As part of the Joint Oceanographic Institutions Deep Earth Sampling project, the interstitial waters of cores from 69 holes were sampled for deuterium analysis. Sixteen of the cores penetrated sediments as old as Eocene, and several sampled Cretaceous sediments, which allowed us to examine changes in the deuterium content of the oceans with time. Deuterium is shown to be a conservative constituent of the pore water. Its abundance in the pore fluids can be changed by diffusion, but the rate is slow, and corrections for this effect have been made. Changes in the abundance of deuterium can be related to changes in the amount of ice stored in continental glaciers, inasmuch as precipitation in the form of snow is highly depleted in deuterium compared with the oceans. Many of the cores show a change in isotopic composition of samples from early to late Miocene that can be ascribed to the buildup of the Antarctic ice sheets. After correcting for the role of diffusion in reducing the isotopic contrast between samples from a single core, we estimate an increase of 10 per mil (‰) δD (corresponding to a° δ18O change of about 1.2‰) between the early and late Miocene. A similiar analysis of Pleistocene to Holocene changes indicates a δD rise of 8‰ during the time of maximum continental ice, which corresponds to a δ18O increase of about 1.0‰. On the basis of limited data, we find no δD change in the oceans from Cretaceous to Miocene.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JC093iC07p08249","issn":"01480227","usgsCitation":"Friedman, I., and Hardcastle, K., 1988, Deuterium in interstitial water from deep-sea cores: Journal of Geophysical Research Solid Earth, v. 93, no. C7, p. 8249-8263, https://doi.org/10.1029/JC093iC07p08249.","productDescription":"15 p.","startPage":"8249","endPage":"8263","numberOfPages":"15","costCenters":[],"links":[{"id":225638,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"93","issue":"C7","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"505a0004e4b0c8380cd4f539","contributors":{"authors":[{"text":"Friedman, I.","contributorId":95596,"corporation":false,"usgs":true,"family":"Friedman","given":"I.","email":"","affiliations":[],"preferred":false,"id":368411,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hardcastle, K.","contributorId":45825,"corporation":false,"usgs":true,"family":"Hardcastle","given":"K.","affiliations":[],"preferred":false,"id":368410,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70014446,"text":"70014446 - 1988 - US Geological Survey begins seismic ground response experiments in Washington State","interactions":[],"lastModifiedDate":"2012-03-12T17:19:31","indexId":"70014446","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1437,"text":"Earthquakes & Volcanoes (USGS)","active":true,"publicationSubtype":{"id":10}},"title":"US Geological Survey begins seismic ground response experiments in Washington State","docAbstract":"This article briefly describes the experimental monitoring of minor seismic features caused by distant nuclear explosions, mining blasts and rhythmic human pushing against wooden homes. Some means of response prediction are outlined in Washington State and some effects of seismic amplification by weak clayey sediments are described. The results of several experiments are described. -A.Scarth","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Earthquakes & Volcanoes (USGS)","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","usgsCitation":"Tarr, A., and King, K.W., 1988, US Geological Survey begins seismic ground response experiments in Washington State: Earthquakes & Volcanoes (USGS), v. 19, no. 5, p. 160-170.","startPage":"160","endPage":"170","numberOfPages":"11","costCenters":[],"links":[{"id":225639,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"19","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bbb4ce4b08c986b328608","contributors":{"authors":[{"text":"Tarr, Arthur C.","contributorId":75903,"corporation":false,"usgs":true,"family":"Tarr","given":"Arthur C.","affiliations":[],"preferred":false,"id":368412,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"King, K. W.","contributorId":105729,"corporation":false,"usgs":true,"family":"King","given":"K.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":368413,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70014447,"text":"70014447 - 1988 - Stable isotope geochemistry of sphalerite and other mineral matter in coal beds of the Illinois and Forest City basins","interactions":[],"lastModifiedDate":"2024-01-05T15:39:57.267954","indexId":"70014447","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","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":"Stable isotope geochemistry of sphalerite and other mineral matter in coal beds of the Illinois and Forest City basins","docAbstract":"Cleat and clastic dikes of Middle Pennsylvanian-age coal beds of the Illinois and Forest City basins of Illinois, Iowa, Missouri, and Kansas locally contain appreciable amounts of sphalerite within a kaolinite-pyrite-sphalerite (+ or - pyrite)-calcite paragenetic sequence. The sphalerite and associated minerals are of interest as a partial record of the history of fluids in the sedimentary basin and as possible indicators of Mississippi Valley-type mineralization. Moreover, zinc from the sphalerite may represent an exploitable by-product of coal mining and combustion.Pyrite is abundant in these coals both as fine-grained disseminated framboids that formed during early diagenesis and as coarser grained cleat fillings, etc., that formed much later. The delta 34 S values of this later pyrite, the sphalerite, and the coal organic matter range from -12 to 19 per mil. Within individual samples, however, pyrite, sphalerite, and organic matter sulfur delta 34 S values are nearly identical. This similarity strongly suggests related origins. The delta 34 S values of pyrite, sphalerite, and organic matter from coals of the Illinois basin and the central and southern Forest City basin range from -12 to 0 per mil. This range is not unique to the sphalerite-bearing coals; pyrite and organic matter from sphalerite-free high sulfur coals have similar delta 34 S values (Price and Shieh, 1979). We believe that sulfur produced by the breakdown of organosulfur compounds in the coal is incorporated into the epigenetic sulfides. In the northern Forest City basin, however, many samples have delta 34 S values between 8 and 19 per mil. These are similar to the delta 34 S values of sphalerite and pyrite from the Upper Mississippi Valley Zn-Pb district which lies northeast of the Forest City basin and north of the Illinois basin. This similarity suggests input from a Mississippi Valley-type hydrothermal system.Cleat kaolinite has delta D values of -36 to -24 per mil and delta 18 O values of 19.2 to 20.2 per mil. Assuming that clearing postdated the lignite rank of coalification implies that kaolinite was deposited between 40 degrees and 100 degrees C. At the lower temperatures, the kaolinite fluid would have had an isotopic composition similar to seawater; at the higher temperatures, it would have had a composition similar to the sphalerite-depositing fluid. Sphalerite was deposited from a fluid that was chemically and isotopically similar to the fluids responsible for the main-stage ores of the Upper Mississippi Valley Zn-Pb district (75 degrees -113 degrees C, approximately 21 equiv wt % NaCl, delta D = -65 to -3ppm, and delta 18 O = -0.9-9.9ppm). The isotopic compositions (delta 13 C = -12.4 to -2.7ppm and delta 18 O = 21.1-25.8ppm) and paragenetic positions of the cleat calcite samples are similar to those of the late-stage calcite of the Upper Mississippi Valley Zn-Pb and Illinois-Kentucky fluorspar districts. Calcite inclusion fluids had delta D (sub H 2 O) values of -80 and -58 per mil, implying a meteoric water source. At probable temperatures of 15 degrees to 75 degrees C, this calcite formed from fluids having calculated delta 18 O (sub H 2 O) values of -9 to 1 per mil, implying slight to moderate exchange with sedimentary rocks. The diagenetic-epigenetic history of fluids recorded by the cleat minerals probably began with a slightly evolved seawater, followed by a metal-bearing deep basin brine, and concluded with a cooler, slightly evolved, meteoric-water fluid.
