80 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Geochemistry"  
Results: 1 - 24 next
open access

Salinity variations and chemical compositions of waters in the Frio Formation, Texas Gulf Coast. Annual report

Description: Waters produced from sandstone reservoirs of the deep Frio Formation exhibit spatial variations in chemical composition that roughly coincide with the major tectonic elements (Houston and Rio Grande Embayments, San Marcos Arch) and corresponding depositional systems (Houston and Norias deltas, Greta-Carancahua barrier/strandplain system) that were respectively active along the upper, lower, and middle Texas Coast during Frio deposition. Within an area, salinities are usually depth dependent, an… more
Date: November 1, 1981
Creator: Morton, R. A.; Garrett Jr., C. M.; Posey, J. S.; Han, J. H. & Jirik, L. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hot dry rock geothermal reservoir testing: 1978 to 1980

Description: Experimental results and re-evaluation of the Phase I Hot Dry Rock Geothermal Energy reservoirs at the Fenton Hill field site are summarized. This report traces reservoir growth as demonstrated during Run Segments 2 through 5 (January 1978 to December 1980). Reservoir growth was caused not only by pressurization and hydraulic fracturing, but also by heat extraction and thermal contraction effects. Reservoir heat-transfer area grew from 8000 to 50,000 m/sup 2/ and reservoir fracture volume grew … more
Date: November 1, 1981
Creator: Dash, Z.V.; Murphy, H.D. & Cremer, G.M. (eds.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Icelandic basaltic geothermal field: A natural analog for nuclear waste isolation in basalt

Description: Analog studies of Icelandic geothermal fields have shown that the design of nuclear waste repositories in basalt can benefit by comparison to the data base already available from the development of these geothermal fields. A high degree of similarity exists between these two systems: their petrology, groundwater geochemistry, mineral solubilities, hydrologic parameters, temperature ranges, water-rock redox equilibria, hydrothermal pH values, and secondary mineralogies all show considerable over… more
Date: November 21, 1984
Creator: Ulmer, G. C. & Grandstaff, D. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

GEOQUÌMICO : an interactive tool for comparing sorption conceptual models (surface complexation modeling verus K[D]).

Description: Within reactive geochemical transport, several conceptual models exist for simulating sorption processes in the subsurface. Historically, the K{sub D} approach has been the method of choice due to ease of implementation within a reactive transport model and straightforward comparison with experimental data. However, for modeling complex sorption phenomenon (e.g. sorption of radionuclides onto mineral surfaces), this approach does not systematically account for variations in location, time, or c… more
Date: November 1, 2007
Creator: Hammond, Glenn E. (Pacific Northwest National Laboratory, Richland, WA) & Cygan, Randall Timothy
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Geophysical survey, Paso Robles geothermal area, California, part of the resource assessment of low- and moderate-temperature geothermal resource areas in California

Description: Some general background information concerning the geology and geothermal occurrences in the Southern Coast Ranges is included, as well as the more detailed information dealing with the Paso Robles area proper. Results for two geophysical methods that have been used in the area: the ground magnetic and gravity surveys, are discussed and interpreted.
Date: November 10, 1980
Creator: Chapman, R. H.; Chase, G. W. & Youngs, L. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Summaries of FY 91 geosciences research

Description: The Department of Energy supports research in the geosciences in order to provide a sound foundation of fundamental knowledge in those areas of the geosciences which are germane to the Department of Energy's many missions. The Division of Engineering and Geosciences, part of the Office of Basic Energy Sciences of the Office of Energy Research supports the Geosciences Research Program. The participants in this program include Department of Energy laboratories, academic institutions, and other go… more
Date: November 1, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

HYDROGEOCHEM: A coupled model of HYDROlogic transport and GEOCHEMical equilibria in reactive multicomponent systems

Description: This report presents the development of a hydrogeochemical transport model for multicomponent systems. The model is designed for applications to proper hydrological setting, accommodation of complete suite of geochemical equilibrium processes, easy extension to deal with chemical kinetics, and least constraints of computer resources. The hydrological environment to which the model can be applied is the heterogeneous, anisotropic, saturated-unsaturated subsurface media under either transient or … more
Date: November 1, 1990
Creator: Yeh, G. T. & Tripathi, V. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Raft River geoscience case study

