628784","issn":"00221376","usgsCitation":"Noyes, J., Wones, D.R., and Frey, F., 1983, A tale of two plutons: petrographic and mineralogic constraints on the petrogenesis of the Red Lake and Eagle Peak plutons, central Sierra Nevada, California: Journal of Geology, v. 91, no. 4, p. 353-379, https://doi.org/10.1086/628784.","productDescription":"26 p. 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 \"}}]}","volume":"91","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Noyes, J.H.","contributorId":66636,"corporation":false,"usgs":true,"family":"Noyes","given":"J.H.","email":"","affiliations":[],"preferred":false,"id":773755,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wones, D. R.","contributorId":104079,"corporation":false,"usgs":true,"family":"Wones","given":"D.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":773756,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Frey, F.A.","contributorId":12618,"corporation":false,"usgs":true,"family":"Frey","given":"F.A.","email":"","affiliations":[],"preferred":false,"id":773757,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"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":70011328,"text":"70011328 - 1983 - Thermal decarboxylation of acetic acid: Implications for origin of natural gas","interactions":[],"lastModifiedDate":"2024-03-19T15:46:16.412696","indexId":"70011328","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":"Thermal decarboxylation of acetic acid: Implications for origin of natural gas","docAbstract":"<p>Laboratory experiments on the thermal decarboxylation of solutions of acetic acid at 200°C and 300°C were carried out in hydrothermal equipment allowing for on-line sampling of both the gas and liquid phases for chemical and stable-carbon-isotope analyses. The solutions had ambient pH values between 2.5 and 7.1; pH values and the concentrations of the various acetate species at the conditions of the experiments were computed using a chemical model.</p><p>Results show that the concentrations of acetic acid, and not total acetate in solution, control the reaction rates which follow a first order equation based on decreasing concentrations of acetic acid with time. The decarboxylation rates at 200°C (1.81 × 10<sup>−8</sup><span>&nbsp;</span>per second) and 300°C (8.17 × 10<sup>−8</sup><span>&nbsp;</span>per second) and the extrapolated rates at lower temperatures are relatively high. The activation energy of decarboxylation is only 8.1 kcal/mole. These high decarboxylation rates, together with the distribution of short-chained aliphatic acid anions in formation waters, support the hypothesis that acid anions are precursors for an important portion of natural gas.</p><p>Results of the<span>&nbsp;</span><i>δ</i><sup>13</sup><i>C</i><span>&nbsp;</span>values of CO<sub>2</sub>, CH<sub>4</sub>, and total acetate show a reasonably constant fractionation factor of about 20 permil between CO<sub>2</sub><span>&nbsp;</span>and CH<sub>4</sub><span>&nbsp;</span>at 300°C. The<span>&nbsp;</span><i>δ</i><sup>13</sup><i>C</i><span>&nbsp;</span>values of CO<sub>2</sub><span>&nbsp;</span>and CH<sub>4</sub><span>&nbsp;</span>are initially low and become higher as decarboxylation increases.</p>","language":"English","publisher":"Elsevier","doi":"10.1016/0016-7037(83)90262-4","issn":"00167037","usgsCitation":"Kharaka, Y., Carothers, W., and Rosenbauer, R., 1983, Thermal decarboxylation of acetic acid: Implications for origin of natural gas: Geochimica et Cosmochimica Acta, v. 47, no. 3, p. 397-402, https://doi.org/10.1016/0016-7037(83)90262-4.","productDescription":"6 p.","startPage":"397","endPage":"402","numberOfPages":"6","costCenters":[],"links":[{"id":221747,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"47","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb21ce4b08c986b3255de","contributors":{"authors":[{"text":"Kharaka, Y.K.","contributorId":23568,"corporation":false,"usgs":true,"family":"Kharaka","given":"Y.K.","email":"","affiliations":[],"preferred":false,"id":360847,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Carothers, W.W.","contributorId":43803,"corporation":false,"usgs":true,"family":"Carothers","given":"W.W.","email":"","affiliations":[],"preferred":false,"id":360849,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Rosenbauer, R.J.","contributorId":37320,"corporation":false,"usgs":true,"family":"Rosenbauer","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":360848,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70184239,"text":"70184239 - 1983 - The fledging of common and thick-billed murres on Middleton Island, Alaska","interactions":[],"lastModifiedDate":"2017-03-03T15:15:52","indexId":"70184239","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2284,"text":"Journal of Field Ornithology","active":true,"publicationSubtype":{"id":10}},"title":"The fledging of common and thick-billed murres on Middleton Island, Alaska","docAbstract":"<p><span>Three species of alcids, Common and Thick-billed murres (<i>Uria aalge</i> and <i>U. lomvia</i>) and the Razorbill (<i>Alca torda</i>), have post-hatching developmental patterns intermediate to precocial and semi-precocial modes (Sealy 1973). The young leave their cliff nest sites at about one quarter of adult weight and complete their growth at sea. At departure, an event here loosely referred to as \"fledging,\" neither primary nor secondary flight feathers are grown, but well-developed wing coverts enable limited, descending flight.