The enigma that caves and other solution openings form in carbonate rocks at great depths below land surface rather than forming from the surface downward can be explained by the generation of CO2 within the aquifer system. In the proposed model, CO2 is generated by the oxidation of particulate and/or dissolved organic carbon that is transported from the land surface deep into the unsaturated zone by recharging ground water. The organic material is oxidized to CO2 by aerobic bacteria utilizing oxygen that diffuses in from the atmosphere. Because gas transport in the unsaturated zone is controlled largely by diffusion, steady-state generation of even minute amounts of CO2 deep in the unsaturated zone results in the creation of large concentrations of CO2 at depth as it establishes a concentration gradient to the surface or other sink.
","language":"English","publisher":"GSW","doi":"10.1130/0091-7613(1985)13<822:OOCAOS>2.0.CO;2","issn":"00917613","usgsCitation":"Wood, W., 1985, Origin of caves and other solution openings in the unsaturated (vadose) zone of carbonate rocks: A model for CO2 generation: Geology, v. 13, no. 11, p. 822-824, https://doi.org/10.1130/0091-7613(1985)13<822:OOCAOS>2.0.CO;2.","productDescription":"3 p.","startPage":"822","endPage":"824","numberOfPages":"3","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":220513,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"13","issue":"11","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a70c7e4b0c8380cd76240","contributors":{"authors":[{"text":"Wood, W.W.","contributorId":21974,"corporation":false,"usgs":true,"family":"Wood","given":"W.W.","email":"","affiliations":[],"preferred":false,"id":365229,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70013069,"text":"70013069 - 1985 - Assessment of long-term salinity changes in an irrigated stream-aquifer system","interactions":[],"lastModifiedDate":"2020-01-19T11:09:19","indexId":"70013069","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","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":"Assessment of long-term salinity changes in an irrigated stream-aquifer system","docAbstract":"Changes in salinity in groundwater and surface water in the Arkansas River valley of southeastern Colorado are primarily related to irrigation practices. A solute transport model was applied to an 11-mile reach of the valley to compute salinity changes in response to spatially and temporally varying stresses. The model was calibrated in 1973 using detailed field measurements made during 1971 and 1972. In 1973 the calibrated model was used to predict that a gradual long-term increase in groundwater salinity of about 2–3% per year would occur if the observed irrigation practices continued. The study area was resampled during the winter of 1982 to help evaluate if any long-term changes in salinity are actually occurring. Nonparametric and parametric statistical tests were used to help assess the significance of observed changes in groundwater salinity. These tests indicate that a statistically significant increase in salinity occurred between the winters of 1971 and 1972 (the model calibration period). However, a comparison of the winter 1972 and winter 1982 data indicates that no significant net change in salinity has occurred during this 10-year period. An analysis of the few available historical data (1895, 1923, 1959–1961, and 1964) supports the hypothesis that groundwater salinity in this irrigated area has reached a long-term dynamic equilibrium in response to irrigation practices. The model predictions of long-term salinity increases were invalid probably because the calibration period occurred during a short-term annual trend of increasing salinity in the river (and hence in leaky irrigation canals and in applied irrigation water), which was not representative of the long-term trend.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/WR021i011p01611","usgsCitation":"Konikow, L.F., and Person, M., 1985, Assessment of long-term salinity changes in an irrigated stream-aquifer system: Water Resources Research, v. 21, no. 11, p. 1611-1624, https://doi.org/10.1029/WR021i011p01611.","productDescription":"14 p.","startPage":"1611","endPage":"1624","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":220405,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Colorado","otherGeospatial":"Arkansas River valley","volume":"21","issue":"11","noUsgsAuthors":false,"publicationDate":"2008-01-08","publicationStatus":"PW","scienceBaseUri":"5059e637e4b0c8380cd47268","contributors":{"authors":[{"text":"Konikow, Leonard F. 0000-0002-0940-3856 lkonikow@usgs.gov","orcid":"https://orcid.org/0000-0002-0940-3856","contributorId":158,"corporation":false,"usgs":true,"family":"Konikow","given":"Leonard","email":"lkonikow@usgs.gov","middleInitial":"F.","affiliations":[{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":true,"id":365210,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Person, Mark","contributorId":55568,"corporation":false,"usgs":true,"family":"Person","given":"Mark","affiliations":[],"preferred":false,"id":365211,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70013066,"text":"70013066 - 1985 - Absolute calibration of Landsat instruments using the moon.","interactions":[],"lastModifiedDate":"2012-03-12T17:18:38","indexId":"70013066","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3052,"text":"Photogrammetric Engineering and Remote Sensing","active":true,"publicationSubtype":{"id":10}},"title":"Absolute calibration of Landsat instruments using the moon.","docAbstract":"A lunar observation by Landsat could provide improved radiometric and geometric calibration of both the Thematic Mapper and the Multispectral Scanner in terms of absolute radiometry, determination of the modulation transfer function, and sensitivity to scattered light. A pitch of the spacecraft would be required. -Authors","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Photogrammetric Engineering and Remote Sensing","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","usgsCitation":"Kieffer, H.H., and Wildey, R., 1985, Absolute calibration of Landsat instruments using the moon.: Photogrammetric Engineering and Remote Sensing, v. 51, no. 9, p. 1391-1393.","startPage":"1391","endPage":"1393","numberOfPages":"3","costCenters":[],"links":[{"id":220349,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"51","issue":"9","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e64ae4b0c8380cd47308","contributors":{"authors":[{"text":"Kieffer, H. H.","contributorId":40725,"corporation":false,"usgs":false,"family":"Kieffer","given":"H.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":365206,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wildey, R.L.","contributorId":9700,"corporation":false,"usgs":true,"family":"Wildey","given":"R.L.","email":"","affiliations":[],"preferred":false,"id":365205,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70013064,"text":"70013064 - 1985 - Lacustrine-humate model for primary uranium ore deposits, Grants uranium region, New Mexico","interactions":[],"lastModifiedDate":"2023-01-12T17:04:16.864261","indexId":"70013064","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":701,"text":"American Association of Petroleum Geologists Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Lacustrine-humate model for primary uranium ore deposits, Grants uranium region, New Mexico","docAbstract":"Two generations of uranium ore, primary and redistributed, occur in fluvial sandstones of the Upper Jurassic Morrison Formation in the San Juan basin; the two stages of ore formation can be related to the hydrologic history of the basin. Primary ore formed soon after Morrison deposition, in the Late Jurassic to Early Cretaceous, and a model, the lacustrine-humate model, is offered that views primary mineralization as a diagenetic event related to early pore fluid evolution. The basic premise is that the humate, a pore-filling organic material closely associated with primary ore, originated as humic acids dissolved in pore waters of greenish-gray lacustrine mudstones deposited in the mud-flat facies of the Brushy Basin Member and similar \"K\" shale beds in the Westwater Can on Member. During compaction associated with early burial, formation water expelled from lacustrine mudstone units carried these humic acids into adjacent sandstone beds where the organics precipitated, forming the humate deposits that concentrated uranium.
During the Tertiary, much later in the hydrologic history of the basin, when Jurassic sediments were largely compacted, oxygenated ground water flowed basinward from uplifted basin margins. This invasion of Morrison sandstone beds by oxidizing ground waters redistributed uranium from primary ores along redox boundaries, forming ore deposits that resemble roll-front-type uranium ores.