","language":"English","publisher":"Society of Economic Geologists","doi":"10.2113/gsecongeo.83.5.990","issn":"03610128","usgsCitation":"Whelan, J.F., Cobb, J., and Rye, R.O., 1988, Stable isotope geochemistry of sphalerite and other mineral matter in coal beds of the Illinois and Forest City basins: Economic Geology, v. 83, no. 5, p. 990-1007, https://doi.org/10.2113/gsecongeo.83.5.990.","productDescription":"18 p.","startPage":"990","endPage":"1007","numberOfPages":"18","costCenters":[],"links":[{"id":225640,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"83","issue":"5","noUsgsAuthors":false,"publicationDate":"1988-08-01","publicationStatus":"PW","scienceBaseUri":"505b9679e4b08c986b31b51e","contributors":{"authors":[{"text":"Whelan, J. F.","contributorId":45328,"corporation":false,"usgs":true,"family":"Whelan","given":"J.","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":368414,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cobb, J.C.","contributorId":103419,"corporation":false,"usgs":true,"family":"Cobb","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":368416,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Rye, R. O.","contributorId":66208,"corporation":false,"usgs":true,"family":"Rye","given":"R.","email":"","middleInitial":"O.","affiliations":[],"preferred":false,"id":368415,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70014449,"text":"70014449 - 1988 - Geochemistry of some gases in hydrothermal fluids from the southern Juan de Fuca Ridge","interactions":[],"lastModifiedDate":"2024-06-05T15:00:24.666864","indexId":"70014449","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":6453,"text":"Journal of Geophysical Research Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Geochemistry of some gases in hydrothermal fluids from the southern Juan de Fuca Ridge","docAbstract":"Five samples of hydrothermal fluids from two vent areas on the southern Juan de Fuca Ridge were analyzed for dissolved gases. Concentrations in the end-member hydrothermal fluid of H2 (270–527 μmol/kg), CH4 (82–118 μmol/kg), and CO2 (3920–4460 μmol/kg) are well above values in ambient seawater and are similar to concentrations reported for other ridge crest hydrothermal systems. The carbon isotopic ratios of the CH4 (δ13C = −17.8 to −20.8) and CO2 (δ13C = −3.6 to −4.7) suggest that at least some of the CH4 and CO2 in the fluids is basalt-derived. The range of δ13C values for the basalt-derived CO2 is −6.8 to −9.7, calculated by assuming conservation of recharge ΣCO2 during hydrothermal circulation. Apparent temperatures of equilibration between the CH4 and the basalt-derived CO2 range from 640°C to 750°C. Small amounts of ethane (C2H6/CH4 ≅ 0.9 × 10−3−2.2 × 10−3), propane, and butane detected in the samples may also have formed in the basalt. One sample of almost pure (95.5%) hydrothermal fluid contained a significant fraction, up to 63% and 74%, respectively, of the recharge Ar and N2. This suggests that the fluid has not undergone extensive vapor-liquid phase separation.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB093iB12p15305","issn":"01480227","usgsCitation":"Evans, W.C., White, L.D., and Rapp, J.B., 1988, Geochemistry of some gases in hydrothermal fluids from the southern Juan de Fuca Ridge: Journal of Geophysical Research Solid Earth, v. 93, no. B12, p. 15305-15313, https://doi.org/10.1029/JB093iB12p15305.","productDescription":"9 p.","startPage":"15305","endPage":"15313","costCenters":[],"links":[{"id":225706,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"93","issue":"B12","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"505a1713e4b0c8380cd55387","contributors":{"authors":[{"text":"Evans, William C.","contributorId":104903,"corporation":false,"usgs":true,"family":"Evans","given":"William","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":368420,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"White, L. D.","contributorId":14330,"corporation":false,"usgs":true,"family":"White","given":"L.","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":368418,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Rapp, J. B.","contributorId":28987,"corporation":false,"usgs":true,"family":"Rapp","given":"J.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":368419,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70014451,"text":"70014451 - 1988 - Preliminary observations of streamflow generation during storms in a forested Piedmont watershed using temperature as a tracer","interactions":[],"lastModifiedDate":"2024-04-19T19:36:55.997833","indexId":"70014451","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2233,"text":"Journal of Contaminant Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Preliminary observations of streamflow generation during storms in a forested Piedmont watershed using temperature as a tracer","docAbstract":"Variations in streamwater temperature at the outlet of a 41-ha forested watershed at Panola Mountain in the Georgia Piedmont indicate that the initial rapid hydrologic response is caused by a combination of groundwater discharge and channel interception of rainwater. A storm in May 1986 caused a rapid increase in discharge that was accompanied by a decrease in streamwater temperature and a rise in the water table level adjacent to the stream. The higher water table provided the hydraulic gradient necessary to increase the discharge of colder groundwater to the stream. Storms that occurred under very dry antecedent conditions in July 1986 and June 1987 caused a rapid hydrologic response but no change in water table level, indicating the response was caused by channel interception of rainwater. This conclusion was supported by increases in streamwater temperature in the June storm and by chemical changes in the July storm. When rainfall is sufficient, flow in the ephemeral part of the stream in the catchment headwaters generates a second and larger discharge peak that reflects the chemistry and temperature of runoff from a 3-ha granite outcrop in the headwaters; sulfate concentration and temperature increase and alkalinity decreases relative to prestorm conditions. The initial response, however, results from channel interception and groundwater discharge. Rapid rises in the water table level during some storms suggest that macropore flow may play a major role in the hydrologic response of the watershed to rainstorms.
","language":"English","publisher":"Elsevier","doi":"10.1016/0169-7722(88)90040-X","issn":"01697722","usgsCitation":"Shanley, J.B., and Peters, N., 1988, Preliminary observations of streamflow generation during storms in a forested Piedmont watershed using temperature as a tracer: Journal of Contaminant Hydrology, v. 3, no. 2-4, p. 349-365, https://doi.org/10.1016/0169-7722(88)90040-X.","productDescription":"17 p.","startPage":"349","endPage":"365","numberOfPages":"17","costCenters":[],"links":[{"id":225708,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"3","issue":"2-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a8936e4b0c8380cd7dd41","contributors":{"authors":[{"text":"Shanley, J. B.","contributorId":52226,"corporation":false,"usgs":true,"family":"Shanley","given":"J.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":368424,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Peters, N.E.","contributorId":33332,"corporation":false,"usgs":true,"family":"Peters","given":"N.E.","email":"","affiliations":[],"preferred":false,"id":368423,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70014453,"text":"70014453 - 1988 - Coastal geomorphology of arctic Alaska","interactions":[],"lastModifiedDate":"2012-03-12T17:19:31","indexId":"70014453","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3519,"text":"Technical Council on Cold Regions Engineering Monograph","active":true,"publicationSubtype":{"id":10}},"title":"Coastal geomorphology of arctic Alaska","docAbstract":"The treeless, tundra-plain of northern Alaska merges with the Arctic Ocean along a coastal area characterized by low tundra bluffs, and sparse coastal and delta dunes. Coastal engineering projects that aggrade or degrade permafrost will alter the geomorphology and rates of coastal processes by changing coastal stability. Similarly, projects that modify the ice environment (artificial islands) or the coastal configuration (causeways) will cause nature to readjust to the new process regime, resulting in modification of the coast. In this paper the authors describe the coastal geomorphology from Barrow to the Canadian border. In addition, they provide a general outline and extensive references of the major coastal processes operating in this environment that will be useful on coastal environments elsewhere in the Arctic.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Technical Council on Cold Regions Engineering Monograph","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","isbn":"0872626393; 0872626393","usgsCitation":"Barnes, P.W., Rawlinson, S.E., and Reimnitz, E., 1988, Coastal geomorphology of arctic Alaska: Technical Council on Cold Regions Engineering Monograph, p. 3-30.","startPage":"3","endPage":"30","numberOfPages":"28","costCenters":[],"links":[{"id":225774,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f782e4b0c8380cd4cb63","contributors":{"authors":[{"text":"Barnes, Peter W.","contributorId":6042,"corporation":false,"usgs":true,"family":"Barnes","given":"Peter","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":368427,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rawlinson, Stuart E.","contributorId":99708,"corporation":false,"usgs":true,"family":"Rawlinson","given":"Stuart","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":368429,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Reimnitz, Erk","contributorId":17963,"corporation":false,"usgs":true,"family":"Reimnitz","given":"Erk","email":"","affiliations":[],"preferred":false,"id":368428,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70014454,"text":"70014454 - 1988 - Sorption of vapors of some organic liquids on soil humic acid and its relation to partitioning of organic compounds in soil organic matter","interactions":[],"lastModifiedDate":"2020-01-12T13:34:48","indexId":"70014454","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","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":"Sorption of vapors of some organic liquids on soil humic acid and its relation to partitioning of organic compounds in soil organic matter","docAbstract":"Vapor sorption of water, ethanol, benzene, hexane, carbon tetrachloride, 1,1,1-trichloroethane, trichloroethylene, tetrachloroethylene, and 1,2-dibromoethane on (Sanhedron) soil humic acid has been determined at room temperature. Isotherms for all organic liquids are highly linear over a wide range of relative pressure, characteristic of the partitioning (dissolution) of the organic compounds in soil humic acid. Polar liquids exhibit markedly greater sorption capacities on soil humic acid than relatively nonpolar liquids, in keeping with the polar nature of the soil humic acid as a partition medium. The limiting sorption (partition) capacities of relatively non-polar liquids are remarkably similar when expressed in terms of volumes per unit weight of soil humic acid. The soil humic acid is found to be about half as effective as soil organic matter in sorption of relatively nonpolar organic compounds. The nearly constant limiting sorption capacity for nonpolar organic liquids with soil humic acid on a volume-to-weight basis and its efficiency in sorption relative to soil organic matter provide a basis for predicting the approximate sorption (partition) coefficients of similar compounds in uptake by soil in aqueous systems.