</span></p>","language":"English","publisher":"Wiley","usgsCitation":"Hatch, S.A., 1983, The fledging of common and thick-billed murres on Middleton Island, Alaska: Journal of Field Ornithology, v. 54, no. 3, p. 266-274.","productDescription":"9 p.","startPage":"266","endPage":"274","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":336826,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Middleton Island","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -146.41616821289062,\n              59.383059124988655\n            ],\n            [\n              -146.2496566772461,\n              59.383059124988655\n            ],\n            [\n              -146.2496566772461,\n              59.48763434062946\n            ],\n            [\n              -146.41616821289062,\n              59.48763434062946\n            ],\n            [\n              -146.41616821289062,\n              59.383059124988655\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"54","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"58ba8ec0e4b0bcef64f0b953","contributors":{"authors":[{"text":"Hatch, Scott A. 0000-0002-0064-8187 shatch@usgs.gov","orcid":"https://orcid.org/0000-0002-0064-8187","contributorId":2625,"corporation":false,"usgs":true,"family":"Hatch","given":"Scott","email":"shatch@usgs.gov","middleInitial":"A.","affiliations":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"preferred":true,"id":680694,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70011310,"text":"70011310 - 1983 - Land-use planning: One geologist's viewpoint","interactions":[],"lastModifiedDate":"2023-10-20T16:39:42.048953","indexId":"70011310","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1531,"text":"Environmental Conservation","active":true,"publicationSubtype":{"id":10}},"title":"Land-use planning: One geologist's viewpoint","docAbstract":"<div class=\"abstract-content\"><div class=\"abstract\" data-abstract-type=\"text-abstract\"><p>Planning for the best use of land and its resources should take fully into consideration the long-term consequences of each type of use in order to stretch out most beneficially the well-being of society in the future, and to protect the integrity of the land and its biota. Three kinds of land-use can be distinguished for planning purposes.<span>&nbsp;</span><span class=\"italic\">Reversible</span><span>&nbsp;</span>land-use leaves the land, after use, essentially as it was before; little or no man-induced modification remains. An example of reversible use in the United States is the designation of certain public lands as Wilderness.<span>&nbsp;</span><span class=\"italic\">Terminal</span><span>&nbsp;</span>land-use commits the land to a chosen particular use, and any attempt at reversal requires either time-scales that are long compared with the expected lifespan of the social and political institution, or a commitment of resources that is too high for society to consider worth bearing. Examples of terminal land-use are location of metropolises and sites of toxic and/or radioactive waste disposals; by its nature the list grows monotonically. A current source of some social tension arises from the fact that Wilderness designation appears to assign a terminal-use status by legislative fiat, whereas in fact the land is being used reversibly.</p></div></div>","language":"English","publisher":"Cambridge University Press","doi":"10.1017/S0376892900012182","usgsCitation":"Zen, E., 1983, Land-use planning: One geologist's viewpoint: Environmental Conservation, v. 10, no. 2, p. 97-104, https://doi.org/10.1017/S0376892900012182.","productDescription":"8 p.","startPage":"97","endPage":"104","numberOfPages":"8","costCenters":[],"links":[{"id":221439,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"10","issue":"2","noUsgsAuthors":false,"publicationDate":"2009-08-24","publicationStatus":"PW","scienceBaseUri":"505a43c0e4b0c8380cd665b7","contributors":{"authors":[{"text":"Zen, E-An","contributorId":47064,"corporation":false,"usgs":true,"family":"Zen","given":"E-An","email":"","affiliations":[],"preferred":false,"id":360796,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70011331,"text":"70011331 - 1983 - HIGH-TEMPERATURE GEOTHERMAL RESOURCES IN HYDROTHERMAL CONVECTION SYSTEMS IN THE UNITED STATES.","interactions":[],"lastModifiedDate":"2012-03-12T17:18:28","indexId":"70011331","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"HIGH-TEMPERATURE GEOTHERMAL RESOURCES IN HYDROTHERMAL CONVECTION SYSTEMS IN THE UNITED STATES.","docAbstract":"The calculation of high-temperature geothermal resources ( greater than 150 degree C) in the United States has been done by estimating the temperature, area, and thickness of each identified system. These data, along with a general model for recoverability of geothermal energy and a calculation that takes account of the conversion of thermal energy to electricity, yielded an estimate of 23,000 MW//e for 30 years. The undiscovered component was estimated based on multipliers of the identified resource as either 72,000 or 127,000 MW//e for 30 years depending on the model chosen for the distribution of undiscovered energy as a function of temperature.","largerWorkTitle":"Electric Power Research Institute, Advanced Power Systems Division, (Report) EPRI AP","conferenceTitle":"Proceedings - Seventh Annual Geothermal Conference and Workshop.","conferenceLocation":"San Diego, CA, USA","language":"English","publisher":"EPRI","publisherLocation":"Palo Alto, CA, USA","usgsCitation":"Nathenson, M., 1983, HIGH-TEMPERATURE GEOTHERMAL RESOURCES IN HYDROTHERMAL CONVECTION SYSTEMS IN THE UNITED STATES., <i>in</i> Electric Power Research Institute, Advanced Power Systems Division, (Report) EPRI AP, San Diego, CA, USA.","costCenters":[],"links":[{"id":220699,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a2e7ee4b0c8380cd5c5c6","contributors":{"authors":[{"text":"Nathenson, Manuel 0000-0002-5216-984X mnathnsn@usgs.gov","orcid":"https://orcid.org/0000-0002-5216-984X","contributorId":1358,"corporation":false,"usgs":true,"family":"Nathenson","given":"Manuel","email":"mnathnsn@usgs.gov","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":360855,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70010314,"text":"70010314 - 1983 - Sulphide mineralization and wall-rock alteration in ophiolites and modern oceanic spreading centres","interactions":[],"lastModifiedDate":"2025-03-07T16:55:04.92366","indexId":"70010314","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":"Sulphide mineralization and wall-rock alteration in ophiolites and modern oceanic spreading centres","docAbstract":"<p>No abstract available.