","language":"English","publisher":"American Association of Petroleum Geologists (AAPG)","doi":"10.1306/94885589-1704-11D7-8645000102C1865D","usgsCitation":"Turner-Peterson, C., 1985, Lacustrine-humate model for primary uranium ore deposits, Grants uranium region, New Mexico: American Association of Petroleum Geologists Bulletin, v. 69, no. 11, p. 1990-2020, https://doi.org/10.1306/94885589-1704-11D7-8645000102C1865D.","productDescription":"31 p.","startPage":"1990","endPage":"2020","numberOfPages":"31","costCenters":[],"links":[{"id":220347,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"New Mexico","otherGeospatial":"Grants uranium region","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -108.64038174995106,\n 36.04693775500846\n ],\n [\n -108.64038174995106,\n 34.70563438153877\n ],\n [\n -106.912022747075,\n 34.70563438153877\n ],\n [\n -106.912022747075,\n 36.04693775500846\n ],\n [\n -108.64038174995106,\n 36.04693775500846\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"69","issue":"11","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a4130e4b0c8380cd6537f","contributors":{"authors":[{"text":"Turner-Peterson, C. E.","contributorId":53958,"corporation":false,"usgs":true,"family":"Turner-Peterson","given":"C. E.","affiliations":[],"preferred":false,"id":365203,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70013058,"text":"70013058 - 1985 - Streamflow variability in the United States: 1931-1978.","interactions":[],"lastModifiedDate":"2013-03-14T13:07:20","indexId":"70013058","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2217,"text":"Journal of Climate and Applied Meteorology","active":true,"publicationSubtype":{"id":10}},"title":"Streamflow variability in the United States: 1931-1978.","docAbstract":"Systematic modes of spatial and temporal variation in a 48-year record of streamflow are defined using principal components. The components were calculated from a matrix of annual streamflow departures for 106 grid cells covering the United States in the years 1931-78. Five statistically significant components are found to account for more than 56% of the total variance. A varimax orthogonal rotation of the original components describes regional anomaly cores located in the middle Mississippi Valley, Pacific Northwest, Far West, Northeast, and northern Great Plains. -from Author","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Climate and Applied Meteorology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1175/1520-0450(1985)024<0463:SVITUS>2.0.CO;2","usgsCitation":"Lins, H., 1985, Streamflow variability in the United States: 1931-1978.: Journal of Climate and Applied Meteorology, v. 24, no. 5, p. 463-471, https://doi.org/10.1175/1520-0450(1985)024<0463:SVITUS>2.0.CO;2.","startPage":"463","endPage":"471","numberOfPages":"9","costCenters":[],"links":[{"id":487166,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1175/1520-0450(1985)024<0463:svitus>2.0.co;2","text":"Publisher Index Page"},{"id":220287,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":269328,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1175/1520-0450(1985)024<0463:SVITUS>2.0.CO;2"}],"volume":"24","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9b26e4b08c986b31cceb","contributors":{"authors":[{"text":"Lins, H.F.","contributorId":81508,"corporation":false,"usgs":true,"family":"Lins","given":"H.F.","affiliations":[],"preferred":false,"id":365191,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70013052,"text":"70013052 - 1985 - A nomogram for interpreting slope stability of fine-grained deposits in modern and ancient-marine environments.","interactions":[],"lastModifiedDate":"2024-05-21T11:17:03.144979","indexId":"70013052","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","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":"A nomogram for interpreting slope stability of fine-grained deposits in modern and ancient-marine environments.","docAbstract":"Design of the nomogram is based on effective stress and combines consolidation theory as applicable to depositional environments with the infinite-slope model of slope-stability analysis. The link between the two combined theories is a term representing the effective overburden stress, which may be predicted from consolidation theory and a knowledge of sedimentation rate, time, and the coefficient of consolidation. In turn, if infinite-slope conditions are assumed to exist, the effective overburden stress can be used to derive a factor of safety against static slope failure by using the angle of internal friction and the slope angle. The nomogram applies to depostitional settings in which fine-grained sediment has accumulated at a relatively constant rate upon a base that is essentially impermeable. The model further assumes that the lateral extent of sediment affected by any mass movement will be great compared to its thickness and that no outside agents (e.g., cements, gas) are influencing the section. The nomogram is applicable to static conditions (inherent stability of the slope) and certain dynamic conditions (such as earthquakes). It may be used to investigate mass movements in the geologic past as well as those in modern environments.--Modified journal abstract.
Limnocythere bradburyi is a new species of nonmarine ostracode that is living in several lakes in the central Mexican Plateau. These lakes are shallow, turbid, and pan-shaped, having relatively unstable and fluid substrates. Water levels of these lakes are high in the summer and low or dry in the winter. These lakes usually contain fresh to slightly saline water during the rainy season (summer-fall) and slightly saline water during the dry season (winter-spring), and have solute composition that is dominated by Na+, HCO3--CO32-, Cl- ions. The regional climate is characterized as humid temperate with mild equitable temperatures throughout the year. Winter temperatures are usually above 0oC, whereas summer temperatures are commonly below 30oC. The water temperature of the lakes containing L. bradburyi generally reflects atmospheric temperatures. The ostracode's life cycle coincides with the climatic wet cycle and is therefore completed during the warmest period of the year, which is in marked contrast to ostracodes living in lakes in the US and Canada that usually begin their life cycle with the spring rain and snow melt in cold water and complete their life cycle in warm water. This contrasting climatic life-cycle pattern between central Mexico and the US may be sufficient to explain why L. bradburyi occurs commonly in many Quaternary deposits in the southwestern US, but has not been found living in the US.