","language":"English","publisher":"ACS","doi":"10.1021/es00168a010","issn":"0013936X","usgsCitation":"Chlou, G., Kile, D.E., and Malcolm, R., 1988, Sorption of vapors of some organic liquids on soil humic acid and its relation to partitioning of organic compounds in soil organic matter: Environmental Science & Technology, v. 22, no. 3, p. 298-303, https://doi.org/10.1021/es00168a010.","productDescription":"6 p.","startPage":"298","endPage":"303","numberOfPages":"6","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":225775,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"22","issue":"3","noUsgsAuthors":false,"publicationDate":"2002-05-01","publicationStatus":"PW","scienceBaseUri":"505b9310e4b08c986b31a27d","contributors":{"authors":[{"text":"Chlou, G.T.","contributorId":98475,"corporation":false,"usgs":true,"family":"Chlou","given":"G.T.","email":"","affiliations":[],"preferred":false,"id":368432,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kile, D. E.","contributorId":22758,"corporation":false,"usgs":true,"family":"Kile","given":"D.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":368430,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Malcolm, Ronald L.","contributorId":46075,"corporation":false,"usgs":true,"family":"Malcolm","given":"Ronald L.","affiliations":[],"preferred":false,"id":368431,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70014455,"text":"70014455 - 1988 - Vapor-dominated zones within hydrothermal systems: Evolution and natural state","interactions":[],"lastModifiedDate":"2024-06-05T14:53:15.43716","indexId":"70014455","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":6453,"text":"Journal of Geophysical Research Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Vapor-dominated zones within hydrothermal systems: Evolution and natural state","docAbstract":"Three conceptual models illustrate the range of hydrothermal systems in which vapor-dominated conditions are found. The first model (model I) represents a system with an extensive near-vaporstatic vapor-dominated zone and limited liquid throughflow and is analogous to systems such as The Geysers, California. Such systems can evolve within low-permeability barriers without changes in boundary conditions or rock properties, given an adequate supply of heat. Their scarcity in nature may be due to the need for a long-lived, potent heat source and for a low-permeability aureole that remains intact for significant lengths of time. Models II and III represent systems with significant liquid throughflow and include steam-heated discharge features at higher elevations and high-chloride springs at lower elevations, connected to and fed by a single circulation system at depth. In model II, as in model I, the vapor-dominated zone has a near-vaporstatic vertical pressure gradient and is generally underpressured with respect to local hydrostatic pressure. The vapor-dominated zone in model III is quite different, in that phase separation takes place at pressures close to local hydrostatic and the overall pressure gradient is near hydrostatic. A relatively large number of high-temperature systems in regions of moderate to great topographic relief are similar to either model II or model III; however, in most cases there are insufficient data to establish a single preferred model.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB093iB11p13635","issn":"01480227","usgsCitation":"Ingebritsen, S.E., and Sorey, M., 1988, Vapor-dominated zones within hydrothermal systems: Evolution and natural state: Journal of Geophysical Research Solid Earth, v. 93, no. B11, p. 13635-13655, https://doi.org/10.1029/JB093iB11p13635.","productDescription":"21 p.","startPage":"13635","endPage":"13655","costCenters":[],"links":[{"id":225776,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"93","issue":"B11","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"505bc120e4b08c986b32a461","contributors":{"authors":[{"text":"Ingebritsen, S. E.","contributorId":8078,"corporation":false,"usgs":true,"family":"Ingebritsen","given":"S.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":368433,"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":368434,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70014456,"text":"70014456 - 1988 - Crustal structure of east central Oregon: Relation between Newberry Volcano and regional crustal structure","interactions":[],"lastModifiedDate":"2020-05-07T14:54:37.865133","indexId":"70014456","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2312,"text":"Journal of Geophysical Research","active":true,"publicationSubtype":{"id":10}},"title":"Crustal structure of east central Oregon: Relation between Newberry Volcano and regional crustal structure","docAbstract":"A 180-km-long seismic refraction transect from the eastern High Cascades, across Newberry Volcano, to the eastern High Lava Plains is used to investigate the subvolcanic crustal and upper mantle velocity structure there. Near-surface volcanic flows and sedimentary debris (1.6-4.7 km/s), ranging from 3 to 5 km in thickness, overlie subvolcanic Basin and Range structures. East and west of Newberry Volcano, the subvolcanic basement (5.6 km/s) has been downwarped, producing 5-km-deep basins. The midcrust (8- to 28-km depth) is characterized by velocities ranging from 6.1 to 6.5 km/s and varies laterally in thicknesses. The lower crust is characterized by an unusually high velocity (about 7.4 km/s), and its geometry mirrors the subvolcanic basement geometry. The Moho is located at a depth of 37 km and represents a transition to an upper mantle velocity of 8.1 km/s. The shallow subsurface (1.2 km) beneath Newberry Volcano is characterized by high-velocity 5.6 km/s, versus 4.1 km/s for the surrounding area) intrusions and appears to be located on a basement high. Beneath the seismic refraction array at Newberry Volcano, an absence of low-velocity anomalies suggests that large silicic magma chambers do not exist in the upper crust, but apparent high attenuation of the seismic wave field may be consistent with either partial melts in small volumes, elevated crustal temperatures, and/or poor geophone-recording site coupling.
","largerWorkTitle":"","language":"English","publisher":"AGU","doi":"10.1029/JB093iB09p10081","issn":"01480227","usgsCitation":"Catchings, R.D., and Mooney, W.D., 1988, Crustal structure of east central Oregon: Relation between Newberry Volcano and regional crustal structure: Journal of Geophysical Research, v. 93, no. B9, p. 10081-10094, https://doi.org/10.1029/JB093iB09p10081.","productDescription":"14 p.","startPage":"10081","endPage":"10094","costCenters":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":225833,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Oregon","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -123.00292968749999,\n 42.924251753870685\n ],\n [\n -118.36669921875,\n 42.924251753870685\n ],\n [\n -118.36669921875,\n 44.5278427984555\n ],\n [\n -123.00292968749999,\n 44.5278427984555\n ],\n [\n -123.00292968749999,\n 42.924251753870685\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"93","issue":"B9","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"5059fcece4b0c8380cd4e501","contributors":{"authors":[{"text":"Catchings, R. D.","contributorId":98738,"corporation":false,"usgs":true,"family":"Catchings","given":"R.","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":368436,"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":368435,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70014458,"text":"70014458 - 1988 - The growth of geological structures by repeated earthquakes: 2, Field examples of continental dip-slip faults","interactions":[],"lastModifiedDate":"2024-06-05T14:50:02.422105","indexId":"70014458","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":6453,"text":"Journal of Geophysical Research Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"The growth of geological structures by repeated earthquakes: 2, Field examples of continental dip-slip faults","docAbstract":"A strong test of our understanding of the earthquake cycle is the ability to reproduce extant fault-bounded geological structures, such as basins and ranges, which are built by repeated cycles of deformation. Along strike-slip faults, the coseismic and interseismic deformation can be nearly equal in magnitude and opposite in sign, resulting in little permanent deformation except for the fault offset. For dip-slip faults, portions of the crust are lifted and dropped, and so buoyancy forces are exerted. The seismic and interseismic deformations do not balance, and structures grow and become subject to erosion and deposition. We consider three examples for which the structure and fault geometry are well known: the White Wolf reverse fault in California, site of the 1952 Kern County M=7.3 earthquake, the Lost River normal fault in Idaho, site of the 1983 Borah Peak M=7.0 earthquake, and the Cricket Mountain normal fault in Utah, site of Quaternary slip events. Basin stratigraphy and seismic reflection records are used to profile the structure, and coseismic deformation measured by leveling surveys is used to estimate the fault geometry. To reproduce these structures, we add the deformation associated with the earthquake cycle (the coseismic slip and postseismic relaxation) to the flexure caused by the observed sediment load, treating the crust as a thin elastic plate overlying a fluid substrate. The cumulative deformation is principally dependent on the elastic plate thickness, modestly sensitive to the sediment-substrate density difference, and insensitive to the fluid viscosity for the 4- to 8-Ma structures. We deduce a longterm flexural rigidity of 2–15 × 1019 Nm; this is equivalent to an elastic plate thickness of 2–4 km for a Young's modulus of 2.5 × 1010 Nm−2. This value is found where independent estimates of the elastic thickness from the coherence between surface topography and gravity yield values of about 4 km, but where coseismic fault slip extends to a depth of 10–15 km. Thus much of the seismogenic crust must weaken substantially during the life of active faults, causing the fault-bounded basins to narrow over time.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB093iB11p13319","issn":"01480227","usgsCitation":"Stein, R., King, G., and Rundle, J.B., 1988, The growth of geological structures by repeated earthquakes: 2, Field examples of continental dip-slip faults: Journal of Geophysical Research Solid Earth, v. 93, no. B11, p. 13319-13331, https://doi.org/10.1029/JB093iB11p13319.","productDescription":"13 p.","startPage":"13319","endPage":"13331","costCenters":[],"links":[{"id":225835,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"93","issue":"B11","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"505baca9e4b08c986b32364a","contributors":{"authors":[{"text":"Stein, R.S.","contributorId":8875,"corporation":false,"usgs":true,"family":"Stein","given":"R.S.","email":"","affiliations":[],"preferred":false,"id":368441,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"King, G.C.P.","contributorId":18510,"corporation":false,"usgs":true,"family":"King","given":"G.C.P.","email":"","affiliations":[],"preferred":false,"id":368443,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Rundle, J. B.","contributorId":17766,"corporation":false,"usgs":false,"family":"Rundle","given":"J.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":368442,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70014460,"text":"70014460 - 1988 - Determining the distribution of hydraulic conductivity in a fractured limestone aquifer by simultaneous injection and geophysical logging","interactions":[],"lastModifiedDate":"2020-01-17T17:12:59","indexId":"70014460","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1861,"text":"Ground Water","active":true,"publicationSubtype":{"id":10}},"title":"Determining the distribution of hydraulic conductivity in a fractured limestone aquifer by simultaneous injection and geophysical logging","docAbstract":"A field technique for assessing the vertical distribution of hydraulic conductivity in an aquifer was applied to a fractured carbonate formation in southeastern Nevada. The technique combines the simultaneous use of fluid injection and geophysical logging to measure in situ vertical distributions of fluid velocity and hydraulic head down the borehole; these data subsequently are analyzed to arrive at quantitative estimates of hydraulic conductivity across discrete intervals in the aquifer. The results of this analysis identified the contact margin between the Anchor and Dawn Members of the Monte Cristo Limestone as being the dominant transmissive unit. -from Authors","language":"English","publisher":"Wiley","doi":"10.1111/j.1745-6584.1988.tb00792.x","issn":"0017467X","usgsCitation":"Morin, R.H., Hess, A., and Paillet, F.L., 1988, Determining the distribution of hydraulic conductivity in a fractured limestone aquifer by simultaneous injection and geophysical logging: Ground Water, v. 26, no. 5, p. 587-595, https://doi.org/10.1111/j.1745-6584.1988.tb00792.x.","productDescription":"9 p.","startPage":"587","endPage":"595","numberOfPages":"9","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":225896,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Nevada","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -114.521484375,\n 35.24561909420681\n ],\n [\n -113.99414062499999,\n 39.06184913429154\n ],\n [\n -113.8623046875,\n 40.04443758460856\n ],\n [\n -118.828125,\n 39.36827914916014\n ],\n [\n -117.6416015625,\n 37.055177106660814\n ],\n [\n -114.521484375,\n 35.24561909420681\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"26","issue":"5","noUsgsAuthors":false,"publicationDate":"2006-03-21","publicationStatus":"PW","scienceBaseUri":"5059fff5e4b0c8380cd4f4cf","contributors":{"authors":[{"text":"Morin, Roger H. rhmorin@usgs.gov","contributorId":2432,"corporation":false,"usgs":true,"family":"Morin","given":"Roger","email":"rhmorin@usgs.gov","middleInitial":"H.","affiliations":[],"preferred":true,"id":779727,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hess, A.E.","contributorId":71979,"corporation":false,"usgs":true,"family":"Hess","given":"A.E.","email":"","affiliations":[],"preferred":false,"id":368447,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Paillet, Frederick L.","contributorId":63820,"corporation":false,"usgs":true,"family":"Paillet","given":"Frederick","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":368446,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70014461,"text":"70014461 - 1988 - The global distribution, abundance, and stability of SO2 on Io","interactions":[],"lastModifiedDate":"2012-03-12T17:19:30","indexId":"70014461","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1963,"text":"Icarus","active":true,"publicationSubtype":{"id":10}},"title":"The global distribution, abundance, and stability of SO2 on Io","docAbstract":"Sulfur dioxide distribution and abundances, bolometric hemispheric albedos, and passive surface temperatures on Io are modeled and mapped globally from Voyager multispectral mosaics, Earth-based spectra, and photometric descriptions. Photometric models indicate global average values for regolith porosity of 75-95% and macroscopic roughness with a mean slope angle of ~30??. Abundances of SO2 suggested by observations at uv-visible wavelengths and at 4.08 ??m are partially reconciled by intimate-mixing models; 30-50% SO2 coverage of the integral disk is indicated. Three major spectral end members, with continuous mixing, are recognized from the Voyager multispectral mosaics; one of these end members is identified as SO2. Intimate-mixing models with the three spectal end members are used to produce abundance maps for the optical surface; ~30% of Io's total optical surface consists of SO2. The SO2 is concentrated in the bright equatorial band and is relatively deficient in the region of Pele-type volcanic reuptions (long 240??-360??) and the polar regions. Temperatures are computed to vary over a 40??K range, at the same illumination angle, according to variations in surface bolometric hemispheric albedo. The brightest (and locally coldest) areas correspond to areas rich in SO2 and are concentrated in an equatorial band (??30?? lat), but many small cold patches occur elsewhere. These cold patches have radiative equilibrium temperatures ???120??K at the subsolar point, resulting in SO2 saturation vapor pressures ???10-8 bar. Midlatitude areas and the region of Pele-type plume eruptions are generally warmer (due to lower albedos). These results for surface temperatures and SO2 abundances and distribution support the regional coldtrapping model for the surface and atmospheric SO2 presented by F.P. Fanale, W.B. Banerdt, L.S. Elson, T.V. Johnson, and R.W. Zurek (1982, In Satellites of Jupiter (D. Morrison, Ed.), pp. 756-781, Univ. of Arizona Press, Tucson), although the region of Pele-type volcanic eruptions may be better characterized by the regolith condtrapping/volcanic-venting model of D.L. Matson and D.B. Nash (1983, J. Geophys. Res. 88, 4771-4783). The bright equatorial band is especially effective at slowing the formation of polar caps of SO2, both by reducing the sublimation rate near the subsolar point and by coldtrapping the SO2 in the equatorial region, so that competing processes of sputtering and volcanic resurfacing may prevent the formation of polar SO2 caps.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Icarus","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/0019-1035(88)90157-1","issn":"00191035","usgsCitation":"McEwen, A.S., Johnson, T.V., Matson, D.L., and Soderblom, L., 1988, The global distribution, abundance, and stability of SO2 on Io: Icarus, v. 75, no. 3, p. 450-478, https://doi.org/10.1016/0019-1035(88)90157-1.","startPage":"450","endPage":"478","numberOfPages":"29","costCenters":[],"links":[{"id":205665,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/0019-1035(88)90157-1"},{"id":225897,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"75","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bac8ae4b08c986b32357f","contributors":{"authors":[{"text":"McEwen, A. S.","contributorId":11317,"corporation":false,"usgs":true,"family":"McEwen","given":"A.","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":368449,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Johnson, T. V.","contributorId":79619,"corporation":false,"usgs":false,"family":"Johnson","given":"T.","email":"","middleInitial":"V.","affiliations":[],"preferred":false,"id":368451,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Matson, D. L.","contributorId":59940,"corporation":false,"usgs":false,"family":"Matson","given":"D.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":368450,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Soderblom, L.A. 0000-0002-0917-853X","orcid":"https://orcid.org/0000-0002-0917-853X","contributorId":6139,"corporation":false,"usgs":true,"family":"Soderblom","given":"L.A.","affiliations":[],"preferred":false,"id":368448,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70014462,"text":"70014462 - 1988 - Gold and other metals in big sagebrush (Artemisia tridentata Nutt.) as an exploration tool, Gold Run District, Humboldt County, Nevada","interactions":[],"lastModifiedDate":"2024-04-17T23:47:39.989859","indexId":"70014462","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","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":"Gold and other metals in big sagebrush (Artemisia tridentata Nutt.) as an exploration tool, Gold Run District, Humboldt County, Nevada","docAbstract":"Big sagebrush — a cold-desert species that dominates the terrain over large parts of western United States — was sampled along several traverses that crossed thermally metamorphosed limestone, phyllitic shale, and schist of the Middle and Upper Cambrian Preble Formation that host skarn-, disseminated gold and silver-, and hot springs gold-type mineral occurrences. Patterns of detectable levels of gold (8 to 28 ppb or ng g−1) in ash of new growth were consistent with areas affected by known or suspected gold mineralization. Soils collected along one of the traverses where a selenium-indicator plant was common contained no gold above background levels of 2ppb, but were consistently high in As, Sb, and Zn, and several samples were unusually high in Se (maximum 11 ppm or μg g−1). Sagebrush along this traverse contained Li at levels above norms for this species. We also found a puzzling geochemical anomaly at a site basinward from active hot springs along a range-front fault scarp. Sagebrush at this site contained a trace of gold and an unusually high concentration of Cd (13 ppm) and the soil had anomalous concentrations of Cd and Bi (3.2 and 6 ppm, respectively). The source of this anomaly could be either metal-rich waters from an irrigation ditch or leakage along a buried fault. Despite the limited nature of the study, we conclude that gold in sagebrush could be a cost-effective guide to drilling locations in areas where the geology seems favorable for disseminated and vein precious metals.