</p>","language":"English","publisher":"Elsevier","doi":"10.1016/0375-6742(83)90041-9","issn":"03756742","usgsCitation":"Koski, R., 1983, Sulphide mineralization and wall-rock alteration in ophiolites and modern oceanic spreading centres: Journal of Geochemical Exploration, v. 19, no. 1-3, p. 496-498, https://doi.org/10.1016/0375-6742(83)90041-9.","productDescription":"3 p.","startPage":"496","endPage":"498","numberOfPages":"3","costCenters":[],"links":[{"id":219678,"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":"505b9de9e4b08c986b31db8e","contributors":{"authors":[{"text":"Koski, R.A.","contributorId":16006,"corporation":false,"usgs":true,"family":"Koski","given":"R.A.","email":"","affiliations":[],"preferred":false,"id":358615,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70011265,"text":"70011265 - 1983 - Noble gas systematics for coexisting glass and olivine crystals in basalts and dunite xenoliths from Loihi Seamount","interactions":[],"lastModifiedDate":"2023-12-10T22:04:49.183163","indexId":"70011265","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":"Noble gas systematics for coexisting glass and olivine crystals in basalts and dunite xenoliths from Loihi Seamount","docAbstract":"<p>Noble gas isotopes including<span>&nbsp;</span><sup>3</sup>He/<sup>4</sup>He,<span>&nbsp;</span><sup>40</sup>Ar/<sup>36</sup>Ar and Xe isotope ratios were determined for coexisting glass and olivine crystals in tholeiitic and alkalic basalts and dunite xenoliths from Loihi Seamount.</p><p>Glass and coexisting olivine crystals have similar<span>&nbsp;</span><sup>3</sup>He/<sup>4</sup>He ratios (2.8–3.4) × 10<sup>−5</sup>, 20 to 24 times the atmospheric ratio (<i>R</i><sub>A</sub>), but different<span>&nbsp;</span><sup>40</sup>Ar/<sup>36</sup>Ar ratios (400–1000). Based on the results of noble gas isotope ratios and microscopic observation, some olivine crystals are xenocrysts. We conclude that He is equilibrated between glass and olivine xenocrysts, but Ar is not.</p><p>The apparent high<span>&nbsp;</span><sup>3</sup>He/<sup>4</sup>He ratio (3 × 10<sup>−5</sup>; = 21<span>&nbsp;</span><i>R</i><sub>A</sub>) coupled with a relatively high<span>&nbsp;</span><sup>40</sup>Ar/<sup>36</sup>Ar ratio (4200) for dunite xenoliths (KK 17-5) may be explained by equilibration of He between MORB-type cumulates and the host magma.</p><p>Except for the dunite xenoliths, noble gas data for these Loihi samples are compatible with a model in which samples from hot spot areas may be explained by mixing between P (plume)-type and M (MORB)-type components with the addition of A (atmosphere)-type component.</p><p>Excess<span>&nbsp;</span><sup>129</sup>Xe has not been observed due to apparent large mass fractionation among Xe isotopes.</p>","language":"English","publisher":"Elsevier","doi":"10.1016/0012-821X(83)90156-5","issn":"0012821X","usgsCitation":"Kaneoka, I., Takaoka, N., and Clague, D., 1983, Noble gas systematics for coexisting glass and olivine crystals in basalts and dunite xenoliths from Loihi Seamount: Earth and Planetary Science Letters, v. 66, no. C, p. 427-437, https://doi.org/10.1016/0012-821X(83)90156-5.","productDescription":"11 p.","startPage":"427","endPage":"437","numberOfPages":"11","costCenters":[],"links":[{"id":220825,"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":"505a6722e4b0c8380cd731cc","contributors":{"authors":[{"text":"Kaneoka, I.","contributorId":77298,"corporation":false,"usgs":true,"family":"Kaneoka","given":"I.","email":"","affiliations":[],"preferred":false,"id":360701,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Takaoka, N.","contributorId":51017,"corporation":false,"usgs":true,"family":"Takaoka","given":"N.","email":"","affiliations":[],"preferred":false,"id":360700,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Clague, D.A.","contributorId":36129,"corporation":false,"usgs":true,"family":"Clague","given":"D.A.","email":"","affiliations":[],"preferred":false,"id":360699,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":26859,"text":"wri834094 - 1983 - Impact of changes in land use on the ground-water system in the Sequim-Dungeness Peninsula, Clallam County, Washington","interactions":[],"lastModifiedDate":"2023-03-14T20:43:18.101534","indexId":"wri834094","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":342,"text":"Water-Resources Investigations Report","code":"WRI","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"83-4094","title":"Impact of changes in land use on the ground-water system in the Sequim-Dungeness Peninsula, Clallam County, Washington","docAbstract":"<p>A digital-computer model was developed to simulate three-dimensional ground-water flow in aquifers underlying the Sequim-Dungeness peninsula, Clallam County, Washington. Analysis using the model shows that leakage from irrigation ditches is the area 's most important source of ground-water recharge. Termination of the irrigation system would lead to lower heads throughout the ground-water system. After 10-20 years of no irrigation, the water-table aquifer would have average drawdowns of about 20 feet and some areas would become completely unsaturated. Several hundred wells could be in danger of going dry. If irrigation were terminated, leakage from the Dungeness River would become the major source of ground-water recharge. As of June 1980, ground-water quality has apparently not been affected in the study area by the use of on-site domestic sewage-disposal systems. The median nitrate-plus-nitrite (as N) concentration in the water-table aquifer was 0.25 milligrams per liter, and the maximum concentration was 2.5 milligrams per liter.&nbsp;</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/wri834094","usgsCitation":"Drost, B., 1983, Impact of changes in land use on the ground-water system in the Sequim-Dungeness Peninsula, Clallam County, Washington: U.S. Geological Survey Water-Resources Investigations Report 83-4094, viii, 69 p., https://doi.org/10.3133/wri834094.","productDescription":"viii, 69 p.","costCenters":[],"links":[{"id":414134,"rank":3,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_35720.htm","linkFileType":{"id":5,"text":"html"}},{"id":55747,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/wri/1983/4094/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":123302,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/wri/1983/4094/report-thumb.jpg"}],"country":"United States","state":"Washington","county":"Clallam County","otherGeospatial":"Sequim-Dungeness Peninsula","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -123.267,\n              48.167\n            ],\n            [\n              -123.267,\n              48.043\n            ],\n            [\n              -123.033,\n              48.043\n            ],\n            [\n              -123.033,\n              48.167\n            ],\n            [\n              -123.267,\n              48.167\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ac9e4b07f02db67c4ac","contributors":{"authors":[{"text":"Drost, B. W.","contributorId":38526,"corporation":false,"usgs":true,"family":"Drost","given":"B. W.","affiliations":[],"preferred":false,"id":197136,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70011601,"text":"70011601 - 1983 - Statistical evaluation of oil and gas prospects in the outer continental shelf of the U.S. Gulf Coast","interactions":[],"lastModifiedDate":"2012-03-12T17:18:31","indexId":"70011601","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2554,"text":"Journal of the International Association for Mathematical Geology","active":true,"publicationSubtype":{"id":10}},"title":"Statistical evaluation of oil and gas prospects in the outer continental shelf of the U.S. Gulf Coast","docAbstract":"Areas of the U.S. Gulf Coast, both onshore and offshore, are among the petroliferous regions of the United States. In offshore Louisiana and Texas, most oil and gas is associated with structurally controlled traps on the crest or flanks of domes created by the diapiric movement of salt. These structures can be detected and mapped by seismic techniques that directly indicate favorable prospective areas. The characteristics of seismically defined structures provide information in advance of drilling about the probable size of reservoirs contained within these structures. Simple statistical relationships can be determined between the size, shape, and other attributes of structures detected by seismic mapping and the presence and size of petroleum and natural gas reservoirs. Gulf Coast OCS lease tracts presently are evaluated by the U.S. government using a Monte Carlo simulation procedure adapted from reservoir analysis. Specification of the parameters of the Monte Carlo model are obtained subjectively in advance of drilling and thus are highly uncertain. Comparisons of predrill predictions with postdiscovery reservoir evaluations show very low correlations. In contrast, predrill predictions based on regressions between seismic structural properties and reservoir volumes show highly significant correlations. In addition, statistical analysis of seismic structure is much simpler than the Monte Carlo procedure, and can be applied rapidly and inexpensively. A statistical analysis of the \"Pleistocene Trend\" of offshore Louisiana and Texas, an area of about 3 million acres, yielded results that are sufficiently encouraging to suggest that similar evaluations be made of the remaining Gulf Coast OCS and of OCS regions off of other coasts of the United States. ?? 1983 Plenum Publishing Corporation.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of the International Association for Mathematical Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Kluwer Academic Publishers-Plenum Publishers","doi":"10.1007/BF01030086","issn":"00205958","usgsCitation":"Davis, J., and Harbaugh, J., 1983, Statistical evaluation of oil and gas prospects in the outer continental shelf of the U.S. Gulf Coast: Journal of the International Association for Mathematical Geology, v. 15, no. 1, https://doi.org/10.1007/BF01030086.","startPage":"217","costCenters":[],"links":[{"id":205058,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF01030086"},{"id":220713,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"15","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b972be4b08c986b31b911","contributors":{"authors":[{"text":"Davis, J.C.","contributorId":72121,"corporation":false,"usgs":true,"family":"Davis","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":361518,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Harbaugh, J.W.","contributorId":43912,"corporation":false,"usgs":true,"family":"Harbaugh","given":"J.W.","email":"","affiliations":[],"preferred":false,"id":361517,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011181,"text":"70011181 - 1983 - Speculation on martian north polar wind circulation and the resultant orientations of polar sand dunes","interactions":[],"lastModifiedDate":"2024-02-16T12:16:53.413668","indexId":"70011181","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1963,"text":"Icarus","active":true,"publicationSubtype":{"id":10}},"title":"Speculation on martian north polar wind circulation and the resultant orientations of polar sand dunes","docAbstract":"<div id=\"preview-section-abstract\"><div id=\"abstracts\" class=\"Abstracts u-font-serif text-s\"><div id=\"aep-abstract-id4\" class=\"abstract author\"><div id=\"aep-abstract-sec-id5\"><p>Dunes in the Martian north polar erg show two dominant orientations. When seen at frost cap minimum, dunes north of 80°N record east winds, dunes south of 80°N record west winds. Many of the transverse dunes are considered to be reversing dunes. Dunes in two fields may have reversed at least once during the lifetime of the Viking Orbiters. Poor agreement exists among published predictive models of north polar winds and the interpretations derived from the major published map of the north polar dunes. We propose that the average polar winds are: (1) strong, off-pole northwest winds in fall; (2) moderate west winds in winter; (3) latitude-dependent weak to strong off-pole northeast winds in spring; and (4) weak west winds in summer. Viking images of near-polar clouds confirm much of the hypothesis. Images discussed in other studies can be given alternative interpretations that support this hypothesis also. Over millenia, the combination of reversing west and east winds could produce the binodal distributions of dune orientations observed at the north pole.</p></div></div></div></div>","language":"English","publisher":"Elsevier","doi":"10.1016/0019-1035(83)90112-4","issn":"00191035","usgsCitation":"Ward, A.W., and Doyle, K., 1983, Speculation on martian north polar wind circulation and the resultant orientations of polar sand dunes: Icarus, v. 55, no. 3, p. 420-431, https://doi.org/10.1016/0019-1035(83)90112-4.","productDescription":"12 p.","startPage":"420","endPage":"431","numberOfPages":"12","costCenters":[],"links":[{"id":221279,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"55","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b95b4e4b08c986b31b08a","contributors":{"authors":[{"text":"Ward, A. W.","contributorId":8129,"corporation":false,"usgs":true,"family":"Ward","given":"A.