We have applied partial digestion procedures, primarily oxalic acid and aqua regia leaches, to several regional geochemical reconnaissance studies carried out using Inductively Coupled Plasma-Atomic Emission Spectroscopy (ICP-AES) analytical methods. We have chosen to use these two acids because the oxalic acid primarily attacks those compounds formed during secondary geochemical processes, whereas aqua regia will digest the primary sulfide phases as well as secondary phases. Application of the partial digestion technique has proven superior to total digestion because the concentration of metals in hydromorphic compounds and the sulfides is enhanced relative to the metals bound in the unattacked silicate phases. The aqua regia digestion attacks and leaches metals from the mafic chain silicates and the phyllosilicates (coordination number of VI or more), yielding a characteristic geochemical signature, but does not leach appreciable metal from many other silicates.
In order to interpret the results from these leach studies, we have initiated an investigation of a large suite of hand-picked mineral separates. The study includes analyses of about two hundred minerals representing the common rock-forming minerals as well as end-member compositions of various silicates, oxides, sulfides, carbonates, sulfates, and some vanadates, molybdates, tungstates, and phosphates. The objective of this study is to evaluate the effect of leaching by acids of particular lattice sites in specific mineral structures.
Experimental and field data are used to extend the utility of conodonts as semi-quantitative thermal indices into the regimes of regional and contact metamorphism, as well as hydrothermal alteration. An Arrhenius plot of data from induced conodont color alteration by pyrolysis in air at 1 atm was used to generate the geologic temperatures for conodont color-alteration indices (CAI) above 300 °C, that is, for CAI values of 5½ through 8. Such CAI values occur in very low- to medium-grade, regionally metamorphosed, contact-metamorphosed, and hydrothermally altered rocks. The uniformity or variability of CAI values within a sample, together with conodont texture, can help to distinguish grades and environments of metamorphism, particularly in metacarbonate sequences. Induced CAI by pyrolysis in a water-methane mixture at ½ kbar results in retardation of CAI and in a disparate mixture of both low and high CAI values within each experimental sample. In this system, color-alteration processes, above a CAI of 2 to 3, seem to change from predominantly carbonization to predominantly loss of organic matter, presumably by oxidation and volatilization of oxides. These experiments approximate the type of CAI mixture characteristically found in conodonts recovered from hydrothermally altered rocks. These data indicate that CAI values of 6 to 8 cannot be used to assess precise temperatures of hydrothermally altered rocks but may serve as useful indicators of potential mineralization.
","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1987)99<471:CCATAA>2.0.CO;2","usgsCitation":"Rejebian, V., Harris, A., and Huebner, J., 1987, Conodont color and textural alteration: An index to regional metamorphism, contact metamorphism, and hydrothermal alteration: Geological Society of America Bulletin, v. 99, no. 4, p. 471-479, https://doi.org/10.1130/0016-7606(1987)99<471:CCATAA>2.0.CO;2.","productDescription":"9 p.","startPage":"471","endPage":"479","numberOfPages":"9","costCenters":[],"links":[{"id":225565,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"99","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f9d1e4b0c8380cd4d7c8","contributors":{"authors":[{"text":"Rejebian, V.A.","contributorId":15352,"corporation":false,"usgs":true,"family":"Rejebian","given":"V.A.","email":"","affiliations":[],"preferred":false,"id":367969,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Harris, A. G.","contributorId":39791,"corporation":false,"usgs":true,"family":"Harris","given":"A. G.","affiliations":[],"preferred":false,"id":367970,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Huebner, J.S.","contributorId":41422,"corporation":false,"usgs":true,"family":"Huebner","given":"J.S.","email":"","affiliations":[],"preferred":false,"id":367971,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70014256,"text":"70014256 - 1987 - Pressure-composition relations for coexisting gases and liquids and the critical points in the system NaCl-H2O at 450, 475, and 500°C","interactions":[],"lastModifiedDate":"2015-06-02T12:31:14","indexId":"70014256","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","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":"Pressure-composition relations for coexisting gases and liquids and the critical points in the system NaCl-H2O at 450, 475, and 500°C","docAbstract":"Pressure-temperature-composition (P, T, x) relations for the co-existing vapor and liquid phases in the system NaCl-H2O were determined experimentally at 450, 475, and 500°C. Data for each isotherm includeP-x relations near the critical point and extend to the three-phase assemblage vapor-liquid-halite on the vapor side. On the liquid side the P-x data range from the critical point to the room-temperature halite saturation point (~25 wt.% NaCl). Critical pressures were calculated from measured pressures and compositions and classical theory. The results generally support the few data points of Urusova (1974, 1975) and Ölander and Liander (1950) but differ markedly from the extensive data of Sourirajan andKennedy (1962).