Description: The Raft River Geothermal Site has been evaluated over the past eight years by the United States Geological Survey and the Idaho National Engineering Laboratory as a moderate-temperature geothermal resource. The geoscience data gathered in the drilling and testing of seven geothermal wells suggest that the Raft River thermal reservoir is: (a) produced from fractures found at the contact metamorphic zone, apparently the base of detached normal faulting from the Bridge and Horse Well Fault zones … more
Date: November 1, 1981
Creator: Dolenc, M. R.; Hull, L. C.; Mizell, S. A.; Russell, B. F.; Skiba, P. A.; Strawn, J. A. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Salton Sea Geothermal Field, California, as a near-field natural analog of a radioactive waste repository in salt

Description: Since high concentrations of radionuclides and high temperatures are not normally encountered in salt domes or beds, finding an exact geologic analog of expected near-field conditions in a mined nuclear waste repository in salt will be difficult. The Salton Sea Geothermal Field, however, provides an opportunity to investigate the migration and retardation of naturally occurring U, Th, Ra, Cs, Sr and other elements in hot brines which have been moving through clay-rich sedimentary rocks for up t… more
Date: November 1, 1983
Creator: Elders, W. A. & Cohen, L. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Dynamics of the continental margins

Description: On 18--20 June 1990, over 70 oceanographers conducting research in the ocean margins of North America attended a workshop in Virginia Beach, Virginia. The purpose of the workshop was to provide the Department of Energy with recommendations for future research on the exchange of energy-related materials between the coastal and interior ocean and the relationship between the ocean margins and global change. The workshop was designed to optimize the interaction of scientists from specific research… more
Date: November 1, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Site characterization report for the basalt waste isolation project. Volume II

Description: The reference location for a repository in basalt for the terminal storage of nuclear wastes on the Hanford Site and the candidate horizons within this reference repository location have been identified and the preliminary characterization work in support of the site screening process has been completed. Fifteen technical questions regarding the qualification of the site were identified to be addressed during the detailed site characterization phase of the US Department of Energy-National Waste… more
Date: November 1, 1982
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Survey of toxicity and carcinogenity of mineral deposits

Description: The toxicities and biogeochemical cycles of arsenic, cadmium, chromium, lead and nickel are reviewed in some detail, and other trace elements briefly mentioned. These heavy metals are used as a framework within which the problem of low-level radioactive waste disposal can be compared. (ACR)
Date: November 3, 1981
Creator: Furst, A. & Harding-Barlow, I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Geochemical modeling of the Raft River geothermal field

Description: The results to date of chemical modeling of the Raft River KGRA are presented. Earlier work indicated a northwest-southeast anomaly in the contours. Modeling techniques applied to more complete data allowed further definition of the anomaly. Models described in this report show the source of various minerals in the geothermal water. There appears to be a regional heat source that gives rise to uniform conductive heat flow in the region, but convective flow is concentrated near the upwelling in … more
Date: November 1, 1979
Creator: Overton, H. L.; Chaney, R. E.; McAtee, R. E. & Graham, D. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Geothermal potential of West-Central New Mexico from geochemical and thermal gradient data

Description: To study the low temperature and Hot Dry Rock (HDR) geothermal potential of west-central New Mexico, 46 water samples were collected and geothermal gradient measurements were made in 29 wells. Water chemistry data indicate that all the samples collected are meteoric waters. High temperatures of samples taken from wells between Gallup and Tohatchi indicate these wells may derive water from a warm aquifer below the depth of the wells. The chemistries of the samples farther south on the Zuni India… more
Date: November 1, 1980
Creator: Levitte, D. & Gambill, D.T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comparative assessment of five potential sites for hydrothermal-magma systems: summary

Description: A comparative assessment of five potential hydrothermal-magma sites for this facet of the Thermal Regimes part of the CSDP has been prepared for the DOE Office of Basic Energy Sciences. The five sites are: The Geysers-Clear Lake, CA, Long Valley, CA, Rio Grande Rift, NM, Roosevelt Hot Springs, UT, and Salton Trough, CA. This site assessment study has drawn together background information (geology, geochemistry, geophysics, and energy transport) on the five sites as a preliminary stage to site s… more
Date: November 1, 1980
Creator: Luth, W.C. & Hardee, H.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Waste isolation safety assessment program. Summary of FY-77 progress

Description: Objective is to provide long-term safety information for the National Waste Terminal Storage Program. Work in FY 77 supported the development of the generic assessment method (release scenario analysis, release consequence analysis) and of the generic data base (waste form release rate data, radionuclide geochemical interaction data). (DLC)
Date: November 1, 1977
Creator: Burkholder, H. C.; Greenborg, J.; Stottlemyre, J. A.; Bradley, D. J.; Raymond, J. R. & Serne, R. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Recommendations report for the platanares geothermal site, Department of Copan, Honduras. Reporte de recomendaciones para el sitio geotermico de platanares, Departamento de Copan, Honduras