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":360470,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Doyle, K.B.","contributorId":103411,"corporation":false,"usgs":true,"family":"Doyle","given":"K.B.","email":"","affiliations":[],"preferred":false,"id":360471,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011179,"text":"70011179 - 1983 - Diatom evidence on Wisconsin and Holocene events in the Bering Sea","interactions":[],"lastModifiedDate":"2013-01-26T15:49:27","indexId":"70011179","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3218,"text":"Quaternary Research","active":true,"publicationSubtype":{"id":10}},"title":"Diatom evidence on Wisconsin and Holocene events in the Bering Sea","docAbstract":"Previous work on surface (modern) sediments has defined diatom species which appear to be good indicators of various oceanographic/ecologic conditions in the North Pacific Ocean and marginal seas. Three long cores from the eastern and northern sides of the Aleutian Basin show changes in species assemblage which can be interpreted in terms of changes in the ocean environment during the last glaciation (Wisconsin) and the Holocene. The early and late Wisconsin maxima were times of prolonged annual sea-ice cover and a short cool period of phytoplankton productivity during the ice-free season. The middle Wisconsin interstade, at least in the southern Bering Sea, had greater seasonal contrast than today, with some winter sea-ice cover, an intensified temperature minimum, and high spring productivity. Variations in clastic and reworked fossil material imply varying degrees of transport to the basin by Alaskan rivers. The results of Jouse?? from the central Bering Sea generally correspond with those presented here, although there are problems with direct comparison. ?? 1983.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Quaternary Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","publisherLocation":"Amsterdam, Netherlands","doi":"10.1016/0033-5894(83)90079-0","issn":"00335894","usgsCitation":"Sancetta, C., and Robinson, S., 1983, Diatom evidence on Wisconsin and Holocene events in the Bering Sea: Quaternary Research, v. 20, no. 2, p. 232-245, https://doi.org/10.1016/0033-5894(83)90079-0.","startPage":"232","endPage":"245","numberOfPages":"14","costCenters":[],"links":[{"id":266557,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/0033-5894(83)90079-0"},{"id":221277,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"20","issue":"2","noUsgsAuthors":false,"publicationDate":"2017-01-20","publicationStatus":"PW","scienceBaseUri":"505a00abe4b0c8380cd4f859","contributors":{"authors":[{"text":"Sancetta, C.","contributorId":14951,"corporation":false,"usgs":true,"family":"Sancetta","given":"C.","affiliations":[],"preferred":false,"id":360466,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Robinson, S.W.","contributorId":30985,"corporation":false,"usgs":true,"family":"Robinson","given":"S.W.","email":"","affiliations":[],"preferred":false,"id":360467,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011461,"text":"70011461 - 1983 - Authigenic vivianite in Potomac River sediments: control by ferric oxy-hydroxides","interactions":[],"lastModifiedDate":"2024-05-21T23:33:50.21923","indexId":"70011461","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2450,"text":"Journal of Sedimentary Petrology","active":true,"publicationSubtype":{"id":10}},"title":"Authigenic vivianite in Potomac River sediments: control by ferric oxy-hydroxides","docAbstract":"<div><div id=\"12458449\" class=\"article-section-wrapper js-article-section js-content-section  \" data-section-parent-id=\"0\"><p>Sand-size particles of vivianite (Fe<span>&nbsp;</span><sub>3</sub><span>&nbsp;</span>(PO<span>&nbsp;</span><sub>4</sub><span>&nbsp;</span>)<span>&nbsp;</span><sub>2</sub><span>&nbsp;</span>.8H<span>&nbsp;</span><sub>2</sub><span>&nbsp;</span>O) have been identified in surficial sediments of the tidal Potomac River near a major sewage treatment plant. Vivianite is concentrated in a surface layer of coarse-sand dredge spoil, which overlies much finer sediment. Although saturation indices indicate that the pore waters of virtually all the sediments in the study area are supersaturated with respect to vivianite, it is found only in association with dredge spoil. Pore-water profiles of Fe, P, and Eh, and the size and morphology of individual grains, indicate that the vivianite is authigenic. The major control on the occurrence of the mineral is the presence or absence of amorphous ferric oxy-hydroxides, which react with pore-water phosphorus to form stable ferric hydroxy-phosphates preferentially to the formation of vivianite.--Modified journal abstract.</p></div></div>","language":"English","publisher":"SEPM","doi":"10.1306/212F817F-2B24-11D7-8648000102C1865D","issn":"00224472","usgsCitation":"Hearn, P., Parkhurst, D., and Callender, E., 1983, Authigenic vivianite in Potomac River sediments: control by ferric oxy-hydroxides: Journal of Sedimentary Petrology, v. 53, no. 1, p. 165-177, https://doi.org/10.1306/212F817F-2B24-11D7-8648000102C1865D.","productDescription":"13 p.","startPage":"165","endPage":"177","numberOfPages":"13","costCenters":[],"links":[{"id":221666,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"53","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059eeeee4b0c8380cd4a042","contributors":{"authors":[{"text":"Hearn, P.P.","contributorId":18380,"corporation":false,"usgs":true,"family":"Hearn","given":"P.P.","affiliations":[],"preferred":false,"id":361171,"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":361170,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Callender, E.","contributorId":72528,"corporation":false,"usgs":true,"family":"Callender","given":"E.","email":"","affiliations":[],"preferred":false,"id":361172,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70011419,"text":"70011419 - 1983 - Tin granites of Seward Peninsula, Alaska","interactions":[],"lastModifiedDate":"2024-01-03T12:21:11.449223","indexId":"70011419","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1786,"text":"Geological Society of America Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Tin granites of Seward Peninsula, Alaska","docAbstract":"<div id=\"15238803\" class=\"article-section-wrapper js-article-section js-content-section  \" data-section-parent-id=\"0\"><p>Seven granite plutons, spatially and genetically related to tin metalization, are exposed in a 170-km-long belt across northwestern Seward Peninsula, Alaska. These plutons are cupolas and epizonal composite stocks that consist of several textural varieties of biotite granite, including medium- to coarse-grained seriate biotite granite, porphyritic biotite granite with an aplitic groundmass, and fine- to medium-grained equigranular biotite granite. The common accessory minerals are fluorite, allanite, apatite, and zircon. Other accessory minerals that are locally present include tourmaline, sphene, opaque oxide minerals, and late-forming (deuteric) muscovite and chlorite. The granites range in major-element contents as follows: SiO<sub>2</sub>, 72.5% to 76.6%; A1<sub>2</sub>O<sub>3</sub>, 12.7% to 14.3%; Na<sub>2</sub>O, 2.9% to 4.0%; K<sub>2</sub>O, 3.9% to 5.6%; and CaO, 0.6% to 1.2%. The sum of FeO + Fe<sub>2</sub>O<sub>3</sub><span>&nbsp;</span>+ MgO ranges from 0.3% to 2.4%; and the K<sub>2</sub>O to Na<sub>2</sub>O ratio from 1.1 to 1.8. The 0.1% to 0.9% F and 0.01% to 0.2% Cl reflect the over-all volatile-rich nature of the granites. The granites contain average or below-average concentrations of Co, Sc, Cr, and Zn, and generally above-average to distinctly high concentrations of Th, U, Hf, and Ta. The large cations emphasize the evolved nature of the granites; the Rb/Sr ratio is as high as 90 in some samples. Initial<span>&nbsp;</span><sup>87</sup>Sr/<sup>86</sup>Sr ratios range from 0.708 to as high as 0.720. The three Rb-Sr isochrons defined by the data agree with K-Ar age determinations and show that the stocks were emplaced during the Late Cretaceous, between about 70 and 80 m.y. ago.</p><p>The field, petrologic, and geochemical data indicate that the plutons had a multistage origin that involved large-scale melting of sialic crust, emplacement of magmas derived from batholithic fractionation at depth, and subsequent evolution of these magmas to generate small volumes of more highly evolved residual magmas. Although evolution of the granite complexes was largely governed by crystal-melt fractionation, some minor-element variations in the highly evolved granites cannot be explained by this process. For example, the distribution of rubidium and the light rare-earths appears to have been influenced by volatile depletion at the final stages of crystallization. The field data, petrologic data, and variation trends, such as distinct shifts toward higher albite contents in the residual granites, suggest that the coexistence of a volatile phase was important in their evolution. These results require that models seeking to explain compositional gradients in high-level granite (rhyolite) systems fully consider the role of a coexisting volatile phase.</p></div>","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1983)94<768:TGOSPA>2.0.CO;2","usgsCitation":"Hudson, T., and Arth, J.G., 1983, Tin granites of Seward Peninsula, Alaska: Geological Society of America Bulletin, v. 94, no. 6, p. 768-790, https://doi.org/10.1130/0016-7606(1983)94<768:TGOSPA>2.0.CO;2.","productDescription":"23 p.","startPage":"768","endPage":"790","numberOfPages":"23","costCenters":[],"links":[{"id":220976,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Seward Peninsula","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -168.29033380179976,\n              67.03116095038828\n            ],\n            [\n              -168.29033380179976,\n              64.05073366574283\n            ],\n            [\n              -159.85283380179993,\n              64.05073366574283\n            ],\n            [\n              -159.85283380179993,\n              67.03116095038828\n            ],\n            [\n              -168.29033380179976,\n              67.03116095038828\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"94","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb403e4b08c986b32611b","contributors":{"authors":[{"text":"Hudson, T.","contributorId":33446,"corporation":false,"usgs":true,"family":"Hudson","given":"T.","affiliations":[],"preferred":false,"id":361040,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Arth, Joseph G.","contributorId":104546,"corporation":false,"usgs":true,"family":"Arth","given":"Joseph","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":361041,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011417,"text":"70011417 - 1983 - Simulation of solute transport in a mountain pool-and-riffle stream: A transient storage model","interactions":[],"lastModifiedDate":"2018-02-07T13:43:16","indexId":"70011417","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":"Simulation of solute transport in a mountain pool-and-riffle stream: A transient storage model","docAbstract":"<p><span>The physical characteristics of mountain streams differ from the uniform and conceptually well- defined open channels for which the analysis of solute transport has been oriented in the past and is now well understood. These physical conditions significantly influence solute transport behavior, as demonstrated by a transient storage model simulation of solute transport in a very small (0.0125 m</span><sup>3</sup><span>s</span><sup>−1</sup><span>) mountain pool-and-riffle stream. The application is to a carefully controlled and intensively monitored chloride injection experiment. The data from the experiment are not explained by the standard convection-dispersion mechanisms alone. A transient storage model, which couples dead zones with the one-dimensional convection-dispersion equation, simulates the general characteristics of the solute transport behavior and a set of simulation parameters were determined that yield an adequate fit to the data. However, considerable uncertainty remains in determining physically realistic values of these parameters. The values of the simulation parameters used are compared to values used by other authors for other streams. The comparison supports, at least qualitatively, the determined parameter values.