","language":"English","publisher":"Paleontological Society","issn":"00223360","usgsCitation":"Forester, R.M., 1985, Limnocythere bradburyi n.sp.: a modern ostracode from central Mexico and a possible Quaternary paleoclimatic indicator: Journal of Paleontology, v. 59, no. 1, p. 8-20.","productDescription":"13 p.","startPage":"8","endPage":"20","numberOfPages":"13","costCenters":[],"links":[{"id":430406,"rank":2,"type":{"id":15,"text":"Index Page"},"url":"https://www.jstor.org/stable/1304823"},{"id":220121,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"59","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a4797e4b0c8380cd678e9","contributors":{"authors":[{"text":"Forester, R. M.","contributorId":76332,"corporation":false,"usgs":true,"family":"Forester","given":"R.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":365160,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70013045,"text":"70013045 - 1985 - Seasonal variation in sediment transport on the Russian River shelf, California","interactions":[],"lastModifiedDate":"2023-12-04T15:06:31.77465","indexId":"70013045","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1333,"text":"Continental Shelf Research","active":true,"publicationSubtype":{"id":10}},"title":"Seasonal variation in sediment transport on the Russian River shelf, California","docAbstract":"Near-bottom currents, light transmission and scattering, and bottom pressure were measured with GEOPROBE tripods and vector-averaging current meters during June 1979 to April 1980 on the central shelf 10 km west of the Russian River, California. The instruments were located on the mid-shelf mud belt composed of bimodal sandy clayey silts contributed principally by the Russian River. During the summer season of persistent northwesterly, upwelling-favorable winds, the average and maximum current speeds 5 m above the bottom were 11 and 31 cm s−1, respectively. The mean (subtidal) flow at 5 m above bottom was poleward and slightly offshore at about 6 cm s−1. The strongest wave-generated bottom currents were about 10 cm s−1, but oscillatory velocities > 5 cm s−1 were infrequent. Suspended-matter concentrations, derived from the optical data at 1.9 m above the bottom, ranged from 1 to 6 mg l−1. The optical data show that the currents and waves were generally below threshold levels for sediment erosion through the summer. In contrast, during the autumn and, particularly, the winter months, the average and maximum concentrations of suspended matter increased substantially. The increases were primarily caused by larger waves from distant storms and short intervals of strong currents associated with local storms and, secondarily, by the large seasonal flow of the Russian River. Wind-driven and wave-generated bottom currents were as large as 37 and 45 cm s−1, respectively, during local storms in December 1979 and February 1980. Suspended-matter concentrations averaged about 7 mg l−1 during non-storm winter periods, but increased to nearly 150 mg l−1 during a December storm. Estimates of suspended-matter flux near the bottom show that the local winter storms, which had a combined duration of about 12 days, could account for 30 to 50% of the total annual suspended-sediment transport at the mid-shelf site. Although intervals of large swell were at times superimposed on southward advective currents, the major sediment-transport events were caused by strong southerly winds that produced poleward bottom currents with a significant offshore component. The primary aspects of the distribution of modern sediments on this shelf are in good agreement with the observed poleward transport.
","language":"English","publisher":"Elsevier","doi":"10.1016/0278-4343(85)90007-X","usgsCitation":"Drake, D., and Cacchione, D., 1985, Seasonal variation in sediment transport on the Russian River shelf, California: Continental Shelf Research, v. 4, no. 5, p. 495-514, https://doi.org/10.1016/0278-4343(85)90007-X.","productDescription":"20 p.","startPage":"495","endPage":"514","numberOfPages":"20","costCenters":[],"links":[{"id":220120,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Russian River shelf","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -123.51559980216115,\n 38.6469199916873\n ],\n [\n -123.51559980216115,\n 38.21661585272099\n ],\n [\n -122.84406049552042,\n 38.21661585272099\n ],\n [\n -122.84406049552042,\n 38.6469199916873\n ],\n [\n -123.51559980216115,\n 38.6469199916873\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"4","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b88ece4b08c986b316c39","contributors":{"authors":[{"text":"Drake, D.E.","contributorId":48150,"corporation":false,"usgs":true,"family":"Drake","given":"D.E.","email":"","affiliations":[],"preferred":false,"id":365158,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cacchione, D.A.","contributorId":65448,"corporation":false,"usgs":true,"family":"Cacchione","given":"D.A.","affiliations":[{"id":520,"text":"Pacific Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":false,"id":365159,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70013037,"text":"70013037 - 1985 - Persisting effects of armored military maneuvers on some soils of the Mojave Desert","interactions":[],"lastModifiedDate":"2012-03-12T17:18:36","indexId":"70013037","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1540,"text":"Environmental Geology and Water Sciences","active":true,"publicationSubtype":{"id":10}},"title":"Persisting effects of armored military maneuvers on some soils of the Mojave Desert","docAbstract":"Soil compaction and substrate modification produced during large-scale armored military maneuvers in the early 1940s were examined in 1981 at seven sites in California's eastern Mojave Desert Recording penetrometer measurements show that tracks left by a single pass of an M3 \"medium\" tank have average soil resistance values that are 50% greater than those of the surrounding untracked soil in the upper 20 cm At one site, measurements made along short segments of track that have been visually eliminated by erosion and deposition processes show a 73% increase in penetrometer resistance over adjacent, undisturbed soils Dirt roadways at three former base camp locations could not be penetrated below 5-10 cm because of extreme compaction Soil bulk density was not as sensitive an indicator of soil compaction as was penetrometer resistance Density values in the upper 10 cm of soil are not significantly different between tank tracks and undisturbed soils at most sites, and roadways at two base camps show an average increase in bulk density of only 12% over adjacent soils. Trench excavations across tank tracks show that physical modifications of the substrate can extend vertically beneath a track to a depth of 25 cm and outward from a track's edge to 50 cm These soil disturbances are probably major factors that encourage accelerated soil erosion throughout the manuever area and also retard or prevent the return of vegetation to pre-disturbance conditions ?? 1985 Springer-Verlag New York Inc.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Geology and Water Sciences","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Springer-Verlag","doi":"10.1007/BF02528800","issn":"00990094","usgsCitation":"Prose, D., 1985, Persisting effects of armored military maneuvers on some soils of the Mojave Desert: Environmental Geology and Water Sciences, v. 7, no. 3, p. 163-170, https://doi.org/10.1007/BF02528800.","startPage":"163","endPage":"170","numberOfPages":"8","costCenters":[],"links":[{"id":204997,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF02528800"},{"id":220010,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"7","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a76ffe4b0c8380cd783dc","contributors":{"authors":[{"text":"Prose, D.V.","contributorId":92682,"corporation":false,"usgs":true,"family":"Prose","given":"D.V.","email":"","affiliations":[],"preferred":false,"id":365136,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70013036,"text":"70013036 - 1985 - Water balance models in one-month-ahead streamflow forecasting","interactions":[],"lastModifiedDate":"2018-02-12T18:00:25","indexId":"70013036","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","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":"Water balance models in one-month-ahead streamflow forecasting","docAbstract":"Techniques are tested that incorporate information from water balance models in making 1-month-ahead streamflow forecasts in New Jersey. The results are compared to those based on simple autoregressive time series models. The relative performance of the models is dependent on the month of the year in question. The water balance models are most useful for forecasts of April and May flows. For the stations in northern New Jersey, the April and May forecasts were made in order of decreasing reliability using the water-balance-based approaches, using the historical monthly means, and using simple autoregressive models. The water balance models were useful to a lesser extent for forecasts during the fall months. For the rest of the year the improvements in forecasts over those obtained using the simpler autoregressive models were either very small or the simpler models provided better forecasts. When using the water balance models, monthly corrections for bias are found to improve minimum mean-square-error forecasts as well as to improve estimates of the forecast conditional distributions.
Isotopic studies of the Rb-Sr and U-Th-Pb systems in whole-rock samples and the U-Pb systematics for zircons document the existence of two late Arehean intrusive events in the Wind River Range. All of the systems examined indicate an age of ∼2,630 ± 20 m.y. for the Louis Lake batholith. Apparent ages for the Bears Ears pluton range from 2,504 ± 40 m.y. to 2,575 ± 50 m.y. The scatter in apparent ages for the Bears Ears pluton does not appear to be primarily the result of disturbance by postintrusive events, but it may be explained by an isotopically inhomogenous magma at the time of intrusion.
Data for a few samples indicate that the Wind River Range was affected locally by a postmagmatic hydrothermal event that was approximately Tertiary in age. This event lowered δ18O values and disturbed parent-daughter relationships in most of the isotopic systems investigated, but it was recent enough that there is no demonstrable effect in the Pb-Pb system.
The Bears Ears pluton has some chemical and petrologic features that are similar to those reported for the granites in the Granite Mountains to the east. These granites are spatially associated with low-temperature uranium deposits of Tertiary age and have been shown to have lost large amounts of uranium during the early to middle Tertiary. U-Pb systematics indicate, however, that the low to moderate uranium contents and highly variable Th/U values noted for the Bears Ears pluton are best interpreted as being primary features. If uranium was lost after magma generation, the loss most likely occurred at the time of intrusion. Such a loss could account for uraniferous Precambrian pegmatites southwest of the main part of the Range.
The two intrusive units apparently were derived from different protoliths that were formed during early to middle Archean. Initial isotopic ratios and petrochemistry for the Louis Lake batholith are consistent with an early Archean trondhjemitic to tonalitic source. The protolith for the Bears Ears pluton must have been more evolved and somewhat younger. Inconsistencies as to the degree of evolution of this protolith, as inferred from isotopic and trace-element data, suggest that the protolith may have been subjected to high-grade meta-morphism that caused loss of Rb and U prior to generation of the magma.
Germanium is enriched in the following geologic environments:
(1) iron meteorites and terrestrial iron-nickel;
(2) sulfide ore deposits, particularly those hosted by sedimentary rocks;
(3) iron oxide deposits;
(4) oxidized zones of Ge-bearing sulfide deposits;
(5) pegmatites, greisens, and skarns; and
(6) coal and lignitized wood.
In silicate melts, Ge is highly siderophile in the presence of native iron-nickel; otherwise, it is highly lithophile. Among silicate minerals, Ge is concentrated in those having less polymerized silicate tetrahedra such as olivine and topaz. In deposits formed from hydrothermal solutions, Ge tends to be enriched mostly in either sulfides or in fluorine-bearing phases; it is thus concentrated both in some hydrothermal sulfide deposits and in pegmatites, greisens, and skarns. In sulfide deposits that formed from solutions having low to moderate sulfur activity, Ge is concentrated in sphalerite in amounts up to 3000 ppm. Sulfide deposits that formed from solutions having higher sulfur activity allowed Ge to either form its own sulfides, particularly with Cu, or to substitute for As, Sn, or other metals in sulfosalts. The Ge in hydrothermal fluids probably derives from enrichment during the fractional crystallization of igneous fluids, or is due to the incorporation of Ge from the country rocks, particularly from those containing organic material. Germanium bonds to lignin-derivative organic compounds that are found in peat and lignite, accounting for its common concentration in coals and related organic material. Germanium is precipitated from water together with iron hydroxide, accounting for its concentration in some sedimentary and supergene iron oxide deposits. It also is able to substitute for Fe in magnetite in a variety of geologic environments. In the oxidized zone of Ge-bearing sulfide deposits, Ge is concentrated in oxides, hydroxides, and hydroxy-sulfates, sometimes forming its own minerals. It is particularly enriched in some iron- and manganese-bearing oxides and hydroxides, including goethite (up to 5300 ppm) and hematite (up to 7000 ppm).
Sorption of chromium VI on the iron-oxide- and hydroxide-coated surface of alluvial material was numerically simulated with rate-controlled reactions. Reaction kinetics and diffusional processes, in the form of film, pore, and particle diffusion, were simulated and compared with experimental results. The use of empirically calculated rate coefficients for diffusion through the reacting surface was found to simulate experimental data; pore or particle diffusion is believed to be a possible rate-controlling mechanism. The use of rate equations to predict conservative transport and rate- and local-equilibrium-controlled reactions was shown to be feasible.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/WR021i011p01703","usgsCitation":"Grove, D., and Stollenwerk, K.G., 1985, Modeling the rate-controlled sorption of hexavalent chromium: Water Resources Research, v. 21, no. 11, p. 1703-1709, https://doi.org/10.1029/WR021i011p01703.","productDescription":"7 p.","startPage":"1703","endPage":"1709","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":220671,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"21","issue":"11","noUsgsAuthors":false,"publicationDate":"2008-01-08","publicationStatus":"PW","scienceBaseUri":"505a4ad4e4b0c8380cd690ab","contributors":{"authors":[{"text":"Grove, D.B.","contributorId":56689,"corporation":false,"usgs":true,"family":"Grove","given":"D.B.","email":"","affiliations":[],"preferred":false,"id":365086,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Stollenwerk, Kenneth G. kgstolle@usgs.gov","contributorId":578,"corporation":false,"usgs":true,"family":"Stollenwerk","given":"Kenneth","email":"kgstolle@usgs.gov","middleInitial":"G.","affiliations":[],"preferred":true,"id":779757,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70013009,"text":"70013009 - 1985 - Franciscan complex calera limestones: Accreted remnants of farallon plate oceanic plateaus","interactions":[],"lastModifiedDate":"2012-03-12T17:18:28","indexId":"70013009","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2840,"text":"Nature","active":true,"publicationSubtype":{"id":10}},"title":"Franciscan complex calera limestones: Accreted remnants of farallon plate oceanic plateaus","docAbstract":"The Calera Limestone, part of the Franciscan Complex of northern California, may have formed in a palaeoenvironment similar to Hess and Shatsky Rises of the present north-west Pacific1. We report here new palaeomagnetic results, palaeontological data and recent plate-motion models that reinforce this assertion. The Calera Limestone may have formed on Farallon Plate plateaus, north of the Pacific-Farallon spreading centre as a counterpart to Hess or Shatsky Rises. In one model2, the plateaus were formed by hotspots close to the Farallon_Pacific ridge axis. On accretion to North America, plateau dissection in the late Cretaceous to Eocene (50-70 Myr) could explain the occurrence of large volumes of pillow basalt and exotic blocks of limestone in the Franciscan Complex. Partial subduction of the plateaus could have contributed to Laramide (70-40 Myr) compressional events3. ?? 1985 Nature Publishing Group.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Nature","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1038/317345a0","issn":"00280836","usgsCitation":"Tarduno, J., McWilliams, M., Debiche, M., Sliter, W., and Blake, M., 1985, Franciscan complex calera limestones: Accreted remnants of farallon plate oceanic plateaus: Nature, v. 317, no. 6035, p. 345-347, https://doi.org/10.1038/317345a0.","startPage":"345","endPage":"347","numberOfPages":"3","costCenters":[],"links":[{"id":487224,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://zenodo.org/record/1233039","text":"External Repository"},{"id":220564,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":205047,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1038/317345a0"}],"volume":"317","issue":"6035","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a13bde4b0c8380cd54776","contributors":{"authors":[{"text":"Tarduno, J.A.","contributorId":20898,"corporation":false,"usgs":true,"family":"Tarduno","given":"J.A.","affiliations":[],"preferred":false,"id":365059,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McWilliams, M.","contributorId":39121,"corporation":false,"usgs":true,"family":"McWilliams","given":"M.","email":"","affiliations":[],"preferred":false,"id":365061,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Debiche, M.G.","contributorId":86103,"corporation":false,"usgs":true,"family":"Debiche","given":"M.G.","email":"","affiliations":[],"preferred":false,"id":365062,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Sliter, W.V.","contributorId":38997,"corporation":false,"usgs":true,"family":"Sliter","given":"W.V.","email":"","affiliations":[],"preferred":false,"id":365060,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Blake, M.C.","contributorId":8470,"corporation":false,"usgs":true,"family":"Blake","given":"M.C.","email":"","affiliations":[],"preferred":false,"id":365058,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70013008,"text":"70013008 - 1985 - Partition coefficients of organic compounds in lipid-water systems and correlations with fish bioconcentration factors","interactions":[],"lastModifiedDate":"2020-01-19T10:45:20","indexId":"70013008","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1565,"text":"Environmental Science & Technology","onlineIssn":"1520-5851","printIssn":"0013-936X","active":true,"publicationSubtype":{"id":10}},"title":"Partition coefficients of organic compounds in lipid-water systems and correlations with fish bioconcentration factors","docAbstract":"Triolein-water partition coefficients (KtW) have been determined for 38 slightly water-soluble organic compounds, and their magnitudes have been compared with the corresponding octanol-water partition coefficients (KOW). In the absence of major solvent-solute interaction effects in the organic solvent phase, the conventional treatment (based on Raoult's law) predicts sharply lower partition coefficients for most of the solutes in triolein because of its considerably higher molecular weight, whereas the Flory-Huggins treatment predicts higher partition coefficients with triolein. The data are in much better agreement with the Flory-Huggins model. As expected from the similarity in the partition coefficients, the water solubility (which was previously found to be the major determinant of the KOW) is also the major determinant for the Ktw. When the published BCF values (bioconcentration factors) of organic compounds in fish are based on the lipid content rather than on total mass, they are approximately equal to the Ktw, which suggests at least near equilibrium for solute partitioning between water and fish lipid. The close correlation between Ktw and Kow suggests that Kow is also a good predictor for lipid-water partition coefficients and bioconcentration factors.","language":"English","publisher":"ACS","doi":"10.1021/es00131a005","issn":"0013936X","usgsCitation":"Chiou, C.T., 1985, Partition coefficients of organic compounds in lipid-water systems and correlations with fish bioconcentration factors: Environmental Science & Technology, v. 19, no. 1, p. 57-62, https://doi.org/10.1021/es00131a005.","productDescription":"6 p.","startPage":"57","endPage":"62","numberOfPages":"6","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":220563,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"19","issue":"1","noUsgsAuthors":false,"publicationDate":"2002-05-01","publicationStatus":"PW","scienceBaseUri":"505a753be4b0c8380cd77a5f","contributors":{"authors":[{"text":"Chiou, C. T.","contributorId":97080,"corporation":false,"usgs":true,"family":"Chiou","given":"C.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":365057,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70013007,"text":"70013007 - 1985 - Erosion of the Laurentide region of North America by glacial and glaciofluvial processes","interactions":[],"lastModifiedDate":"2013-01-26T15:37:37","indexId":"70013007","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","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":"Erosion of the Laurentide region of North America by glacial and glaciofluvial processes","docAbstract":"Collection of seismic reflection data from continental margins and ocean basins surrounding North America makes it possible to estimate the amount of material eroded from the area formerly covered by Laurentide ice sheets since major glaciation began in North America. A minimum estimate is made of 1.62 ?? 106 km3, or an average 120 m of rock physically eroded from the Laurentide region. This figure is an order of magnitude higher than earlier estimates based on the volume of glacial drift, Cenozoic marine sediments, and modern sediment loads of rivers. Most of the sediment produced during Laurentide glaciation has already been transported to the oceans. The importance of continental glaciation as a geomorphic agency in North America may have to be reevaluated. Evidence from sedimentation rates in ocean basins surrounding Greenland and Antarctica suggests that sediment production, sediment transport, and possibly denudation by permanent ice caps may be substantially lower than by periodic ice caps, such as the Laurentide. Low rates of sediment survival from the time of the Permo-Carboniferous and Precambrian glaciations suggest that predominance of marine deposition during some glacial epochs results in shorter lived sediment because of preferential tectonism and cycling of oceanic crust versus continental crust. ?? 1985.","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(85)90026-2","issn":"00335894","usgsCitation":"Bell, M., and Laine, E., 1985, Erosion of the Laurentide region of North America by glacial and glaciofluvial processes: Quaternary Research, v. 23, no. 2, p. 154-174, https://doi.org/10.1016/0033-5894(85)90026-2.","startPage":"154","endPage":"174","numberOfPages":"21","costCenters":[],"links":[{"id":266547,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/0033-5894(85)90026-2"},{"id":220562,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"2","noUsgsAuthors":false,"publicationDate":"2017-01-20","publicationStatus":"PW","scienceBaseUri":"505a0a3de4b0c8380cd52272","contributors":{"authors":[{"text":"Bell, M.","contributorId":74138,"corporation":false,"usgs":true,"family":"Bell","given":"M.","email":"","affiliations":[],"preferred":false,"id":365056,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Laine, E.P.","contributorId":64385,"corporation":false,"usgs":true,"family":"Laine","given":"E.P.","email":"","affiliations":[],"preferred":false,"id":365055,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70013006,"text":"70013006 - 1985 - Correlations among hydrocarbon microseepage, soil chemistry, and uptake of micronutrients by plants, Bell Creek oil field, Montana","interactions":[],"lastModifiedDate":"2024-04-18T23:57:41.309704","indexId":"70013006","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","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":"Correlations among hydrocarbon microseepage, soil chemistry, and uptake of micronutrients by plants, Bell Creek oil field, Montana","docAbstract":"Chelate-extractable iron and manganese concentrations in soils over and around the Bell Creek oil field suggest that compared to low average background values, there are moderate amounts of these elements directly over the production area and higher concentrations distributed in an aureole pattern around the periphery of the field. Adsorbed and organically bound iron and manganese appear to be readily taken up by plants resulting in anomalously high levels of these elements in leaves and needles over the oil field and suggesting correlation with corresponding low concentrations in soils. Iron and manganese appear to have bypassed the soil formation process where, under normal oxidizing conditions, they would have ultimately precipitated as insoluble oxides and hydroxides.
The magnetotelluric geophysical method has been used effectively as a hydrocarbon exploration tool in the intracratonic Parana basin of South America. The Parana basin has an area of about 1,200,000 km2 (463,000 mi2), extending over portions of Brazil, Paraguay, Uruguay, Argentina, and Bolivia. The Paleozoic marine sedimentary rocks in the Parana basin are covered by the world's most extensive flood basalt complex, making geophysical exploration extremely difficult, although modern seismic techniques recently applied are achieving good results in some areas. The 1-2 km (3,300-6,600 ft) thick surface basalts and buried diabase sills pose no problem for the magnetotelluric method because the natural electromagnetic fields used as the energy source pass easily through the basalt. Data for the regional study were taken on six profiles with soundings spaced 8 to 15 km (5 to 9 mi) apart. The magnetotelluric sounding data outline a linear uplift known as the Ponta Grossa arch. This major structural feature cuts across the northeast-trending intracratonic basin almost perpendicularly, and is injected with numerous diabase dikes. Although its character is reasonably well known in the shallow, eastern parts of the basin, it is poorly delineated in the deeper parts of the basin where promising natural gas zones have been tested in several wells.
In the survey area, MT interpretations show that basalts have aggregate thickness of as much as 2 km (6,600 ft), and basement may be as much as 6 km (20,000 ft) below the surface. Over most of the basin, the basalts are covered by Upper Cretaceous to Holocene continental sediments of a few hundred meters thickness and are underlain by 2 to 4 km (6,600 to 13,100 ft) thick Paleozoic sediments with possible hydrocarbon potential. The Ponta Grossa arch is interpreted to be the failed arm of a triple rift system that formed during the separation of the African and South American continents. Shales of the Devonian Ponta Grossa Formation are important Parana basin source rocks for hydrocarbons, as are several Permian units. Significant electrical contrasts occur between the Permian sediments and older units, so that magnetotelluric measurements can give an indication of the regional thickness of the Permian and younger sediments to aid in interpreting hydrocarbon migration patterns and possible trap areas.
","language":"English","publisher":"American Association of Petroleum Geologists","doi":"10.1306/AD4624E8-16F7-11D7-8645000102C1865D","usgsCitation":"Stanley, W., Saad, A.R., and Ohofugi, W., 1985, Regional magnetotelluric surveys in hydrocarbon exploration, Parana Basin, Brazil: American Association of Petroleum Geologists Bulletin, v. 69, no. 3, p. 346-360, https://doi.org/10.1306/AD4624E8-16F7-11D7-8645000102C1865D.","productDescription":"15 p.","startPage":"346","endPage":"360","numberOfPages":"15","costCenters":[],"links":[{"id":220507,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Brazil","otherGeospatial":"Parana Basin","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -54.160784424395956,\n -24.04001271402015\n ],\n [\n -53.56775141880476,\n -26.510310575826978\n ],\n [\n -54.018942546070036,\n -27.535650918603928\n ],\n [\n -55.61490177660099,\n -28.15328458952623\n ],\n [\n -57.026198012680666,\n -29.85285453824617\n ],\n [\n -56.16009379363277,\n -30.63592533134573\n ],\n [\n -54.20017294070783,\n -31.705551346072788\n ],\n [\n -52.512803653932394,\n -31.05901390285873\n ],\n [\n -51.368602067567736,\n -29.84047960357273\n ],\n [\n -50.174227290258926,\n -27.66083523147509\n ],\n [\n -49.1575844849707,\n -24.511980415836106\n ],\n [\n -49.9729245515324,\n -22.911714837871344\n ],\n [\n -52.791187805255475,\n -22.61789226143965\n ],\n [\n -53.77378385386086,\n -23.19162413103946\n ],\n [\n -54.160784424395956,\n -24.04001271402015\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"69","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a933ee4b0c8380cd80cd3","contributors":{"authors":[{"text":"Stanley, William D.","contributorId":23274,"corporation":false,"usgs":true,"family":"Stanley","given":"William D.","affiliations":[],"preferred":false,"id":365048,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Saad, Antonio Roberto Roberto","contributorId":98466,"corporation":false,"usgs":true,"family":"Saad","given":"Antonio","suffix":"Roberto","email":"","middleInitial":"Roberto","affiliations":[],"preferred":false,"id":365050,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ohofugi, Walter","contributorId":23685,"corporation":false,"usgs":true,"family":"Ohofugi","given":"Walter","email":"","affiliations":[],"preferred":false,"id":365049,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70013001,"text":"70013001 - 1985 - The plumbotectonics of the West Shasta mining district, eastern Klamath Mountains, California","interactions":[],"lastModifiedDate":"2024-01-08T23:19:13.416275","indexId":"70013001","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","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":"The plumbotectonics of the West Shasta mining district, eastern Klamath Mountains, California","docAbstract":"The tectonic setting comprising the West Shasta mining district has often been compared with that of primitive island arcs. Concentrations of uranium, thorium, and lead and lead isotope compositions were determined for Devonian ores and rocks of the West Shasta district, eastern Klamath Mountains, California, to help evaluate the tectonic classification. The lead isotope pattern is found to be complex. From comparison of the data with those on younger ores and rocks in the region and with those isotopic patterns found in modern tectonic terranes, however, a number of conclusions are possible. A lead isotope point for the Devonian oceanic mantle is now well established from this study on the West Shasta district. This isotopic composition is in agreement with that suggested by Slawson in 1983--i.e., from a sample of massive sulfide ore from the Golinsky deposit--with a 206 Pb/ 204 Pb of 17.830, a 207 Pb/ 204 Pb of 15.450, and a 208 Pb/ 204 Pb of 37.313. If the Devonian mantle is analogous to the modern mantle, the determined value is probably at the more radiogenic end of the Devonian oceanic mantle array.Some samples of volcanic rocks and ores that have elevated values of 207 Pb/ 204 Pb and 208 Pb/ 204 Pb indicate that subducted pelagic sediments or interaction of the magmas with other sediments downsection have been involved to varying degrees in the generation of magmas. The high ratios were not attained by addition of lead to the volcanic rocks or ores during subsequent magmatic events, such as intrusion of the Permian Pit River stock to the east or of the Cretaceous Shasta Bally batholith that crops out to the south and west and may underlie part of the district. Some values of 207 Pb/ 204 Pb are sufficiently high as to suggest that West Shasta may have developed nearer a continent than was previously supposed. Lead isotope data for Quaternary volcanic rocks are somewhat more radiogenic than for Cretaceous ores and plutonic rocks. Permo-Triassic ores are again a bit less radiogenic. The isotopic differences between the Permo-Triassic and Quaternary data could be accounted for by a value for 238 U/ 204 Pb of 10.42 in common source material. Using this value of 238 U/ 204 Pb to calculate even further back to 400 m.y., the resulting ratios are found to fall very close to the \"best value\" for the lead isotope mixing line between the Devonian mantle and pelagic sediments. We interpret this intersection to be the \"mean value\" for the assimilated Devonian sediment lead--18.250 for 206 Pb/ 204 Pb and 15.582 for 207 Pb/ 204 Pb. As deduced for the lead isotope composition for the Devonian mantle at this location, the pelagic sediment, lead isotope composition also is toward the more radiogenic end of the values expected for pelagic sediments in the Devonian. Lack of sediments in the observed volcanic section of the West Shasta district suggests a submerged volcanic-arc setting (as interpreted by others for the Troodos and Samail ophiolites) rather than an island-arc situation (such as the Green Tuff area of Japan) or an incipient spreading ridge setting (that might have grown to be a subaerial Iceland). The elevated values of 207 Pb/ 204 Pb for some samples suggest a submerged volcanic are whereas the exceedingly low values of thorium--which is not easily mobilized during alteration events--for both basaltic andesites and plagiorhyolites is suggestive of depleted source material such as is found for most oceanic spreading centers. Elevated values of 207 Pb/ 204 Pb are exceedingly rare in midocean ridge basalts and low contents of thorium are known in island arcs, so a submerged volcanic arc is the preferred interpretation. Some similarity exists between the 206 Pb/ 204 Pb values of Devonian ores having elevated values of 207 Pb/ 204 Pb and those of the Permo-Triassic ores of the East Shasta district, as mentioned by Slawson in 1983. This similarity is now confirmed to be a coincidence. We find it due first of all to some incorporation of sediment lead in the magmas, followed later by some migration of radiogenic lead--probably locally derived--into the ores during subsequent events. Because there was some postdepositional lead migration into the ores, some migration of copper also into the ores cannot be excluded. Lead, especially radiogenic lead, however, is more mobile than copper. As the migrating lead is deduced to have been locally derived from the observed section rather than exotically derived, any copper added was probably locally derived also.