","language":"English","publisher":"Elsevier","doi":"10.1016/0016-7037(87)90289-4","issn":"00167037","usgsCitation":"Rosenbauer, R.J., and Bischoff, J.L., 1987, Pressure-composition relations for coexisting gases and liquids and the critical points in the system NaCl-H2O at 450, 475, and 500°C: Geochimica et Cosmochimica Acta, v. 51, no. 9, p. 2349-2354, https://doi.org/10.1016/0016-7037(87)90289-4.","productDescription":"6 p.","startPage":"2349","endPage":"2354","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":225500,"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":"505a8b5fe4b0c8380cd7e225","contributors":{"authors":[{"text":"Rosenbauer, Robert J. brosenbauer@usgs.gov","contributorId":204,"corporation":false,"usgs":true,"family":"Rosenbauer","given":"Robert","email":"brosenbauer@usgs.gov","middleInitial":"J.","affiliations":[{"id":520,"text":"Pacific Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":367952,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bischoff, James L. jbischoff@usgs.gov","contributorId":1389,"corporation":false,"usgs":true,"family":"Bischoff","given":"James","email":"jbischoff@usgs.gov","middleInitial":"L.","affiliations":[],"preferred":true,"id":367951,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70014250,"text":"70014250 - 1987 - Diagenesis and fluid flow in the San Juan Basin, New Mexico - regional zonation in the mineralogy and stable isotope composition of clay minerals in sandstone.","interactions":[],"lastModifiedDate":"2017-01-11T16:44:37","indexId":"70014250","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":732,"text":"American Journal of Science","active":true,"publicationSubtype":{"id":10}},"title":"Diagenesis and fluid flow in the San Juan Basin, New Mexico - regional zonation in the mineralogy and stable isotope composition of clay minerals in sandstone.","docAbstract":"The Westwater Canyon Member of the Upper Jurassic Morrison Formation is a relatively homogeneous, hydrologically continuous 100-m-thick sequence of massive fluvial sandstone, bounded above and below by relatively heterogeneous, hydrologically discontinuous units and has served as a primary conduit for fluids within this stratigraphic interval. Patterns of mineral-fluid reactions suggest a basinwide hydrologic regime in which warm, evolved fluids migrated up-dip from the center of the basin under the influence of a regional hydraulic head. -from Authors","language":"English","publisher":"American Journal of Science","doi":"10.2475/ajs.287.4.353","usgsCitation":"Whitney, C.G., and Northrop, H.R., 1987, Diagenesis and fluid flow in the San Juan Basin, New Mexico - regional zonation in the mineralogy and stable isotope composition of clay minerals in sandstone.: American Journal of Science, v. 287, no. 4, p. 353-382, https://doi.org/10.2475/ajs.287.4.353.","productDescription":"30 p.","startPage":"353","endPage":"382","numberOfPages":"30","costCenters":[],"links":[{"id":225433,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"287","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0093e4b0c8380cd4f7d0","contributors":{"authors":[{"text":"Whitney, C. Gene","contributorId":100350,"corporation":false,"usgs":true,"family":"Whitney","given":"C.","email":"","middleInitial":"Gene","affiliations":[],"preferred":false,"id":367939,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Northrop, H. R.","contributorId":40735,"corporation":false,"usgs":true,"family":"Northrop","given":"H.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":367940,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70014244,"text":"70014244 - 1987 - Slab pull and the seismotectonics of subducting lithosphere","interactions":[],"lastModifiedDate":"2017-01-03T16:28:55","indexId":"70014244","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3283,"text":"Reviews of Geophysics","active":true,"publicationSubtype":{"id":10}},"title":"Slab pull and the seismotectonics of subducting lithosphere","docAbstract":"This synthesis links many seismic and tectonic processes at subduction zones, including great subduction earthquakes, to the sinking of subducted plate. Earthquake data and tectonic modeling for subduction zones indicate that the slab pull force is much larger than the ridge push force. Interactions between the forces that drive and resist plate motions cause spatially and temporally localized stresses that lead to characteristic earthquake activity, providing details on how subduction occurs. Compression is localized across a locked interface thrust zone, because both the ridge push and the slab pull forces are resisted there. The slab pull force increases with increasing plate age; thus because the slab pull force tends to bend subducted plate downward and decrease the force acting normal to the interface thrust zone, the characteristic maximum earthquake at a given interface thrust zone is inversely related to the age of the subducted plate. The 1960 Chile earthquake (Mw 9.5), the largest earthquake to occur in historic times, began its rupture at an interface bounding oceanic plate <30 m.y. old. However, this rupture initiation was associated with the locally oldest subducting lithosphere (weakest coupling); the rupture propagated southward along an interface bounding progressively younger oceanic lithosphere, terminating near the subducting Chile Rise. Prior to a great subduction earthquake, the sinking subducted slab will cause increased tension at depths of 50–200 km, with greatest tension near the shallow zone resisting plate subduction. Plate sinking not only leads to compressional stresses at a locked interface thrust zone but may load compressional stresses at plate depths of 260–350 km, provided that the shallow sinking occurs faster than the relaxation time of the deeper mantle. This explains K. Mogi's observations of M ≥ 7 thrust earthquakes at depths of 260–350 km, immediately downdip and within 3 years prior to five great, shallow earthquakes of northern Japan. The slab pull model explains the lower layer of double seismic zones as due to tension from the deeper, sinking plate and the upper layer as due to localized in-plate compression, as plate motion is resisted by the bounding mantle. Just downdip of the interface thrust zone, there occurs an aseismic 20°–50° dip increase of subducted plate. This slab bend reflects the summed slab pull force of deeper plate and probably is at the crustal basalt to eclogite phase change. Resistance to subduction provided by a continually developing slab bend may be an important factor in the size of slab pull force delivered to an interface thrust zone.