Description: A geothermal assessment of six previously identified sites in Honduras has been conducted by a team comprised of staff from the Los Alamos National Laboratory, the US Geological Survey, and the Empresa Nacional de Energia Electrica. The application of both reconnaissance and detailed scale techniques lead to the selection of Platanares in the Department of Copan as the highest potential site. Additional work resulted in the completion of a prefeasibility study at Platanares. We present here a t… more
Date: November 1, 1988
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Instructions for borehole sampling

Description: Geologic systems generally are complex with physical properties and trends that can be difficult to predict. Subsurface geology exerts a fundamental control on groundwater flow and contaminant transport. The primary source for direct observation of subsurface geologic information is a borehole. However, direct observations from a borehole essentially are limited to the diameter and spacing of boreholes and the quality of the information derived from the drilling. Because it is impractical to dr… more
Date: November 11, 1994
Creator: Reynolds, K. D. & Lindsey, K. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Constraints on the affinity term for modeling long-term glass dissolution rates

Description: Predictions of long-term glass dissolution rates are highly dependent on the form of the affinity term in the rate expression. Analysis of the quantitative effect of saturation state on glass dissolution rate for CSG glass (a simple analog of SRL-165 glass), shows that a simple (1-Q/K) affinity term does not match experimental results. Our data at 100{degree}C show that the data is better fit by an affinity term having the form (1 {minus} (Q/K){sup 1}/{sigma}) where {sigma} = 10.
Date: November 1, 1993
Creator: Bourcier, W. L.; Carroll, S. A. & Phillips, B. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Solid earth geosciences research activities at LASL. Progress report, January 1--June 30, 1975

Description: The geoscience group at the Los Alamos Scientific Laboratory (LASL) supports existing geoscience-related programs and conducts a basic research program related to energy and earth resources. Projects supporting the dry hot-rock geothermal energy program include study of drill cores, seismic activity associated with hydraulic fracturing at the drill site, and the thermal state of the Valles Caldera. Research in igneous processes includes the modeling of large-scale volcanic eruptions such as the… more
Date: November 1, 1975
Creator: Heiken, G. (comp.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hanford Laboratories Operation monthly activities report, October 1957

Description: This is the monthly report for the Hanford Laboratories Operation. Metallurgy, reactor fuels, physics and instrumentation, reactor technology, chemistry, separation processes, biology, financial activities, employee relations, laboratories auxiliaries, radiation protection, operation research, inventions, visits, and personnel status are discussed. This report is for October 1957.
Date: November 15, 1957
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Uranium Hydrogeochemical and Stream Sediment Reconnaissance of the Northern Part of the Powder River Basin, Wyoming

Description: During the spring and summer of 1976, 2144 water and water transported sediment samples were collected from 1685 locations spread over an approximate 21 000 km area of the northern end of the Powder River Basin in northeast Wyoming.
Date: November 1977
Creator: Morris, Wayne A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Evaluation of Five Sedimentary Rocks Other Than Salt for Geologic Repository Siting Purposes

Description: The US Department of Energy (DOE), in order to increase the diversity of rock types under consideration by the geologic disposal program, initiated the Sedimary ROck Program (SERP), whose immediate objectiv eis to evaluate five types of secimdnary rock - sandstone, chalk, carbonate rocks (limestone and dolostone), anhydrock, and shale - to determine the potential for siting a geologic repository. The evaluation of these five rock types, together with the ongoing salt studies, effectively result… more
Date: November 15, 2003
Creator: Croff, A. G.; Lomenick, T. F.; Lowrie, R. S. & Stow, S. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

NEPTUNIUM IV AND V SORPTIN TO END-MEMBER SUBSURFACE SEDIMENTS TO THE SAVANNAH RIVER SITE

Description: Migration of Np through the subsurface is expected to be primarily controlled by sorption to sediments. Therefore, understanding and quantifying Np sorption to sediments and sediments from the Savannah River Site (SRS) is vital to ensure safe disposal of Np bearing wastes. In this work, Np sorption to two sediments representing the geological extremes with respect to sorption properties expected in the SRS subsurface environment (named 'subsurface sandy sediment' and 'subsurface clayey sediment… more
Date: November 13, 2009
Creator: Kaplan, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen