Conference Papers
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Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
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Monitoring the hydrologic system for potential effects of geothermal and ground-water development in the Long Valley caldera, Mono County, California, U.S.A
In the early 1980's, renewed interest in the geothermal potential of the Long Valley caldera, California, highlighted the need to balance the benefits of energy development with the established recreational activities of the area. The Long Valley Hydrologic Advisory Committee, formed in 1987, instituted a monitoring program to collect data during the early stages of resource utilization to evaluat
Authors
Christopher Farrar, Daniel Lyster
Mudflow rheology in a vertically rotating flume
Joint research by the U.S. Geological Survey and the University of Missouri-Rolla currently (1990) is being conducted on a 3.05 meters in diameter vertically rotating flume used to simulate mudflows under steady-state conditions. Observed mudflow simulations indicate flow patterns in the flume are similar to those occurring in natural mudflows. Variables such as mean and surface velocity, depth, a
Authors
Robert R. Holmes, Jerome A. Westphal, Harvey E. Jobson
Multidisciplinary hydrologic investigations at Yucca Mountain, Nevada
Future climatic conditions and tectonic processes have the potential to cause significant changes of the hydrologic system in the southern Great Basin, where a nuclear-waste repository is proposed for construction above the water table at Yucca Mountain, Nevada. Geothermal anomalies in the vicinity of Yucca Mountain probably result from the local and regional transport of heat by ground-water flow
Authors
William W. Dudley
Multielement extraction system for determining 19 trace elements in gold exploration samples
A multielement extraction system is being used successfully to provide essentially interference-free geochemical analyses to aid in gold exploration. The Methyl isobutyl ketone-Amine synerGistic Iodide Complex (MAGIC) extraction system separates Ag, As, Au, Bi, Cd, Cu, Ga, Hg, In, Mo, Pb, Pd, Pt, Sb, Se, Sn, Te, Tl, and Zn from interfering geological matrices. Quantitative extraction of these elem
Authors
J. Robert Clark, John G. Viets
Natural sources of greenhouse gases: carbon dioxide emissions from volcanoes
Volcanic degassing of carbon dioxide plays an important role in keeping the atmosphere-ocean portion of the carbon geochemical cycle in balance. The atmosphere-ocean carbon deficit requires replenishment of 6??1012 mol CO2/yr, and places an upper limit on the output of carbon dioxide from volcanoes. The CO2 output of the global mid-oceanic ridge system is ca. 0.7??1012 mol/yr, thus supplying only
Authors
Terrence Gerlach
New geologic map of the Island of Hawaii
Recent geologic mapping on the Island of Hawaii is compiled in a detailed new 1:100,000-scale geologic map. The lava flows and pyroclastic deposits of each volcano are assigned to major lithostratigraphic units based on lithology and stratigraphic relations. However, the emphasis of the map is strongly chronostratigraphic. Lavas of latest Pleistocene and Holocene age, which form almost all of the
Authors
Edward Wolfe, Jean Morris
Nonspecific immuno-prophylaxis in carp (Cyprinus carpio)
No abstract available at this time.
Authors
A.K. Siwicki, D. P. Anderson
Numerical simulation of hydrothermal circulation in the Cascade Range, north-central Oregon
Alternate conceptual models to explain near-surface heat-flow observations in the central Oregon Cascade Range involve (1) an extensive mid-crustal magmatic heat source underlying both the Quaternary arc and adjacent older rocks or (2) a narrower deep heat source which is flanked by a relatively shallow conductive heat-flow anomaly caused by regional ground-water flow (the lateral-flow model). Rel
Authors
S. E. Ingebritsen, K.M. Paulson
Observation of sediment resuspension in Old Tampa Bay, Florida
Equipment and methodology have been developed to monitor sediment resuspension at two sites in Old Tampa Bay. Velocities are measured with electromagnetic current meters and suspended solids and turbidity are monitored with optical backscatterance sensors. In late November 1989, a vertical array of instrument pairs was deployed from a permanent platform at a deep-water site, and a submersible inst
Authors
David H. Schoellhamer
Oil-shale data, cores, and samples collected by the U.S. geological survey through 1989
The U.S. Geological Survey has acquired a large collection of geotechnical data, drill cores, and crushed samples of oil shale from the Eocene Green River Formation in Colorado, Wyoming, and Utah. The data include about 250,000 shale-oil analyses from about 600 core holes. Most of the data is from Colorado where the thickest and highest-grade oil shales of the Green River Formation are found in th
Authors
John R. Dyni, Frances Gay, Thomas C. Michalski
Origin of carbonate deposits in the vicinity of Yucca Mountain, Nevada. Preliminary results of strontium-isotope analyses
As part of the paleohydrology study of the Yucca Mountain Project, strontium-isotope analyses of carbonate deposits, ground water, and major rock reservoirs of strontium are in progress. This paper presents a summary of the strontium-isotope data obtained through 1989. Calcium carbonate is ubiquitous in the vicinity of Yucca Mountain, where it occurs as pedogenic horizons and rhizoliths, small vei
Authors
B.D. Marshall, K. Futa, S. A. Mahan, Z. E. Peterman, J. S. Stuckless, J. S. Downey, E. D. Gutentag
Origins of water and solutes in and north of the Norris-Mammoth Corridor, Yellowstone National Park
This study was initiated to investigate the impacts of geothermal development in the Corwin Springs Known Geothermal Resources Area (KGRA) on the hydrothermal features of Yellowstone National Park. To determine possible hydrogeochemical connections, we used the diagnostic stable and radioactive isotopes of several elements, and the chemical and gas compositions of thermal and cold waters from the
Authors
Yousif Kharaka, Robert Mariner, Gil Ambats, William Evans, Lloyd White, Thomas Bullen, B. Mack Kennedy