","language":"English","publisher":"Wiley","doi":"10.1029/RG025i001p00055","issn":"87551209","usgsCitation":"Spence, W., 1987, Slab pull and the seismotectonics of subducting lithosphere: Reviews of Geophysics, v. 25, no. 1, p. 55-69, https://doi.org/10.1029/RG025i001p00055.","productDescription":"15 p.","startPage":"55","endPage":"69","costCenters":[],"links":[{"id":480092,"rank":1,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://zenodo.org/record/1231450","text":"External Repository"},{"id":225368,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"25","issue":"1","noUsgsAuthors":false,"publicationDate":"2010-06-14","publicationStatus":"PW","scienceBaseUri":"505b912de4b08c986b31979f","contributors":{"authors":[{"text":"Spence, William","contributorId":27454,"corporation":false,"usgs":true,"family":"Spence","given":"William","affiliations":[],"preferred":false,"id":367929,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70014240,"text":"70014240 - 1987 - Ecological aspects of microorganisms inhabiting uranium mill tailings","interactions":[],"lastModifiedDate":"2012-03-12T17:19:31","indexId":"70014240","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2729,"text":"Microbial Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Ecological aspects of microorganisms inhabiting uranium mill tailings","docAbstract":"Numbers and types of microorganisms in uranium mill tailings were determined using culturing techniques. Arthrobacter were found to be the predominant microorganism inhabiting the sandy tailings, whereas Bacillus and fungi predominated in the slime tailings. Sulfate-reducing bacteria, capable of leaching radium, were isolated in low numbers from tailings samples but were isolated in significantly high numbers from topsoil in contact with the tailings. The results are placed in the context of the magnitude of uranium mill tailings in the United States, the hazards posed by the tailings, and how such hazards could be enhanced or diminished by microbial activities. Patterns in the composition of the microbial population are evaluated with respect to the ecological variables that influence microbial growth. ?? 1987 Springer-Verlag New York Inc.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Microbial Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Springer-Verlag","doi":"10.1007/BF02013019","issn":"00953628","usgsCitation":"Miller, C., Landa, E.R., and Updegraff, D., 1987, Ecological aspects of microorganisms inhabiting uranium mill tailings: Microbial Ecology, v. 14, no. 2, p. 141-155, https://doi.org/10.1007/BF02013019.","startPage":"141","endPage":"155","numberOfPages":"15","costCenters":[],"links":[{"id":205618,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF02013019"},{"id":225303,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"14","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0545e4b0c8380cd50d21","contributors":{"authors":[{"text":"Miller, C.L.","contributorId":86788,"corporation":false,"usgs":true,"family":"Miller","given":"C.L.","email":"","affiliations":[],"preferred":false,"id":367921,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Landa, E. R.","contributorId":100002,"corporation":false,"usgs":true,"family":"Landa","given":"E.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":367922,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Updegraff, D.M.","contributorId":13251,"corporation":false,"usgs":true,"family":"Updegraff","given":"D.M.","email":"","affiliations":[],"preferred":false,"id":367920,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70014196,"text":"70014196 - 1987 - Basement thrust sheets in the Clearwater orogenic zone, central Idaho and western Montana","interactions":[],"lastModifiedDate":"2024-01-26T01:31:49.248548","indexId":"70014196","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"title":"Basement thrust sheets in the Clearwater orogenic zone, central Idaho and western Montana","docAbstract":"The Clearwater orogenic zone in central Idaho and western Montana contains at least two major northeast-directed Cordilleran thrust plates of Early Proterozoic metasedimentary and metaigneous rocks that overrode previously folded Middle Proterozoic rocks of the Belt basin in Cretaceous time. The northeastward migration of the resultant thickened wedge of crustal material combined with Cretaceous subduction along the western continental margin produced a younger northern Bitterroot lobe of the Idaho batholith relative to an older southern Atlanta lobe. Eocene extensional unroofing and erosion of the Bitterroot lobe has exposed the roots of the thick Cordilleran thrust sheets.
Seismic reflection and refraction data from the Coast Ranges of central California west of the San Andreas fault suggest the presence of a low-velocity (4.5–5.0 km/s) wedge at a depth of about 15–22 km that dips east beneath rocks of both the Franciscan assemblage and the Salinian block. We propose that the wedge represents sedimentary materials that were subducted in an offshore trench within the past 23 m.y. The refraction data also suggest the presence of a second low-velocity zone that extends at least to mid-crustal depths beneath the San Andreas fault zone.
Simple ground-water flow analyses can clarify complex empirical relations between rainfall and landslide motion. Here we present detailed data on rainfall, ground-water flow, and repetitive seasonal motion that occurred from 1982 to 1985 at Minor Creek landslide in northwestern California, and we interpret these data in the context of physically based theories. We find that landslide motion is closely regulated by the direction and magnitude of near-surface hydraulic gradients and by waves of pore pressure caused by intermittent rainfall.
Diffusive propagation of pore-pressure waves accompanies downward ground-water flow along nearly vertical hydraulic gradients that exist in most of the landslide. Field data combined with a pore-pressure diffusion analysis show that single rainstorms typically produce short-period waves that attenuate before reaching the landslide base. In contrast, seasonal rainfall cycles produce long-period waves that modify basal pore pressures, but only after time lags that range from weeks to months. Such tune lags can depend on antecedent moisture storage and can explain variable delays between the onset of the wet season and seasonal landslide motion.
Limit-equilibrium analysis shows that when seasonal pressure waves reach the landslide base, they establish a critical distribution of effective stress that delicately triggers landslide motion. The critical effective-stress balance is extremely sensitive to the direction and magnitude of hydraulic gradients.
Although pervasively downward gradients instigate seasonal motion, we infer from theory and limited data that ground water also may circulate locally in near-surface cells. The circulation can further reduce the landslide's frictional strength, particularly in areas of nearly horizontal ground-water flow that occur beneath steep faces of hummocks. Hummocky topography that results from slope instability may therefore cause ground-water flow that perpetuates instability.
Diffusive propagation of pore-pressure waves accompanies downward ground-water flow along nearly vertical hydraulic gradients that exist in most of the landslide. Field data combined with a pore-pressure diffusion analysis show that single rainstorms typically produce short-period waves that attenuate before reaching the landslide base. In contrast, seasonal rainfall cycles produce long-period waves that modify basal pore pressures, but only after time lags that range from weeks to months. Such tune lags can depend on antecedent moisture storage and can explain variable delays between the onset of the wet season and seasonal landslide motion.
Limit-equilibrium analysis shows that when seasonal pressure waves reach the landslide base, they establish a critical distribution of effective stress that delicately triggers landslide motion. The critical effective-stress balance is extremely sensitive to the direction and magnitude of hydraulic gradients.
Although pervasively downward gradients instigate seasonal motion, we infer from theory and limited data that ground water also may circulate locally in near-surface cells. The circulation can further reduce the landslide's frictional strength, particularly in areas of nearly horizontal ground-water flow that occur beneath steep faces of hummocks. Hummocky topography that results from slope instability may therefore cause ground-water flow that perpetuates instability.
","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1987)99%3C579:RGFASM%3E2.0.CO;2","usgsCitation":"Iverson, R., and Major, J., 1987, Rainfall, ground-water flow, and seasonal movement at Minor Creek landslide, northwestern California: Physical interpretation of empirical relations: Geological Society of America Bulletin, v. 99, no. 4, p. 579-594, https://doi.org/10.1130/0016-7606(1987)99%3C579:RGFASM%3E2.0.CO;2.","productDescription":"16 p.","startPage":"579","endPage":"594","numberOfPages":"16","costCenters":[{"id":157,"text":"Cascades Volcano Observatory","active":false,"usgs":true}],"links":[{"id":225299,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Minor Creek landslide","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -123.87496948242186,\n 40.90793419432049\n ],\n [\n -123.72270584106445,\n 40.90793419432049\n ],\n [\n -123.72270584106445,\n 41.010345626044106\n ],\n [\n -123.87496948242186,\n 41.010345626044106\n ],\n [\n -123.87496948242186,\n 40.90793419432049\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"99","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a946ee4b0c8380cd813dd","contributors":{"authors":[{"text":"Iverson, R.M. 0000-0002-7369-3819","orcid":"https://orcid.org/0000-0002-7369-3819","contributorId":16435,"corporation":false,"usgs":true,"family":"Iverson","given":"R.M.","affiliations":[],"preferred":false,"id":367768,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Major, J. J. 0000-0003-2449-4466","orcid":"https://orcid.org/0000-0003-2449-4466","contributorId":29461,"corporation":false,"usgs":true,"family":"Major","given":"J. J.","affiliations":[{"id":157,"text":"Cascades Volcano Observatory","active":false,"usgs":true}],"preferred":true,"id":367769,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70014165,"text":"70014165 - 1987 - Response of douglas fir (Pseudotsuga menziesii) to uraniferous groundwater in a small glaciated drainage, Northeastern Washington State","interactions":[],"lastModifiedDate":"2024-04-17T23:57:39.126705","indexId":"70014165","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","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":"Response of douglas fir (Pseudotsuga menziesii) to uraniferous groundwater in a small glaciated drainage, Northeastern Washington State","docAbstract":"Douglas fir trees and associated soils were sampled from the slopes of a small (∼4 km2) drainage basin in northeastern Washington to investigate the biogeochemical response to locally uraniferous groundwater. Uranium is preferentially incorporated in needles and twigs compared to larger branches or the trunk. The U concentration in needle ash ranges from 0.2 to 5.8μg g−1 (ppm) and shows no correlation with the U concentration in associated soils. Rather, the distribution of anomalously uraniferous douglas fir (> 1.0μg g−1 U in needle ash) appears to be controlled by observed or readily inferred pathways of near-surface groundwater movement in the drainage. These pathways include: (1) general downslope movement of subsurface runoff; (2) increased flux of near-surface groundwater near the toe of an alluvial fan; and (3) emergence of uraniferous (100–150 ng ml−1 [ppb] groundwater in the vicinity of a slope spring. The data also indicate the presence of near-surface uraniferous groundwater along a structurally controlled zone that parallels the north-south strike of the valley, and that includes the slope spring. The results suggest that biogeochemical sampling may be used to supplement more direct, but more limited, measurements of groundwater quality and flow regime in areas of near-surface contaminated groundwater.
This article describes the use of kriging for optimizing data collection and utility in a regional ground-water investigation of the Potomac-Raritan-Magothy aquifer system in central New Jersey. Kriging was used to (1) estimate the altitude of an aquifer surface, (2) estimate hydraulic conductivities from point data, and (3) estimate the associated kriged errors. The selection of locations for additional data collection, based on the kriged errors, was effective in terms of improving the aquifer surface data base. In another application, hydraulic conductivity values were kriged, first using equal weights, then unequal weights to account for the reliability of the data. The weighting values that were used for unequal weighting were estimated by an analysis of variance. Although inclusion of the data reliability in the kriging will increase the kriged errors, the accuracy of the range of uncertainty in the interpolated values also increases.
The diffusion model of degradation of topographic features is a promising means by which vertical offsets on Holocene faults might be dated. In order to calibrate the method, we have examined present-day profiles of wave-cut shoreline scarps of late Pleistocene lakes Bonneville and Lahontan. It may be assumed that these scarps were initially at least as steep as the angle of repose. Offsets range from 1 to 12 m, and present slope angles range from 9° to 29°. A parameter called apparent diffusion age, defined as half the mean square horizontal extent of the slope function of each profile, is plotted as a function of scarp offset. The points show a clear trend of apparent age increasing nearly linearly with offset. If linear diffusion held and scarps were initially vertical, apparent diffusion age would be the same for all the shoreline profiles. The increasing trend can only partly be explained by nonvertical initial scarp slope, and therefore the rate of transport of material downslope must increase significantly faster than a linear law in the range of slopes spanned by the data. The transport law must become linear at small slope to reduce scatter between profiles with varying ambient slopes. The transport law adopted for the purpose of dating is k0(1 + 5s2), where s is local slope. The transport coefficient k0 is correlated inversely with fan slope, suggesting that there is a dependence on the particle size distribution. A table is included that allows easy application of the model to scarps with simple initial shape.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB092iB12p12857","issn":"01480227","usgsCitation":"Andrews, D., and Bucknam, R.C., 1987, Fitting degradation of shoreline scarps by a nonlinear diffusion model: Journal of Geophysical Research Solid Earth, v. 92, no. B12, p. 12857-12867, https://doi.org/10.1029/JB092iB12p12857.","productDescription":"11 p.","startPage":"12857","endPage":"12867","numberOfPages":"11","costCenters":[],"links":[{"id":225596,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"92","issue":"B12","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"505a10c7e4b0c8380cd53dda","contributors":{"authors":[{"text":"Andrews, D.J.","contributorId":7416,"corporation":false,"usgs":true,"family":"Andrews","given":"D.J.","email":"","affiliations":[],"preferred":false,"id":369270,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bucknam, Robert C.","contributorId":104490,"corporation":false,"usgs":true,"family":"Bucknam","given":"Robert","email":"","middleInitial":"C.","affiliations":[{"id":595,"text":"U.S. Geological Survey","active":false,"usgs":true}],"preferred":false,"id":369271,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70014146,"text":"70014146 - 1987 - Analysis of Shuttle Multispecral Infrared Radiometer measurements of the western Saudi Arabian shield.","interactions":[],"lastModifiedDate":"2017-08-30T08:20:14","indexId":"70014146","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1808,"text":"Geophysics","active":true,"publicationSubtype":{"id":10}},"title":"Analysis of Shuttle Multispecral Infrared Radiometer measurements of the western Saudi Arabian shield.","docAbstract":"This paper describes conceptual and mathematical modeling approaches to evaluate environmentally suitable waste management practices that prevent ground water pollution from landfill disposal of solid wastes contaminated with organic solvents. Threshold values for disposal of solid wastes contaminated with acetone, nitrobenzene, chlorobenzene, and carbon tetrachloride were estimated using a disposal site model using a two-dimensional advection-,dispersion solute transport computer code. For example, the threshold value for disposal of carbon tetrachloride at the site model was approximately 600 g/acre, while the value for acetone was limited only by the characteristics of the waste to prevent free drainage of liquid solvent. The study indicated that the toxicity, mass loading rate, and the mass of solvent initially disposed are critical parameters determining the relative success of a given site to attenuate contaminants to environmentally acceptable levels.
","language":"English","publisher":"Elsevier","doi":"10.1016/0304-3894(87)85035-5","issn":"03043894","usgsCitation":"Roy, W.R., and Griffin, R.A., 1987, Estimating threshold values for the land disposal of organic solvent-contaminated wastes: Journal of Hazardous Materials, v. 15, no. 3, p. 365-376, https://doi.org/10.1016/0304-3894(87)85035-5.","productDescription":"12 p.","startPage":"365","endPage":"376","numberOfPages":"12","costCenters":[],"links":[{"id":225425,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"15","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0b66e4b0c8380cd526e1","contributors":{"authors":[{"text":"Roy, William R.","contributorId":45454,"corporation":false,"usgs":true,"family":"Roy","given":"William","middleInitial":"R.","affiliations":[],"preferred":false,"id":367642,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Griffin, R. A.","contributorId":46211,"corporation":false,"usgs":true,"family":"Griffin","given":"R.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":367643,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70014121,"text":"70014121 - 1987 - The crustal structure of the axis of the Great Valley, California, from seismic refraction measurements","interactions":[],"lastModifiedDate":"2020-05-07T15:30:26.756139","indexId":"70014121","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3525,"text":"Tectonophysics","active":true,"publicationSubtype":{"id":10}},"title":"The crustal structure of the axis of the Great Valley, California, from seismic refraction measurements","docAbstract":"In 1982 the U.S. Geological Survey collected six seismic refraction profiles in the Great Valley of California: three axial profiles with a maximum shot-to-receiver offset of 160 km, and three shorter profiles perpendicular to the valley axis. This paper presents the results of two-dimensional raytracing and synthetic seismogram modeling of the central axial profile. The crust of the central Great Valley is laterally heterogeneous along its axis, but generally consists of a sedimentary section overlying distinct upper, middle, and lower crustal units. The sedimentary rocks are 3-5 km thick along the profile, with velocities increasing with depth from 1.6 to 4.0 km/s. The basement (upper crust) consists of four units: 1. (1) a 1.0-1.5 km thick layer of velocity 5.4-5.8 km/s, 2. (2) a 3-4 km thick layer of velocity 6.0-6.3 km/s, 3. (3) a 1.5-3.0 km thick layer of velocity 6.5-6.6 km/s, and 4. (4) a laterally discontinuous, 1.5 km thick layer of velocity 6.8-7.0 km/s. The mid-crust lies at 11-14 km depth, is 5-8 km thick, and has a velocity of 6.6-6.7 km/s. On the northwest side of our profile the mid-crust is a low-velocity zone beneath the 6.8-7.0 km/s lid. The lower crust lies at 16-19 km depth, is 7-13 km thick, and has a velocity of 6.9-7.2 km/s. Crustal thickness increases from 26 to 29 km from NW to SE in the model. Although an unequivocal determination of crustal composition is not possible from P-wave velocities alone, our model has several geological and tectonic implications. We interpret the upper 7 km of basement on the northwest side of the profile as an ophiolitic fragment, since its thickness and velocity structure are consistent with that of oceanic crust. This fragment, which is not present 10-15 km to the west of the refraction profile, is probably at least partially responsible for the Great Valley gravity and magnetic anomalies, whose peaks lie about 10 km east of our profile. The middle and lower crust are probably gabbroic and the product of magmatic or tectonic underplating, or both. The crustal structure of the Great Valley is dissimilar to that of the adjacent Diablo Range, suggesting the existence of a fault or suture zone throughout the crust between these provinces.
","largerWorkTitle":"","language":"English","publisher":"Elsevier","doi":"10.1016/0040-1951(87)90139-9","issn":"00401951","usgsCitation":"Holbrook, W., and Mooney, W.D., 1987, The crustal structure of the axis of the Great Valley, California, from seismic refraction measurements: Tectonophysics, v. 140, no. 1, p. 49-63, https://doi.org/10.1016/0040-1951(87)90139-9.","productDescription":"15 p.","startPage":"49","endPage":"63","numberOfPages":"15","costCenters":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":480089,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1016/0040-1951(87)90139-9","text":"Publisher Index Page"},{"id":225424,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United 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\"}}]}","volume":"140","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505baa71e4b08c986b322835","contributors":{"authors":[{"text":"Holbrook, W.S.","contributorId":84916,"corporation":false,"usgs":true,"family":"Holbrook","given":"W.S.","affiliations":[],"preferred":false,"id":367641,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mooney, Walter D. 0000-0002-5310-3631 mooney@usgs.gov","orcid":"https://orcid.org/0000-0002-5310-3631","contributorId":3194,"corporation":false,"usgs":true,"family":"Mooney","given":"Walter","email":"mooney@usgs.gov","middleInitial":"D.","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":367640,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":1013596,"text":"1013596 - 1987 - Interactions among dietary minerals, arginine and lysine in rainbow trout (Salmo gairdneri)","interactions":[],"lastModifiedDate":"2023-10-30T15:55:02.97544","indexId":"1013596","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1651,"text":"Fish Physiology and Biochemistry","active":true,"publicationSubtype":{"id":10}},"displayTitle":"Interactions among dietary minerals, arginine and lysine in rainbow trout (Salmo gairdneri)","title":"Interactions among dietary minerals, arginine and lysine in rainbow trout (Salmo gairdneri)","docAbstract":"Studies were conducted to determine whether interactions occur among dietary lysine, arginine and monovalent minerals in rainbow trout. In one experiment, rainbow trout fingerlings were fed diets containing three levels of lysine (2.4, 3.1 and 3.8 g per 100 g diet), two levels of arginine (1.7 and 2.5 g per 100 g diet) and two mixtures of Na+ K+ and Cl in a 3×2×2 factorial design. The mixtures varied in the proportions of cations to anions such that Cl equalled the sum of Na+ and K+ (cations − anions = 0 mEq/kg diet) in one mixture and exceeded the sum of Na+ and K+ (cations − anions = −200 mEq/kg diet) in the second mixture. Growth and efficiency of feed conversion were not affected by dietary lysine and arginine in fish fed diets containing − 200 mEq/kg balance, but when fish were fed diets containing a 0 mEq/kg balance, 3.8% lysine and a combination of 3.1% lysine and 2.5% arginine depressed both measures of response. Trout receiving the 0 mEq/kg cation-anion balance had significantly higher free histidine concentrations and lower free lysine concentrations in muscle and higher hepatic arginase activity (P≤0.01) than those receiving −200 mEq/kg. In another experiment, trout were fed diets containing three levels of K+ (21, 191 and 360 mEq/kg), two levels of Na+ (21 and 191 mEq/kg) and two levels of Cl− (179 and 347 mEq/kg) in a 3×2×2 factorial design. Growth and efficiency of feed conversion were depressed and hepatosomatic index increased with higher levels of dietary K+ (P≤0.01), Na+ (P≤0.05) and Cl (P≤0.01), with significant K+ x Cl+ (P≤0.01) and K+ x Na+ x Cl (P≤0.05) interactions. Increasing dietary K+ resulted in increased levels of muscle free histidine and decreased levels of muscle free lysine and arginine (P≤0.01), while increasing dietary Cl increased muscle free lysine, the effect of which was dependent on dietary potassium (K+ x Cl−, P≤0.01). It is concluded that dietary levels of K+, Na+ and Cl−, irrespective of overall cation-anion balance of these minerals, affects growth rate, efficiency of feed utilization and the metabolism of basic amino acids in tissues of trout. Excess lysine causes depressed growth and efficiency of feed utilization. These effects were due to a lysine toxicity rather than a lysine-arginine antagonism, as they were not prevented by supplemental dietary arginine.
","language":"English","publisher":"Springer Link","doi":"10.1007/BF02073865","usgsCitation":"Chiu, Y.N., Austic, R.E., and Rumsey, G.L., 1987, Interactions among dietary minerals, arginine and lysine in rainbow trout (Salmo gairdneri): Fish Physiology and Biochemistry, v. 4, no. 1, p. 45-55, https://doi.org/10.1007/BF02073865.","productDescription":"11 p.","startPage":"45","endPage":"55","numberOfPages":"11","costCenters":[{"id":365,"text":"Leetown Science Center","active":true,"usgs":true}],"links":[{"id":131192,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"4","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49dbe4b07f02db5e0d95","contributors":{"authors":[{"text":"Chiu, Y. N.","contributorId":84306,"corporation":false,"usgs":false,"family":"Chiu","given":"Y.","email":"","middleInitial":"N.","affiliations":[],"preferred":false,"id":318817,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Austic, R. E.","contributorId":42558,"corporation":false,"usgs":false,"family":"Austic","given":"R.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":318815,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Rumsey, G. L.","contributorId":80604,"corporation":false,"usgs":true,"family":"Rumsey","given":"G.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":318816,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70014116,"text":"70014116 - 1987 - Modes of development of slope canyons and their relation to channel and levee features on the Ebro sediment apron, off-shore northeastern Spain","interactions":[],"lastModifiedDate":"2013-03-01T15:30:27","indexId":"70014116","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2682,"text":"Marine and Petroleum Geology","active":true,"publicationSubtype":{"id":10}},"title":"Modes of development of slope canyons and their relation to channel and levee features on the Ebro sediment apron, off-shore northeastern Spain","docAbstract":"Six submarine slope canyons in an area of the northwestern Mediterranean, offshore from the Ebro River and Delta, were surveyed with bathymetric swathmapping (SeaBeam) and mid-range side-looking sonar (SeaMARC I). All of the canyons have slightly winding paths with concave-upwards gradients that are relatively steep shallower than 1,200 m. Two major types of canyons are identified on the basis of their morphologic character at the base of the slope; Type-I canyons lead to an unchannelled base-of-slope deposit and Type-II canyons are continuous with channel-levee systems that cross the rise. Four Type-I canyons were surveyed in the area. Two of these are broad, U-shaped, steep (average gradients of 1:14), do not indent the shelf, and terminate downslope at debris-flow deposits. These two canyons, the most northern in the area, have rounded heads with extensive gullies separated by knife-edge ridges. Relief of the canyon walls is about equal on both sides of the canyons, although the right-hand walls (looking downslope) are generally steeper. The other two Type-I canyons in the area are similar in that they do not indent the shelf, but they are much smaller and shallower and coalesce before terminating in the base-of-slope region. The two Type-II canyons that feed leveed-channels are U-shaped with flatter floors, longer profiles and gentler gradients than Type-I canyons. They are closer to the Valencia Valley and have relatively small cross-sectional areas. We propose a four-stage evolutionary sequence to explain the development of the canyons observed in this section on the prograding Ebro margin. During the initial stage, slumping and erosion on the slope creates a network of small gullies. During the next stage, headward growth of one (or more) gully leads to a major indentation of the shelf. This is the critical factor for developing a channel that will incise the slope and provide a major conduit for moving sediment to the basin. Stage 3 is characterized by the development of a continuous channel accompanied by levee growth across the lobe. In the final stage, the channel-levee system becomes inactive either through destruction by mass wasting, infilling of the channel, or loss of the major sediment source. ?? 1987.