A computer-controlled spectrometer with a photodiode array detector has been used for wavelength and temperature resolved characterization of the vapor produced by an electrothermal atomizer. The system has been used to study the chloride matrix interference on the atomic absorption spectrometric determination of manganese and copper. The suppression of manganese and copper atom populations by matrix chlorides such as those of calcium and magnesium is due to the gas-phase formation of an analyte chloride species followed by the diffusion of significant fractions of these species from the atom cell prior to completion of the atomization process. The analyte chloride species cannot be formed when matrix chlorides with metal-chloride bond dissociation energies above those of the analyte chlorides are the principal entitles present. The results indicate that multiple wavelength spectrometry used to obtain temperature-resolved spectra is a viable tool in the mechanistic characterization of interference effects observed with electrothermal atomization systems.
","language":"English","publisher":"ACS","doi":"10.1021/ac00174a010","issn":"00032700","usgsCitation":"Shekiro, J., Skogerboe, R., and Taylor, H.E., 1988, Mechanistic characterization of chloride interferences in electrothermal atomization systems: Analytical Chemistry, v. 60, no. 23, p. 2578-2582, https://doi.org/10.1021/ac00174a010.","productDescription":"5 p.","startPage":"2578","endPage":"2582","numberOfPages":"5","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":225958,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"60","issue":"23","noUsgsAuthors":false,"publicationDate":"2002-05-01","publicationStatus":"PW","scienceBaseUri":"505a5373e4b0c8380cd6cac4","contributors":{"authors":[{"text":"Shekiro, J.M. Jr.","contributorId":11773,"corporation":false,"usgs":true,"family":"Shekiro","given":"J.M.","suffix":"Jr.","affiliations":[],"preferred":false,"id":368459,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Skogerboe, R.K.","contributorId":7348,"corporation":false,"usgs":true,"family":"Skogerboe","given":"R.K.","email":"","affiliations":[],"preferred":false,"id":368458,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Taylor, Howard E. hetaylor@usgs.gov","contributorId":1551,"corporation":false,"usgs":true,"family":"Taylor","given":"Howard","email":"hetaylor@usgs.gov","middleInitial":"E.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":368460,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70014466,"text":"70014466 - 1988 - Thermochronology of economic mineral deposits: Dating the stages of mineralization at Panasqueira, Portugal, by high-precision 40Ar/ 39Ar age spectrum techniques on muscovite","interactions":[],"lastModifiedDate":"2024-01-05T16:27:52.234009","indexId":"70014466","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1472,"text":"Economic Geology","active":true,"publicationSubtype":{"id":10}},"displayTitle":"Thermochronology of economic mineral deposits: Dating the stages of mineralization at Panasqueira, Portugal, by high-precision 40Ar/ 39Ar age spectrum techniques on muscovite","title":"Thermochronology of economic mineral deposits: Dating the stages of mineralization at Panasqueira, Portugal, by high-precision 40Ar/ 39Ar age spectrum techniques on muscovite","docAbstract":"40 Ar/ 39 Ar age spectrum dates for 13 muscovites have been used to reconstruct the thermal history (thermochronology) of the Panasqueira, Portugal, tin-tungsten deposit, a deposit spatially associated with a belt of Hercynian plutons. Muscovite samples with an age difference as small as 2.2 m.y. (0.7% of the age) are statistically distinct. Statistics are even better for comparison of multiple samples from separate events; that is, a difference of 0.9 m.y. (0.3%) can be resolved in this approximately 300-m.y.-old deposit. The major tin and tungsten ore-forming stages, which are the oxide-silicate stage, the main sulfide stage, and greisenization, occurred between 296.3 + or - 0.8 (1 Sigma ) and 291.6 + or - 0.8 m.y. (1 Sigma ). The first substage of the oxide-silicate stage was a short-lived thermal pulse at 296.3 + or - 0.6 m.y.; the fluids responsible may have emanated from the known granite cupola. The main sulfide stage was active at 294.5 + or - 0.9 m.y. as a slightly longer lived pulse with oldest evidence for this stage (295.8 + or - 0.6 m.y.) coming from areas farthest away from the known cupola and youngest evidence (293.5 + or - 0.8 m.y.) closest to the cupola. A second substage of the oxide-silicate stage occurred as a short-lived thermal pulse at 292.9 + or - 0.7 m.y., synchronous with greisenization of the cupola and alteration of the silica cap at 292.1 + or - 0.4 m.y. The duration of activity of the oxide-silicate stage, the main sulfide stage, greisenization, and alteration of the silica cap based on the ages of all 13 muscovites was greater than 4.2 + or - 0.5 m.y. (1 Sigma ). Minor argon loss from all dated muscovites occurred during later reheating, probably during the longer lived pyrrhotite alteration stage. A single center, the known cupola, had a prolonged role and was the source for main sulfide stage, oxide-silicate stage II, greisenization, and alteration of the silica cap and possibly oxide-silicate stage I and the pyrrhotite alteration stage; however, a separate source for these latter two stages cannot be ruled out.This study is an example of a new and powerful application of 40 Ar/ 39 Ar age spectrum dating of muscovite. Because of the high precision demonstrated in this study, it is now possible to establish time constraints necessary for solving some of the long-standing problems in economic geology. Beyond this, the unique geologic situation of Panasqueira has allowed us to quantify the thermal characteristics of muscovite. Published fluid inclusion data have been used to estimate a muscovite argon closure temperature of approximately 325 degrees C during rapid cooling or short reheating and a temperature of approximately 270 degrees C during slow cooling or extended reheating. Argon-loss patterns displayed by all dated muscovites resulted from reheating after original closure; the mechanism for this argon loss appears to have been argon transport by volume diffusion. Thus, 40 Ar/ 39 Ar age spectrum dating of muscovite can be used to evaluate thermal conditions controlling argon diffusion as well as age, duration, and number of episodes of mineralization.