","language":"English","publisher":"Society of Economic Geologists","doi":"10.2113/gsecongeo.80.8.2136","issn":"03610128","usgsCitation":"Doe, B.R., Delevaux, M., and Albers, J.P., 1985, The plumbotectonics of the West Shasta mining district, eastern Klamath Mountains, California: Economic Geology, v. 80, no. 8, p. 2136-2148, https://doi.org/10.2113/gsecongeo.80.8.2136.","productDescription":"13 p.","startPage":"2136","endPage":"2148","numberOfPages":"13","costCenters":[],"links":[{"id":220457,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"80","issue":"8","noUsgsAuthors":false,"publicationDate":"1985-12-01","publicationStatus":"PW","scienceBaseUri":"505baea1e4b08c986b324221","contributors":{"authors":[{"text":"Doe, B. R.","contributorId":52173,"corporation":false,"usgs":true,"family":"Doe","given":"B.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":365040,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Delevaux, M.H.","contributorId":27853,"corporation":false,"usgs":true,"family":"Delevaux","given":"M.H.","email":"","affiliations":[],"preferred":false,"id":365039,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Albers, J. P.","contributorId":81505,"corporation":false,"usgs":true,"family":"Albers","given":"J.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":365041,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70012997,"text":"70012997 - 1985 - Trondhjemite and metamorphosed quartz keratophyre tuff of the Ammonoosuc volcanics (Ordovician), western New Hampshire and adjacent Vermont and Massachusetts","interactions":[],"lastModifiedDate":"2023-12-28T21:52:19.969301","indexId":"70012997","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","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":"Trondhjemite and metamorphosed quartz keratophyre tuff of the Ammonoosuc volcanics (Ordovician), western New Hampshire and adjacent Vermont and Massachusetts","docAbstract":"The Ammonoosuc Volcanics and equivalent rocks of Ordovician age are exposed in the Oliverian domes along the Bronson Hill anti-clinorium (BHA) between northern New Hampshire and southern Connecticut. In western New Hampshire and adjacent Vermont and Massachusetts, the Ammonoosuc lithology consists of a lower, mainly mafic unit of homblende-plagioclase amphibolite, and an upper, mainly felsic, metamorphosed quartz keratophyre tuff. These lithologies are locally interlayered, and both are intruded by sills, dikes, and plugs of trondhjemite. Trondhjemite also constitutes the interior gneissic “core” of several small domes or plutons. The trondhjemite is highly siliceous (SiO2 = 73%–81%), low in A12O3 (11.3%–13.5%), generally contains < 1% K2O, and thus resembles some trondhjemites in island-arc or continental-margin settings. Chemical trends of both trondhjemite and Ammonoosuc Volcanics (felsic and mafic) are essentially calc-alkaline.
Variations in both major and trace elements of trondhjemites in several of the domes suggest several somewhat different sources along the BHA. Overall, however, the major- and minor-element chemistry of the trondhjemites is closely similar to that of the Ammonoosuc quartz keratophyre tuff. These rocks could have been produced either by partial melting or by fractional crystallization of basaltic source rocks. The partial-melting model is preferred because of the largely bimodal basalt-quartz keratophyre Ammonoosuc assemblage in which andesitic and other intermediate compositions are virtually lacking. The relatively thin Ammonoosuc section appears to preclude generation of trondhjemite at the presently exposed base of an island arc, as has been postulated for very similar trondhjemite-amphibolite assemblages (Twillingate trondhjemite, Little Port Complex) in Newfoundland. Instead, generation of the felsic Ammonoosuc rocks more likely occurred at deeper levels along a subduction zone dipping eastward under the BHA, as postulated in current plate-tectonic models. The close juxtaposition in space and time of sialic crust and Ammonoosuc Volcanics may explain the calc-alkaline trends of the latter and suggests a paleotectonic environment of convergent oceanic-continental plate margins, possibly with significant crustal shortening across the arc.
Subdividing thick sedimentary units into model layers based solely on stratigraphy can lead to serious violation of groundwater flow modeling restraints and produce erroneous results. Borehole geophysical data can be used to suggest relative permeabilities and delineate model layers that are more likely to have uniform hydraulic properties than layers delineated by stratigraphic definitions alone. The uniformity within layers emphasizes the permeability contrast between layers, thereby allowing a quasi three-dimensional approach. These methods are applied to the thick sedimentary units of the Gulf Coastal Plain, USA.
","language":"English","publisher":"National Groundwater Association","issn":"0017467X","usgsCitation":"Weiss, J.S., and Williamson, A.K., 1985, Subdivision of thick sedimentary units into layers for simulation of groundwater flow: Groundwater, v. 23, no. 6, p. 767-774.","productDescription":"8 p.","startPage":"767","endPage":"774","numberOfPages":"8","costCenters":[],"links":[{"id":220398,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9d0ce4b08c986b31d5f2","contributors":{"authors":[{"text":"Weiss, J. S.","contributorId":63414,"corporation":false,"usgs":true,"family":"Weiss","given":"J.","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":365028,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Williamson, A. K.","contributorId":57872,"corporation":false,"usgs":true,"family":"Williamson","given":"A.","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":365027,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70012992,"text":"70012992 - 1985 - Simulation of ground-water flow in southeastern Oahu, Hawaii","interactions":[],"lastModifiedDate":"2024-03-20T23:01:02.001701","indexId":"70012992","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3825,"text":"Groundwater","active":true,"publicationSubtype":{"id":10}},"title":"Simulation of ground-water flow in southeastern Oahu, Hawaii","docAbstract":"On the leeward side of southeastern Oahu, Hawaii, near-vertical dikes have intruded the gently dipping and highly permeable lava flows of the Koolau mountain. These dikes bound the study area on the north and west and internally divide it into the Waialae and Wailupe-Hawaii Kai aquifers. Recharge to these aquifers, 6 and 9 million gallons per day respectively, has created Ghyben-Herzberg lenses that freely float on sea water and discharge to the sea through coastal sediments. In the Waialae area, where rainfall is high and where thick (poorly permeable) coastal sediments inhibit the discharge of fresh water, heads are 8 to 15 feet above sea level. Lower rainfall and thin coastal sediments that allow easy discharge cause heads to be only 1 to 5 feet in the Wailupe-Hawaii Kai area.
The flow of ground water and the effects of future water development were simulated using AQUIFEM, a two-dimensional finite-element flow model, modified for aquifers containing a sea-water interface. The model provides accurate simulation of observed heads averaged over several years and predicts an additional area-wide head decline of about 1 foot when three recently drilled wells are put into production.