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Marine and Petroleum Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/0264-8172(87)90009-2","issn":"02648172","usgsCitation":"O'Connell, S., Ryan, W., and Normark, W.R., 1987, Modes of development of slope canyons and their relation to channel and levee features on the Ebro sediment apron, off-shore northeastern Spain: Marine and Petroleum Geology, v. 4, no. 4, Pages 308, IN1–IN2, 309–319, https://doi.org/10.1016/0264-8172(87)90009-2.","productDescription":"Pages 308, IN1–IN2, 309–319","costCenters":[],"links":[{"id":268654,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/0264-8172(87)90009-2"},{"id":225295,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"4","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5ca6e4b0c8380cd6fe5b","contributors":{"authors":[{"text":"O'Connell, S.","contributorId":37060,"corporation":false,"usgs":true,"family":"O'Connell","given":"S.","affiliations":[],"preferred":false,"id":367628,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ryan, William B. F.","contributorId":86486,"corporation":false,"usgs":false,"family":"Ryan","given":"William B. F.","affiliations":[{"id":7135,"text":"Lamont Doherty Earth Observatory, Columbia University, Palisades, NY","active":true,"usgs":false}],"preferred":false,"id":367629,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Normark, W. R.","contributorId":87137,"corporation":false,"usgs":true,"family":"Normark","given":"W.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":367630,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70014112,"text":"70014112 - 1987 - The mobilization of aluminum in a natural soil system: Effects of hydrologic pathways","interactions":[],"lastModifiedDate":"2018-02-21T11:09:22","indexId":"70014112","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","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":"The mobilization of aluminum in a natural soil system: Effects of hydrologic pathways","docAbstract":"A two-component soil water flow model was used in conjunction with an equilibrium speciation model WATEQF to study aluminum mobility in soils of a forested watershed, White Oak Run, in the Shenandoah National Park, Virginia. Soil solution samples, taken from the O, E, B, C1, and C2horizons, were collected from zero-tension lysimeters designed to collect faster gravitational macropore flow and tension lysimeters designed to collect slower capillary micropore flow. Dissolved aluminum was fractionated into acid-soluble, inorganic monomeric, and organic monomeric aluminum. Soil water aluminum concentrations decreased with depth indicating that the deep soil is a sink for aluminum. All waters contained significant concentrations of acid-soluble aluminum and exhibited a negative correlation between pH and the inorganic monomeric aluminum concentrations. Water in the shallow soil showed distinctly different chemical compositions for the two flow types, while C horizon micropore and macropore waters were more similar. Because of its shorter residence time, water flowing in deep soil macropores underwent less extensive neutralization and immobilization of aqueous aluminum than micropore water. The O horizon macropore waters were undersaturated for all hydroxide, silicate, and sulfate mineral phases considered. The C horizon samples from both flow types were near equilibrium with respect to kaolinite and synthetic gibbsite, indicating that mineral solubility controls water chemistry in the deep soil, while organic substances are the key control in the shallow macropore waters.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/WR023i005p00859","usgsCitation":"Cozzarelli, I.M., Herman, J.S., and Parnell, R.A., 1987, The mobilization of aluminum in a natural soil system: Effects of hydrologic pathways: Water Resources Research, v. 23, no. 5, p. 859-874, https://doi.org/10.1029/WR023i005p00859.","productDescription":"16 p.","startPage":"859","endPage":"874","costCenters":[],"links":[{"id":226204,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"5","noUsgsAuthors":false,"publicationDate":"2010-07-09","publicationStatus":"PW","scienceBaseUri":"505baddee4b08c986b323e32","contributors":{"authors":[{"text":"Cozzarelli, Isabelle M. 0000-0002-5123-1007 icozzare@usgs.gov","orcid":"https://orcid.org/0000-0002-5123-1007","contributorId":1693,"corporation":false,"usgs":true,"family":"Cozzarelli","given":"Isabelle","email":"icozzare@usgs.gov","middleInitial":"M.","affiliations":[{"id":49175,"text":"Geology, Energy & Minerals Science Center","active":true,"usgs":true},{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":true,"id":367609,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Herman, Janet S.","contributorId":62138,"corporation":false,"usgs":true,"family":"Herman","given":"Janet","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":367610,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Parnell, Roderic A. Jr.","contributorId":108259,"corporation":false,"usgs":true,"family":"Parnell","given":"Roderic","suffix":"Jr.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":367611,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70014108,"text":"70014108 - 1987 - Isotopic composition of pyrite: Relationship to organic matter type and iron availability in some North American cretaceous shales","interactions":[],"lastModifiedDate":"2023-11-17T01:04:56.721853","indexId":"70014108","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1214,"text":"Chemical Geology: Isotope Geoscience Section","active":true,"publicationSubtype":{"id":10}},"title":"Isotopic composition of pyrite: Relationship to organic matter type and iron availability in some North American cretaceous shales","docAbstract":"The S isotope composition of pyrite in Cretaceous shales from the Western Interior of North America is related to organic C abundance, kerogen type and Fe availability. Both calcareous and noncalcareous rocks show a correlation between S and C, but noncalcareous rocks are relatively enriched in S with a higher S/C ratio. This higher ratio probably shows that pyrite formation was Fe limited in the calcareous rocks. Organic-carbon-rich noncalcareous shales accumulated slowly beneath anoxic bottom waters. The anoxic bottom waters allowed hydrogen-rich organic matter to be preserved. Such shales have a narrow range of 34S-depleted sulfide and have Fe/S ratios like stoichiometric pyrite, suggesting that pyrite formation in organic-rich shales was also limited by Fe availability. Conversely, organic-poor shales commonly accumulated at comparatively high rates, contain hydrogen-poor and refractory organic matter, and have a wide range of pyrite-S isotopic compositions. These organic-poor shales contain post-sulfidic authigenic minerals such as siderite and have excess reactive Fe rather than pyrite stoichiometry. Evidently Fe played a large role in early diagenesis and determined the course of post-sulfidic diagenesis. Fe availability was, however, mainly controlled by provenance, by the rates of sediment accumulation, and by the oxygen content of the depositional environment.