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/WR019i003p00718","usgsCitation":"Bencala, K.E., and Walters, R.A., 1983, Simulation of solute transport in a mountain pool-and-riffle stream: A transient storage model: Water Resources Research, v. 19, no. 3, p. 718-724, https://doi.org/10.1029/WR019i003p00718.","productDescription":"7 p.","startPage":"718","endPage":"724","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":220904,"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":"505b9084e4b08c986b319558","contributors":{"authors":[{"text":"Bencala, Kenneth E. kbencala@usgs.gov","contributorId":1541,"corporation":false,"usgs":true,"family":"Bencala","given":"Kenneth","email":"kbencala@usgs.gov","middleInitial":"E.","affiliations":[],"preferred":true,"id":361036,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Walters, Roy A.","contributorId":74877,"corporation":false,"usgs":true,"family":"Walters","given":"Roy","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":361035,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011965,"text":"70011965 - 1983 - Influence of time on metamorphism of sedimentary organic matter in liquid-dominated geothermal systems, western North America","interactions":[],"lastModifiedDate":"2024-01-31T01:28:02.451101","indexId":"70011965","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"title":"Influence of time on metamorphism of sedimentary organic matter in liquid-dominated geothermal systems, western North America","docAbstract":"<div id=\"15568224\" class=\"article-section-wrapper js-article-section js-content-section  \" data-section-parent-id=\"0\"><p>Temperature (<i>T</i><span>&nbsp;</span>in °C) and mean vitrinite reflectance (<i>R</i><sub>m</sub><span>&nbsp;</span>in %) of sedimentary organic matter samples from six liquid-dominated geothermal systems plot about a line approximated by a regression equation of the form<span>&nbsp;</span><i>R</i><sub>m</sub><span>&nbsp;</span>= 0.435 exp 0.00683<i>T</i>. The reflectance data from these systems are strongly temperature-dependent, with a coefficient of determination (<i>r</i><sup>2</sup>) of 0.8. Geologic evidence indicates that reaction duration ranges from 10<sup>3</sup><span>&nbsp;</span>or 10<sup>4</sup><span>&nbsp;</span>to 10<sup>6</sup><span>&nbsp;</span>yr in these systems that appear to have near-maximum temperatures. The uncertainty in vitrinite reflectance and temperature determinations must account for a large part of the remaining variability not explained by the regression equation; therefore, the strong temperature dependence of<span>&nbsp;</span><i>R</i><sub>m</sub><span>&nbsp;</span>indicates that after about 10<sup>4</sup><span>&nbsp;</span>yr, reaction duration has little or no influence on metamorphism of organic matter in liquid-dominated geothermal systems. These data indicate that vitrinite reflectance can be used to determine the maximum temperature reached in hot sedimentary basins of moderate longevity.</p></div>","language":"English","publisher":"Geological Society of America","doi":"10.1130/0091-7613(1983)11<384:IOTOMO>2.0.CO;2","issn":"00917613","usgsCitation":"Barker, C., 1983, Influence of time on metamorphism of sedimentary organic matter in liquid-dominated geothermal systems, western North America: Geology, v. 11, no. 7, p. 384-388, https://doi.org/10.1130/0091-7613(1983)11<384:IOTOMO>2.0.CO;2.","productDescription":"5 p.","startPage":"384","endPage":"388","numberOfPages":"5","costCenters":[],"links":[{"id":221483,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"11","issue":"7","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3b90e4b0c8380cd62653","contributors":{"authors":[{"text":"Barker, C.E.","contributorId":69991,"corporation":false,"usgs":true,"family":"Barker","given":"C.E.","affiliations":[],"preferred":false,"id":362402,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70011963,"text":"70011963 - 1983 - Liquefaction sites, Imperial Valley, California.","interactions":[],"lastModifiedDate":"2013-03-01T11:07:58","indexId":"70011963","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2326,"text":"Journal of Geotechnical Engineering","active":true,"publicationSubtype":{"id":10}},"title":"Liquefaction sites, Imperial Valley, California.","docAbstract":"Sands that did and did not liquefy at two sites during the 1979 Imperial Valley, Calif., earthquake (ML = 6.6) are identified and their properties evaluated. SPT tests were used to evaluate liquefaction susceptibility. Loose fine sands in an abandoned channel liquefied and produced sand boils, ground fissures, and a lateral spread at the Heber Road sites. Evidence of liquefaction was not observed over moderately dense over-bank sand east of the channel nor over dense point-bar sand to the west. -from ASCE Publications Information","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geotechnical Engineering","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"ASCE","doi":"10.1061/(ASCE)0733-9410(1983)109:3(440)","usgsCitation":"Youd, T., and Bennett, M., 1983, Liquefaction sites, Imperial Valley, California.: Journal of Geotechnical Engineering, v. 109, no. 3, p. 440-457, https://doi.org/10.1061/(ASCE)0733-9410(1983)109:3(440).","startPage":"440","endPage":"457","numberOfPages":"18","costCenters":[],"links":[{"id":221403,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":268626,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1061/(ASCE)0733-9410(1983)109:3(440)"}],"volume":"109","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a47f4e4b0c8380cd67aec","contributors":{"authors":[{"text":"Youd, T. L.","contributorId":73593,"corporation":false,"usgs":true,"family":"Youd","given":"T. L.","affiliations":[],"preferred":false,"id":362400,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bennett, M.J.","contributorId":67504,"corporation":false,"usgs":true,"family":"Bennett","given":"M.J.","email":"","affiliations":[],"preferred":false,"id":362399,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011962,"text":"70011962 - 1983 - Seasat synthetic aperture radar ( SAR) response to lowland vegetation types in eastern Maryland and Virginia","interactions":[],"lastModifiedDate":"2024-06-28T16:18:53.332913","indexId":"70011962","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":9107,"text":"Journal of Geophysical Research - Oceans","active":true,"publicationSubtype":{"id":10}},"title":"Seasat synthetic aperture radar ( SAR) response to lowland vegetation types in eastern Maryland and Virginia","docAbstract":"<p><span>Examination of SEASAT SAR images of eastern Maryland and Virginia reveals botanical distinctions between vegetated lowland areas and adjacent upland areas. Radar returns from the lowland areas can be either brighter or darker than returns from the upland forests. Scattering models and scatterometer measurements predict an increase of 6 dB in backscatter from vegetation over standing water. This agrees with the SCWigital number (DN) increase observed in the digital SEASAT data. The brightest areas in the Chickahominy, Virginia, drainage, containing P. virginica about 0.4 m high, contrast with the brightest areas in the Blackwater, Maryland, marshes, which contain mature loblolly pine in standing water. The darkest vegetated area in the Chickahominy drainage contains a forest of Nyssa aquatica (water tupelo) about 18 m high, while the darkest vegetated area in the Blackwater marshes contains the marsh plant Spartina alterniflora, 0.3 m high. The density, morphology, and relative geometry of the lowland vegetation with respect to standing water can all affect the strength of the return L band signal.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JC088iC03p01937","issn":"01480227","usgsCitation":"Krohn, M.D., Milton, N., and Segal, D.B., 1983, Seasat synthetic aperture radar ( SAR) response to lowland vegetation types in eastern Maryland and Virginia: Journal of Geophysical Research - Oceans, v. 88, no. C3, p. 1937-1952, https://doi.org/10.1029/JC088iC03p01937.","productDescription":"16 p.","startPage":"1937","endPage":"1952","numberOfPages":"16","costCenters":[],"links":[{"id":221402,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"88","issue":"C3","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"505b8855e4b08c986b316906","contributors":{"authors":[{"text":"Krohn, M. D.","contributorId":51250,"corporation":false,"usgs":true,"family":"Krohn","given":"M.","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":362397,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Milton, N.M.","contributorId":29415,"corporation":false,"usgs":true,"family":"Milton","given":"N.M.","email":"","affiliations":[],"preferred":false,"id":362396,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Segal, D. B.","contributorId":60236,"corporation":false,"usgs":true,"family":"Segal","given":"D.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":362398,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70012115,"text":"70012115 - 1983 - Comparison of rapid methods for chemical analysis of milligram samples of ultrafine clays","interactions":[],"lastModifiedDate":"2018-01-26T17:53:31","indexId":"70012115","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1245,"text":"Clays and Clay Minerals","onlineIssn":"1552-8367","printIssn":"0009-8604","active":true,"publicationSubtype":{"id":10}},"title":"Comparison of rapid methods for chemical analysis of milligram samples of ultrafine clays","docAbstract":"<p><span>Two rapid methods for the decomposition and chemical analysis of clays were adapted for use with 20–40-mg size samples, typical amounts of ultrafine products (≤0.5-µm diameter) obtained by modern separation methods for clay minerals. The results of these methods were compared with those of “classical” rock analyses. The two methods consisted of mixed lithium metaborate fusion and heated decomposition with HF in a closed vessel. The latter technique was modified to include subsequent evaporation with concentrated H</span><sub>2</sub><span>SO</span><sub>4</sub><span><span>&nbsp;</span>and re-solution in HCl, which reduced the interference of the fluoride ion in the determination of Al, Fe, Ca, Mg, Na, and K. Results from the two methods agree sufficiently well with those of the “classical” techniques to minimize error in the calculation of clay mineral structural formulae. Representative maximum variations, in atoms per unit formula of the smectite type based on 22 negative charges, are 0.09 for Si, 0.03 for Al, 0.015 for Fe, 0.07 for Mg, 0.03 for Na, and 0.01 for K.</span></p>","language":"English","publisher":"The Clay Minerals Society","doi":"10.1346/CCMN.1983.0310605","usgsCitation":"Rettig, S., Marinenko, J., Khoury, H.N., and Jones, B., 1983, Comparison of rapid methods for chemical analysis of milligram samples of ultrafine clays: Clays and Clay Minerals, v. 31, no. 6, p. 440-446, https://doi.org/10.1346/CCMN.1983.0310605.","productDescription":"7 p.","startPage":"440","endPage":"446","costCenters":[],"links":[{"id":222053,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"31","issue":"6","noUsgsAuthors":false,"publicationDate":"2024-04-02","publicationStatus":"PW","scienceBaseUri":"5059f887e4b0c8380cd4d176","contributors":{"authors":[{"text":"Rettig, S.L.","contributorId":42592,"corporation":false,"usgs":true,"family":"Rettig","given":"S.L.","email":"","affiliations":[],"preferred":false,"id":362767,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Marinenko, J.W.","contributorId":75558,"corporation":false,"usgs":true,"family":"Marinenko","given":"J.W.","email":"","affiliations":[],"preferred":false,"id":362769,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Khoury, Hani N.","contributorId":17765,"corporation":false,"usgs":false,"family":"Khoury","given":"Hani","email":"","middleInitial":"N.","affiliations":[],"preferred":false,"id":362766,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Jones, B.F.","contributorId":52156,"corporation":false,"usgs":true,"family":"Jones","given":"B.F.","email":"","affiliations":[],"preferred":false,"id":362768,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"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":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}]}}
]}