Our conceptual model of the Lassen system is termed a liquid-dominated hydrothermal system with a parasitic vapor-dominated zone. The essential feature of this model is that steam and steam-heated discharge at relatively high altitudes in Lassen Volcanic National Park (LVNP) and liquid discharge with high chloride concentrations at relatively low altitudes outside LVNP are both fed by an upflow of high-enthalpy two-phase fluid within the Park. Liquid flows laterally away from the upflow area toward the areas of high-chloride discharge, and steam rises through a vapor-dominated zone to feed the steam and steam-heated features. Numerical simulations show that several conditions are necessary for the development of this type of system, including (1) large-scale topographic relief; (2) an initial period of convective heating within an upflow zone followed by (3) a change in hydrologic or geologic conditions that initiates drainage of liquid from portions of the upflow zone; and (4) low-permeability barriers that inhibit the movement of cold water into the vapor zone. Simulations of thermal fluid withdrawal south of LVNP, carried out in order to determine the effects of such withdrawal on portions of the hydrothermal system within the Park, generally showed decreases in pressure and liquid saturation beneath the vapor zone which resulted in temporary increases and subsequent decreases in the rate of upflow of steam. A generalized production-injection scenario that could mitigate the effects of development on both the high-chloride and steam-fed features was identified.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/WR021i006p00853","usgsCitation":"Ingebritsen, S.E., and Sorey, M., 1985, A quantitative analysis of the Lassen hydrothermal system, north central California: Water Resources Research, v. 21, no. 6, p. 853-868, https://doi.org/10.1029/WR021i006p00853.","productDescription":"16 p.","startPage":"853","endPage":"868","costCenters":[],"links":[{"id":220341,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Lassen hydrothermal system","volume":"21","issue":"6","noUsgsAuthors":false,"publicationDate":"2008-01-08","publicationStatus":"PW","scienceBaseUri":"505a9071e4b0c8380cd7fd3f","contributors":{"authors":[{"text":"Ingebritsen, S. E.","contributorId":8078,"corporation":false,"usgs":true,"family":"Ingebritsen","given":"S.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":365018,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sorey, M.L.","contributorId":73185,"corporation":false,"usgs":true,"family":"Sorey","given":"M.L.","affiliations":[],"preferred":false,"id":365019,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70012984,"text":"70012984 - 1985 - Interpretation with a Donnan-based concept of the influence of simple salt concentration on the apparent binding of divalent ions to the polyelectrolytes polystyrenesulfonate and dextran sulfate","interactions":[],"lastModifiedDate":"2013-03-18T08:11:02","indexId":"70012984","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2423,"text":"Journal of Physical Chemistry","active":true,"publicationSubtype":{"id":10}},"title":"Interpretation with a Donnan-based concept of the influence of simple salt concentration on the apparent binding of divalent ions to the polyelectrolytes polystyrenesulfonate and dextran sulfate","docAbstract":"It has been shown that the apparent enhancement of divalent metal ion binding to polyions such as polystyrenesulfonate (PSS) and dextran sulfate (DS) by decreasing the ionic strength of these mixed counterion systems (M2+, M+, X-, polyion) can be anticipated with the Donnan-based model developed by one of us (J.A.M.). Ion-exchange distribution methods have been employed to measure the removal by the polyion of trace divalent metal ion from simple salt (NaClO4)-polyion (NaPSS) mixtures. These data and polyion interaction data published earlier by Mattai and Kwak for the mixed counterion systems MgCl2-LiCl-DS and MgCl2-CsCl-DS have been shown to be amenable to rather precise analysis by this model. ?? 1985 American Chemical Society.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Physical Chemistry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1021/j100270a036","issn":"00223654","usgsCitation":"Marinsky, J., Baldwin, R.F., and Reddy, M., 1985, Interpretation with a Donnan-based concept of the influence of simple salt concentration on the apparent binding of divalent ions to the polyelectrolytes polystyrenesulfonate and dextran sulfate: Journal of Physical Chemistry, v. 89, no. 24, p. 5303-5307, https://doi.org/10.1021/j100270a036.","startPage":"5303","endPage":"5307","numberOfPages":"5","costCenters":[],"links":[{"id":220282,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":269600,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1021/j100270a036"}],"volume":"89","issue":"24","noUsgsAuthors":false,"publicationDate":"2002-05-01","publicationStatus":"PW","scienceBaseUri":"505a3d89e4b0c8380cd63632","contributors":{"authors":[{"text":"Marinsky, J.A.","contributorId":42706,"corporation":false,"usgs":true,"family":"Marinsky","given":"J.A.","email":"","affiliations":[],"preferred":false,"id":365005,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Baldwin, Robert F.","contributorId":96415,"corporation":false,"usgs":true,"family":"Baldwin","given":"Robert","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":365006,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Reddy, M.M.","contributorId":24363,"corporation":false,"usgs":true,"family":"Reddy","given":"M.M.","email":"","affiliations":[],"preferred":false,"id":365004,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70012982,"text":"70012982 - 1985 - Thickness of ice on perennially frozen lakes","interactions":[],"lastModifiedDate":"2012-03-12T17:18:37","indexId":"70012982","displayToPublicDate":"1985-01-01T00:00:00","publicationYear":"1985","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2840,"text":"Nature","active":true,"publicationSubtype":{"id":10}},"title":"Thickness of ice on perennially frozen lakes","docAbstract":"The dry valleys of southern Victoria Land, constituting the largest ice-free expanse in the Antarctic, contain numerous lakes whose perennial ice cover is the cause of some unique physical and biological properties 1-3. Although the depth, temperature and salinity of the liquid water varies considerably from lake to lake, the thickness of the ice cover is remarkably consistent1, ranging from 3.5 to 6m, which is determined primarily by the balance between conduction of energy out of the ice and the release of latent heat at the ice-water interface and is also affected by the transmission and absorption of sunlight. In the steady state, the release of latent heat at the ice bottom is controlled by ablation from the ice surface. Here we present a simple energy-balance model, using the measured ablation rate of 30 cm yr-1, which can explain the observed ice thickness. ?? 1985 Nature Publishing Group.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Nature","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1038/313561a0","issn":"00280836","usgsCitation":"McKay, C., Clow, G., Wharton, R., and Squyres, S.W., 1985, Thickness of ice on perennially frozen lakes: Nature, v. 313, no. 6003, p. 561-562, https://doi.org/10.1038/313561a0.","startPage":"561","endPage":"562","numberOfPages":"2","costCenters":[],"links":[{"id":205017,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1038/313561a0"},{"id":220226,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"313","issue":"6003","noUsgsAuthors":false,"publicationDate":"1985-02-01","publicationStatus":"PW","scienceBaseUri":"505bb2a9e4b08c986b32593d","contributors":{"authors":[{"text":"McKay, C.P.","contributorId":41122,"corporation":false,"usgs":true,"family":"McKay","given":"C.P.","email":"","affiliations":[],"preferred":false,"id":364999,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Clow, G.D.","contributorId":46112,"corporation":false,"usgs":true,"family":"Clow","given":"G.D.","email":"","affiliations":[],"preferred":false,"id":365000,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wharton, R.A. Jr.","contributorId":56795,"corporation":false,"usgs":true,"family":"Wharton","given":"R.A.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":365001,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Squyres, S. W.","contributorId":31836,"corporation":false,"usgs":true,"family":"Squyres","given":"S.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":364998,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ]}