A methodology has been developed to create a spatial database by referencing digital elevation, Landsat multispectral scanner data, and digitized soil premap delineations of a number of adjacent 7.5-min quadrangle areas to a 30-m Universal Transverse Mercator projection. Slope and aspect transformations are calculated from elevation data and grouped according to field office specifications. An unsupervised classification is performed on a brightness and greenness transformation of the spectral data. The resulting spectral, slope, and aspect maps of each of the 7.5-min quadrangle areas are then plotted and submitted to the field office to be incorporated into the soil premapping stages of a soil survey. A tabular database is created from spatial data by generating descriptive statistics for each data layer within each soil premap delineation. The tabular data base is then entered into a data base management system to be accessed by the field office personnel during the soil survey and to be used for subsequent resource management decisions.
Large amounts of data are collected and archived during resource inventories for public land management. Often these data are stored as stacks of maps or folders in a file system in someone's office, with the maps in a variety of formats, scales, and with various standards of accuracy depending on their purpose. This system of information storage and retrieval is cumbersome at best when several categories of information are needed simultaneously for analysis or as input to resource management models. Computers now provide the resource scientist with the opportunity to design increasingly complex models that require even more categories of resource-related information, thus compounding the problem.
Recently there has been much emphasis on the use of geographic information systems (GIS) as an alternative method for map data archives and as a resource management tool. Considerable effort has been devoted to the generation of tabular databases, such as the U.S. Department of Agriculture's SCS/S015 (Soil Survey Staff, 1983), to archive the large amounts of information that are collected in conjunction with mapping of natural resources in an easily retrievable manner.
During the past 4 years the U.S. Geological Survey's EROS Data Center, in a cooperative effort with the Bureau of Land Management (BLM) and the Soil Conservation Service (SCS), developed a procedure that uses spatial and tabular databases to generate elevation, slope, aspect, and spectral map products that can be used during soil premapping. The procedure results in tabular data, residing in a database management system, that are indexed to the final soil delineations and help quantify soil map unit composition.
The procedure was developed and tested on soil surveys on over 600 000 ha in Wyoming, Nevada, and Idaho. A transfer of technology from the EROS Data Center to the BLM will enable the Denver BLM Service Center to use this procedure in soil survey operations on BLM lands. Also underway is a cooperative effort between the EROS Data Center and SCS to define and evaluate maps that can be produced as derivatives of digital elevation data for 7.5-min quadrangle areas, such as those used during the premapping stage of the soil surveys mentioned above, the idea being to make such products routinely available.
The procedure emphasizes the applications of digital elevation and spectral data to order-three soil surveys on rangelands, and will:
Incorporate digital terrain and spectral data into a spatial database for soil surveys.
Provide hardcopy products (that can be generated from digital elevation model and spectral data) that are useful during the soil pre-mapping process.
Incorporate soil premaps into a spatial database that can be accessed during the soil survey process along with terrain and spectral data.
Summarize useful quantitative information for soil mapping and for making interpretations for resource management.
No abstract available
","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"The Latest on the Best, Essays on Evolution and Optimality","language":"English","publisher":"MIT Press","publisherLocation":"Cambridge, MA","usgsCitation":"Emlen, J., 1987, Evolutionary ecology and the optimality assumption, chap. of The Latest on the Best, Essays on Evolution and Optimality, p. 163-177.","productDescription":"15 p. ","startPage":"163","endPage":"177","costCenters":[{"id":654,"text":"Western Fisheries Research Center","active":true,"usgs":true}],"links":[{"id":334672,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5895a4d5e4b0fa1e59bc1ebc","contributors":{"authors":[{"text":"Emlen, J.M.","contributorId":63979,"corporation":false,"usgs":true,"family":"Emlen","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":662453,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70180805,"text":"70180805 - 1987 - Life history and ecology requirements of the Moapa dace (Moapa coracea)","interactions":[],"lastModifiedDate":"2017-02-03T13:04:06","indexId":"70180805","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":1,"text":"Federal Government Series"},"title":"Life history and ecology requirements of the Moapa dace (Moapa coracea)","docAbstract":"No abstract available
","language":"English","publisher":"U.S. Fish and Wildlife Service","usgsCitation":"Scoppettone, G., 1987, Life history and ecology requirements of the Moapa dace (Moapa coracea).","costCenters":[{"id":654,"text":"Western Fisheries Research Center","active":true,"usgs":true}],"links":[{"id":334680,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5895a4d5e4b0fa1e59bc1eae","contributors":{"authors":[{"text":"Scoppettone, G.G.","contributorId":22793,"corporation":false,"usgs":true,"family":"Scoppettone","given":"G.G.","email":"","affiliations":[],"preferred":false,"id":662474,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70015171,"text":"70015171 - 1987 - Localized sudden changes in the geomagnetic secular variation.","interactions":[],"lastModifiedDate":"2024-04-25T00:07:25.013254","indexId":"70015171","displayToPublicDate":"1987-01-01T00:00:00","publicationYear":"1987","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2310,"text":"Journal of Geomagnetism & Geoelectricity","active":true,"publicationSubtype":{"id":10}},"title":"Localized sudden changes in the geomagnetic secular variation.","docAbstract":"There is much debate as to whether there was a worldwide geomagnetic jerk in 1969 or 1970. It is agreed that there was an unusual sharp change in the secular variation in the east component, Y, in Europe at that time. This note points out how a localized sudden change in the secular variation pattern of one component in Europe can occur without having any large worldwide effects in any of the components. The accompanying changes in the spherical harmonic coefficients for such a localized change are also discussed.
","language":"English","publisher":"J-STAGE","doi":"10.5636/jgg.39.111","usgsCitation":"Alldredge, L., 1987, Localized sudden changes in the geomagnetic secular variation.: Journal of Geomagnetism & Geoelectricity, v. 39, no. 2, p. 111-118, https://doi.org/10.5636/jgg.39.111.","productDescription":"8 p.","startPage":"111","endPage":"118","numberOfPages":"8","costCenters":[],"links":[{"id":487261,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.5636/jgg.39.111","text":"Publisher Index Page"},{"id":224077,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"39","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a48f4e4b0c8380cd6826a","contributors":{"authors":[{"text":"Alldredge, L.R.","contributorId":53457,"corporation":false,"usgs":true,"family":"Alldredge","given":"L.R.","email":"","affiliations":[],"preferred":false,"id":370244,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ]}