","language":"English","publisher":"Society of Economic Geologists","doi":"10.2113/gsecongeo.83.2.335","issn":"03610128","usgsCitation":"Snee, L., Sutter, J.F., and Kelly, W., 1988, Thermochronology of economic mineral deposits: Dating the stages of mineralization at Panasqueira, Portugal, by high-precision 40Ar/ 39Ar age spectrum techniques on muscovite: Economic Geology, v. 83, no. 2, p. 335-354, https://doi.org/10.2113/gsecongeo.83.2.335.","productDescription":"20 p.","startPage":"335","endPage":"354","numberOfPages":"20","costCenters":[],"links":[{"id":225959,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"83","issue":"2","noUsgsAuthors":false,"publicationDate":"1988-04-01","publicationStatus":"PW","scienceBaseUri":"505bb26be4b08c986b3257bb","contributors":{"authors":[{"text":"Snee, L.W.","contributorId":99981,"corporation":false,"usgs":true,"family":"Snee","given":"L.W.","email":"","affiliations":[],"preferred":false,"id":368463,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sutter, J. F.","contributorId":59779,"corporation":false,"usgs":true,"family":"Sutter","given":"J.","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":368462,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kelly, W.C.","contributorId":53963,"corporation":false,"usgs":true,"family":"Kelly","given":"W.C.","email":"","affiliations":[],"preferred":false,"id":368461,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70014699,"text":"70014699 - 1988 - Gravity-induced stresses in stratified rock masses","interactions":[],"lastModifiedDate":"2012-03-12T17:19:35","indexId":"70014699","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3306,"text":"Rock Mechanics and Rock Engineering","active":true,"publicationSubtype":{"id":10}},"title":"Gravity-induced stresses in stratified rock masses","docAbstract":"This paper presents closed-form solutions for the stress field induced by gravity in anisotropic and stratified rock masses. These rocks are assumed to be laterally restrained. The rock mass consists of finite mechanical units, each unit being modeled as a homogeneous, transversely isotropic or isotropic linearly elastic material. The following results are found. The nature of the gravity induced stress field in a stratified rock mass depends on the elastic properties of each rock unit and how these properties vary with depth. It is thermodynamically admissible for the induced horizontal stress component in a given stratified rock mass to exceed the vertical stress component in certain units and to be smaller in other units; this is not possible for the classical unstratified isotropic solution. Examples are presented to explore the nature of the gravity induced stress field in stratified rock masses. It is found that a decrease in rock mass anisotropy and a stiffening of rock masses with depth can generate stress distributions comparable to empirical hyperbolic distributions previously proposed in the literature. ?? 1988 Springer-Verlag.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Rock Mechanics and Rock Engineering","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Springer-Verlag","doi":"10.1007/BF01019673","issn":"07232632","usgsCitation":"Amadei, B., Swolfs, H., and Savage, W.Z., 1988, Gravity-induced stresses in stratified rock masses: Rock Mechanics and Rock Engineering, v. 21, no. 1, p. 1-20, https://doi.org/10.1007/BF01019673.","startPage":"1","endPage":"20","numberOfPages":"20","costCenters":[],"links":[{"id":205626,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF01019673"},{"id":225397,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"21","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a2a43e4b0c8380cd5b017","contributors":{"authors":[{"text":"Amadei, B.","contributorId":86902,"corporation":false,"usgs":true,"family":"Amadei","given":"B.","affiliations":[],"preferred":false,"id":369033,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Swolfs, H.S.","contributorId":70759,"corporation":false,"usgs":true,"family":"Swolfs","given":"H.S.","affiliations":[],"preferred":false,"id":369032,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Savage, W. Z.","contributorId":106481,"corporation":false,"usgs":true,"family":"Savage","given":"W.","email":"","middleInitial":"Z.","affiliations":[],"preferred":false,"id":369034,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70014700,"text":"70014700 - 1988 - Analytical approach to calculation of response spectra from seismological models of ground motion","interactions":[],"lastModifiedDate":"2013-03-13T15:26:08","indexId":"70014700","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1434,"text":"Earthquake Engineering and Structural Dynamics","active":true,"publicationSubtype":{"id":10}},"title":"Analytical approach to calculation of response spectra from seismological models of ground motion","docAbstract":"An analytical approach to calculate response spectra from seismological models of ground motion is presented. Seismological models have three major advantages over empirical models: (1) they help in an understanding of the physics of earthquake mechanisms, (2) they can be used to predict ground motions for future earthquakes and (3) they can be extrapolated to cases where there are no data available. As shown with this study, these models also present a convenient form for the calculation of response spectra, by using the methods of random vibration theory, for a given magnitude and site conditions. The first part of the paper reviews the past models for ground motion description, and introduces the available seismological models. Then, the random vibration equations for the spectral response are presented. The nonstationarity, spectral bandwidth and the correlation of the peaks are considered in the calculation of the peak response.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Earthquake Engineering and Structural Dynamics","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Wiley","doi":"10.1002/eqe.4290160109","issn":"03756297","usgsCitation":"Safak, E., 1988, Analytical approach to calculation of response spectra from seismological models of ground motion: Earthquake Engineering and Structural Dynamics, v. 16, no. 1, p. 121-134, https://doi.org/10.1002/eqe.4290160109.","startPage":"121","endPage":"134","numberOfPages":"14","costCenters":[],"links":[{"id":225461,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":269246,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/eqe.4290160109"}],"volume":"16","issue":"1","noUsgsAuthors":false,"publicationDate":"2006-12-18","publicationStatus":"PW","scienceBaseUri":"5059e62ee4b0c8380cd47204","contributors":{"authors":[{"text":"Safak, Erdal","contributorId":73984,"corporation":false,"usgs":true,"family":"Safak","given":"Erdal","email":"","affiliations":[],"preferred":false,"id":369035,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70014709,"text":"70014709 - 1988 - Anomalous shear wave attenuation in the shallow crust beneath the Coso volcanic region, California","interactions":[],"lastModifiedDate":"2024-06-05T14:38:46.831799","indexId":"70014709","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":6453,"text":"Journal of Geophysical Research Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Anomalous shear wave attenuation in the shallow crust beneath the Coso volcanic region, California","docAbstract":"We use seismograms of local earthquakes to image relative shear wave attenuation structure in the shallow crust beneath the region containing the Coso volcanic-geothermal area of eastern California. SV and P wave amplitudes were measured from vertical component seismograms of earthquakes that occurred in the Cososouthem Sierra Nevada region from July 1983 to August 1985. Seismograms of 16 small earthquakes show SV amplitudes which are greatly diminished at some azimuths and takeoff angles, indicating strong lateral variations in S wave attenuation in the area. Three-dimensional images of the relative S wave attenuation structure are obtained from forward modeling and a back projection inversion of the amplitude data. The results indicate regions within a 20 by 30 by 10 km volume of the shallow crust (one shallower than 5 km) that severely attenuate SV waves passing through them. These anomalies lie beneath the Indian Wells Valley, 30 km south of the Coso volcanic field, and are coincident with the epicentral locations of recent earthquake swarms. No anomalous attenuation is seen beneath the Coso volcanic field above about 5 km depth. Geologic relations and the coincidence of anomalously slow P wave velocities suggest that the attenuation anomalies may be related to magmatism along the eastern Sierra front.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB093iB04p03321","issn":"01480227","usgsCitation":"Sanders, C., Ho-Liu, P., Rinn, D., and Hiroo, K., 1988, Anomalous shear wave attenuation in the shallow crust beneath the Coso volcanic region, California: Journal of Geophysical Research Solid Earth, v. 93, no. B4, p. 3321-3338, https://doi.org/10.1029/JB093iB04p03321.","productDescription":"18 p.","startPage":"3321","endPage":"3338","numberOfPages":"18","costCenters":[],"links":[{"id":480029,"rank":2,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://doi.org/10.1029/jb093ib04p03321","text":"External Repository"},{"id":225654,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"93","issue":"B4","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"5059ec4be4b0c8380cd4919b","contributors":{"authors":[{"text":"Sanders, C.","contributorId":91640,"corporation":false,"usgs":true,"family":"Sanders","given":"C.","email":"","affiliations":[],"preferred":false,"id":369059,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ho-Liu, P.","contributorId":36689,"corporation":false,"usgs":true,"family":"Ho-Liu","given":"P.","email":"","affiliations":[],"preferred":false,"id":369057,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Rinn, D.","contributorId":92436,"corporation":false,"usgs":true,"family":"Rinn","given":"D.","email":"","affiliations":[],"preferred":false,"id":369060,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hiroo, Kanamori","contributorId":60784,"corporation":false,"usgs":true,"family":"Hiroo","given":"Kanamori","affiliations":[],"preferred":false,"id":369058,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70014710,"text":"70014710 - 1988 - Using laser micro mass spectrometry with the LAMMA-1000 instrument for monitoring relative elemental concentrations in vitrinite","interactions":[],"lastModifiedDate":"2012-03-12T17:19:33","indexId":"70014710","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2742,"text":"Mikrochimica Acta","active":true,"publicationSubtype":{"id":10}},"title":"Using laser micro mass spectrometry with the LAMMA-1000 instrument for monitoring relative elemental concentrations in vitrinite","docAbstract":"The variation in relative elemental concentrations among a series of coal macerals belonging to the vitrinite maceral group was determined using laser micro mass spectrometry (LAMMS). Variations in Ba, Cr, Ga, Sr, Ti, and V concentrations among the coals were determined using the LAMM A-1000 instrument. LAMMS analysis is not limited to these elements; their selection illustrates the application of the technique. Ba, Cr, Ga, Sr, Ti, and V have minimal site-to-site variance in the vitrinite macerals of the studied coals as measured by LAMMS. The LAMMS data were compared with bulk elemental data obtained by instrumental neutron activation analysis (INAA) and D. C. arc optical emission spectroscopy (DCAS) in order to determine the reliability of the LAMMS data. The complex nature of the ionization phenomena in LAMMS and the lack of standards characterized on a microscale makes obtaining quantitative elemental data within the ionization microvolume difficult; however, we demonstrate that the relative variation of an element among vitrinites from different coal beds in the eastern United States can be observed using LAMMS in a \"bulk\" mode by accumulating signal intensities over several microareas of each vitrinite. Our studies indicate gross changes (greater than a factor of 2 to 5 depending on the element) can be monitored when the elemental concentration is significantly above the detection limit. \"Bulk\" mode analysis was conducted to evaluate the accuracy of future elemental LAMMS microanalyses. The primary advantage of LAMMS is the inherent spatial resolution, ~ 20 ??m for coal. Two different vitrite bands in the Lower Bakerstown coal bed (CLB-1) were analyzed. The analysis did not establish any certain concentration differences in Ba, Cr, Ga, Sr, Ti, and V between the two bands. ?? 1988 Springer-Verlag.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Mikrochimica Acta","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Springer-Verlag","doi":"10.1007/BF01236096","issn":"00263672","usgsCitation":"Morelli, J., Hercules, D., Lyons, P., Palmer, C., and Fletcher, J., 1988, Using laser micro mass spectrometry with the LAMMA-1000 instrument for monitoring relative elemental concentrations in vitrinite: Mikrochimica Acta, v. 96, no. 1-6, p. 105-118, https://doi.org/10.1007/BF01236096.","startPage":"105","endPage":"118","numberOfPages":"14","costCenters":[],"links":[{"id":205644,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF01236096"},{"id":225655,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"96","issue":"1-6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bc066e4b08c986b32a0de","contributors":{"authors":[{"text":"Morelli, J.J.","contributorId":90891,"corporation":false,"usgs":true,"family":"Morelli","given":"J.J.","email":"","affiliations":[],"preferred":false,"id":369065,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hercules, D.M.","contributorId":86905,"corporation":false,"usgs":true,"family":"Hercules","given":"D.M.","email":"","affiliations":[],"preferred":false,"id":369063,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lyons, P.C.","contributorId":87285,"corporation":false,"usgs":true,"family":"Lyons","given":"P.C.","email":"","affiliations":[],"preferred":false,"id":369064,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Palmer, C.A.","contributorId":81894,"corporation":false,"usgs":true,"family":"Palmer","given":"C.A.","email":"","affiliations":[],"preferred":false,"id":369062,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Fletcher, J.D.","contributorId":24928,"corporation":false,"usgs":true,"family":"Fletcher","given":"J.D.","email":"","affiliations":[],"preferred":false,"id":369061,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70014711,"text":"70014711 - 1988 - Conductive heat flux in VC-1 and the thermal regime of Valles caldera, Jemez Mountains, New Mexico","interactions":[],"lastModifiedDate":"2024-06-05T14:35:56.974184","indexId":"70014711","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":6453,"text":"Journal of Geophysical Research Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Conductive heat flux in VC-1 and the thermal regime of Valles caldera, Jemez Mountains, New Mexico","docAbstract":"Over 5% of heat in the western United States is lost through Quaternary silicic volcanic centers, including the Valles caldera in north central New Mexico. These centers are the sites of major hydrothermal activity and upper crustal metamorphism, metasomatism, and mineralization, producing associated geothermal resources. We present new heat flow data from Valles caldera core hole 1 (VC-1), drilled in the southwestern margin of the Valles caldera. Thermal conductivities were measured on 55 segments of core from VC-1, waxed and wrapped to preserve fluids. These values were combined with temperature gradient data to calculate heat flow. Above 335 m, which is probably unsaturated, heat flow is 247±16 mW m−2. The only deep temperature information available is from an uncalibrated commercial log made 19 months after drilling. Gradients, derived from uncalibrated temperature logs, and conductivities are inversely correlated between 335 and 737 m, indicating a conductive thermal regime, and component heat fluxes over three depth intervals (335–539 m, 549–628 m, and 628–737 m) are in excellent agreement with each other with an average of 504±15 mW m−2. Temperature logs to 518 m depth with well-calibrated temperature sensors result in a revised heat flow of 463±15 mW m. We use shallow thermal gradient data from 75 other sites in and around the caldera to interpret the thermal regime at the VC-1 site. A critical review of published thermal conductivity data from the Valles caldera yields an average thermal conductivity of ≥1 W m−1 K−1 for the near-surface tuffaceous material, and we assume that shallow gradient values (°C km−1) are approximately numerically equal to heat flow (mW m−2). Heat loss from the caldera is asymmetrically distributed, with higher values (400 mW m−2 or higher) concentrated in the west-southwestern quadrant of the caldera. This quadrant also contains the main drainage from the caldera and the youngest volcanism associated with the caldera. We interpret the shallow thermal gradient data and the thermal regime at VC-1 to indicate a long-lived hydrothermal (and magmatic) system in the southwestern Valles caldera that has been maintained through the generation of shallow magma bodies during the long postcollapse history of the caldera. High heat flow at the VC-1 site is interpreted to result from hot water circulating below the base of the core hole, and we attribute the lower heat flow in the unsaturated zone to hydrologic recharge.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB093iB06p06027","issn":"01480227","usgsCitation":"Sass, J., and Morgan, P., 1988, Conductive heat flux in VC-1 and the thermal regime of Valles caldera, Jemez Mountains, New Mexico: Journal of Geophysical Research Solid Earth, v. 93, no. B6, p. 6027-6039, https://doi.org/10.1029/JB093iB06p06027.","productDescription":"13 p.","startPage":"6027","endPage":"6039","numberOfPages":"13","costCenters":[],"links":[{"id":225656,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"93","issue":"B6","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"5059f9b9e4b0c8380cd4d753","contributors":{"authors":[{"text":"Sass, J.H.","contributorId":70749,"corporation":false,"usgs":true,"family":"Sass","given":"J.H.","email":"","affiliations":[{"id":595,"text":"U.S. Geological Survey","active":false,"usgs":true}],"preferred":false,"id":369067,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Morgan, P.","contributorId":34096,"corporation":false,"usgs":false,"family":"Morgan","given":"P.","email":"","affiliations":[],"preferred":false,"id":369066,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70014712,"text":"70014712 - 1988 - An economic and geographic appraisal of a spatial natural hazard risk: a study of landslide mitigation rules","interactions":[],"lastModifiedDate":"2013-03-13T21:03:32","indexId":"70014712","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1525,"text":"Environment and Planning A","active":true,"publicationSubtype":{"id":10}},"title":"An economic and geographic appraisal of a spatial natural hazard risk: a study of landslide mitigation rules","docAbstract":"Efficient mitigation of natural hazards requires a spatial representation of the risk, based upon the geographic distribution of physical parameters and man-related development activities. Through such a representation, the spatial probability of landslides based upon physical science concepts is estimated for Cincinnati, Ohio. Mitigation programs designed to reduce loss from landslide natural hazards are then evaluated. An optimum mitigation rule is suggested that is spatially selective and is determined by objective measurements of hillside slope and properties of the underlying soil. -Authors","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environment and Planning A","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1068/a200621","usgsCitation":"Bernknopf, R., Brookshire, D., Campbell, R.H., and Shapiro, C., 1988, An economic and geographic appraisal of a spatial natural hazard risk: a study of landslide mitigation rules: Environment and Planning A, v. 20, no. 5, p. 621-631, https://doi.org/10.1068/a200621.","startPage":"621","endPage":"631","numberOfPages":"11","costCenters":[],"links":[{"id":225657,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":269305,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1068/a200621"}],"volume":"20","issue":"5","noUsgsAuthors":false,"publicationDate":"1988-05-01","publicationStatus":"PW","scienceBaseUri":"5059ea2ce4b0c8380cd486a2","contributors":{"authors":[{"text":"Bernknopf, R. L.","contributorId":46082,"corporation":false,"usgs":true,"family":"Bernknopf","given":"R. L.","affiliations":[],"preferred":false,"id":369070,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Brookshire, D.S.","contributorId":43335,"corporation":false,"usgs":true,"family":"Brookshire","given":"D.S.","email":"","affiliations":[],"preferred":false,"id":369069,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Campbell, R. H.","contributorId":52160,"corporation":false,"usgs":true,"family":"Campbell","given":"R.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":369071,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Shapiro, C.D.","contributorId":24796,"corporation":false,"usgs":true,"family":"Shapiro","given":"C.D.","email":"","affiliations":[],"preferred":false,"id":369068,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70014713,"text":"70014713 - 1988 - Distribution, variability, and impacts of trace elements in San Francisco Bay","interactions":[],"lastModifiedDate":"2020-01-17T17:20:50","indexId":"70014713","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2676,"text":"Marine Pollution Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Distribution, variability, and impacts of trace elements in San Francisco Bay","docAbstract":"No abstract available.
","language":"English","publisher":"Elsevier","doi":"10.1016/0025-326X(88)90396-7","issn":"0025326X","usgsCitation":"Luoma, S.N., and Phillips, D., 1988, Distribution, variability, and impacts of trace elements in San Francisco Bay: Marine Pollution Bulletin, v. 19, no. 9, p. 413-425, https://doi.org/10.1016/0025-326X(88)90396-7.","productDescription":"13 p.","startPage":"413","endPage":"425","numberOfPages":"13","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":552,"text":"San Francisco Bay-Delta","active":false,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true},{"id":5079,"text":"Pacific Regional Director's Office","active":true,"usgs":true}],"links":[{"id":225722,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"San Francisco Bay","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -123.26660156249999,\n 37.28279464911045\n ],\n [\n -121.640625,\n 37.28279464911045\n ],\n [\n -121.640625,\n 38.22091976683121\n ],\n [\n -123.26660156249999,\n 38.22091976683121\n ],\n [\n -123.26660156249999,\n 37.28279464911045\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"19","issue":"9","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0326e4b0c8380cd50373","contributors":{"authors":[{"text":"Luoma, Samuel N. 0000-0001-5443-5091 snluoma@usgs.gov","orcid":"https://orcid.org/0000-0001-5443-5091","contributorId":2287,"corporation":false,"usgs":true,"family":"Luoma","given":"Samuel","email":"snluoma@usgs.gov","middleInitial":"N.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":779729,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Phillips, D.J.H.","contributorId":80829,"corporation":false,"usgs":true,"family":"Phillips","given":"D.J.H.","email":"","affiliations":[],"preferred":false,"id":369072,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70014714,"text":"70014714 - 1988 - Air encapsulation during infiltration","interactions":[],"lastModifiedDate":"2025-07-31T15:22:18.255661","indexId":"70014714","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3420,"text":"Soil Science Society of America Journal","active":true,"publicationSubtype":{"id":10}},"title":"Air encapsulation during infiltration","docAbstract":"A series of field and laboratory experiments were performed to measure the effects of air encapsulation within the soil's transmission zone upon several infiltration properties. In the field, infiltration rates were measured using a double-cap infiltrometer (DCI), and soil-water contents were measured using time-domain reflectometry (TDR). Before half of the infiltration experiments, CO2 was injected through the DCI into the soil to reduce the amount of air encapsulation in the soil's transmission zone. For a gravelly loam as steady infiltration rates were approached, the average volumetric water content was 0.38 cm3 cm−3 for control experiments and 0.43 cm3 cm−3 for CO2 experiments. The average steady infiltration rate was 0.42 cm min−1 for the control experiments compared to 4.40 cm min−1 for the CO2 experiments. For a sandy loam as steady infiltration rates were approached, the average volumetric water content was 0.43 cm3 cm−3 for control experiments compared with 0.45 cm3 cm−3 for CO2 experiments. The average final infiltration rate was 0.09 cm min−1 for the control experiments compared with 0.42 cm min−1 for the CO2 experiments. In the laboratory, infiltration experiments were performed using repacked soil columns (15-cm i.d. by 140 cm long), again using TDR and CO2 flooding. For a medium sand as steady infiltration rates were approached, the average volumetric water content was 0.29 cm3 cm−3 for the control experiments and 0.36 cm3 cm−3 for the CO2 experiments. The average steady infiltration rate was 0.25 cm min−1 for the control experiments and 1.23 cm min−1 for the CO2 experiments. For a loam as steady infiltration rates were approached, the average volumetric water content was 0.45 cm3 cm−3 for the control experiments and 0.50 cm3 cm−3 for the CO2 experiments. The average steady infiltration rate was 0.02 cm min−1 for the control experiments and 0.10 cm min−1 for the CO2 experiments. These results suggest that a significant portion of the total encapsulated air resided in interconnected pores within the soil's transmission zone. For the time scale considered, this residual air caused the effective hydraulic conductivity of the transmission zone to remain at a level no greater than 20% of the saturated hydraulic conductivity of the soil.
","language":"English","publisher":"Wiley","doi":"10.2136/sssaj1988.03615995005200010002x","issn":"03615995","usgsCitation":"Constantz, J., Herkelrath, W., and Murphy, F., 1988, Air encapsulation during infiltration: Soil Science Society of America Journal, v. 52, no. 1, p. 10-16, https://doi.org/10.2136/sssaj1988.03615995005200010002x.","productDescription":"7 p.","startPage":"10","endPage":"16","costCenters":[],"links":[{"id":225723,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"52","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e917e4b0c8380cd480bb","contributors":{"authors":[{"text":"Constantz, Jim","contributorId":66338,"corporation":false,"usgs":true,"family":"Constantz","given":"Jim","affiliations":[],"preferred":false,"id":369074,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Herkelrath, W.N.","contributorId":77981,"corporation":false,"usgs":true,"family":"Herkelrath","given":"W.N.","affiliations":[],"preferred":false,"id":369076,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Murphy, F.","contributorId":42358,"corporation":false,"usgs":true,"family":"Murphy","given":"F.","email":"","affiliations":[],"preferred":false,"id":369075,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70014717,"text":"70014717 - 1988 - Processes affecting the distribution of selenium in shallow groundwater of agricultural areas, western San Joaquin Valley, California","interactions":[{"subject":{"id":18670,"text":"ofr87220 - 1987 - Processes affecting the distribution of selenium in shallow ground water of agricultural areas, western San Joaquin Valley, California","indexId":"ofr87220","publicationYear":"1987","noYear":false,"title":"Processes affecting the distribution of selenium in shallow ground water of agricultural areas, western San Joaquin Valley, California"},"predicate":"SUPERSEDED_BY","object":{"id":70014717,"text":"70014717 - 1988 - Processes affecting the distribution of selenium in shallow groundwater of agricultural areas, western San Joaquin Valley, California","indexId":"70014717","publicationYear":"1988","noYear":false,"title":"Processes affecting the distribution of selenium in shallow groundwater of agricultural areas, western San Joaquin Valley, California"},"id":1}],"lastModifiedDate":"2018-09-13T16:12:50","indexId":"70014717","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","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":"Processes affecting the distribution of selenium in shallow groundwater of agricultural areas, western San Joaquin Valley, California","docAbstract":"A study was undertaken to evaluate the processes affecting the chemistry of shallow groundwater associated with agricultural drainage systems in the western San Joaquin Valley, California. The study was prompted by a need for an understanding of selenium mobility in areas having high selenium concentrations in shallow groundwater. Groundwater samples were collected along transects in three artificially drained fields where the age of the drainage system varied (15, 6, and 1.5 years). Selenium concentrations in the drain water also varied (430, 58, and 3700 μg/L, respectively). Isotopic enrichment and chemical composition of the groundwater samples indicate that saline- and selenium-enriched water has evolved as a result of evaporation or transpiration of groundwater. This evaporated, isotopically enriched water is being displaced by more recent, less saline irrigation water percolating through the root zone. This displacement seems to be a process whereby sodium chloride and sodium sulfate water is being replaced by more dilute calcium sulfate and calcium bicarbonate water.","language":"English","publisher":"American Geophysical Union","doi":"10.1029/WR024i004p00516","usgsCitation":"Deverel, S.J., and Fujii, R., 1988, Processes affecting the distribution of selenium in shallow groundwater of agricultural areas, western San Joaquin Valley, California: Water Resources Research, v. 24, no. 4, p. 516-524, https://doi.org/10.1029/WR024i004p00516.","productDescription":"9 p.","startPage":"516","endPage":"524","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"links":[{"id":225791,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"San Joaquin Valley","volume":"24","issue":"4","noUsgsAuthors":false,"publicationDate":"2010-07-09","publicationStatus":"PW","scienceBaseUri":"505a8da9e4b0c8380cd7ed51","contributors":{"authors":[{"text":"Deverel, S. J.","contributorId":65478,"corporation":false,"usgs":true,"family":"Deverel","given":"S.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":369121,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Fujii, Roger rfujii@usgs.gov","contributorId":553,"corporation":false,"usgs":true,"family":"Fujii","given":"Roger","email":"rfujii@usgs.gov","affiliations":[{"id":595,"text":"U.S. Geological Survey","active":false,"usgs":true}],"preferred":false,"id":369120,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ]}