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Filter Total Items: 1422
Uptake and transport of heavy metals by heated seawater: A summary of the experimental results Uptake and transport of heavy metals by heated seawater: A summary of the experimental results
In general, the chemistry of seawater experimentally reacted with basalt is in accord with the observed chemistry of the 350°C vent waters from 21°N on the East Pacific Rise. Experiments at 350°C, 500 bar, and a water/rock ratio of ≤10 reproduce most of the major components in the vent waters, in particular the low Mg and SO4 and high Si02, Ca, and K. In comparison with the vent waters...
Authors
Robert J. Rosenbauer, James L. Bischoff
Molecular and isotopic compositions of hydrocarbons at Site 533, Deep Sea Drilling Project Leg 76 Molecular and isotopic compositions of hydrocarbons at Site 533, Deep Sea Drilling Project Leg 76
In an investigation of gas hydrates in deep ocean sediments, gas samples from Deep Sea Drilling Project Site 533 on the Blake Outer Ridge in the northwest Atlantic were obtained for molecular and isotopic analyses. Gas samples were collected from the first successful deployment of a pressure core barrel (PCB) in a hydrate region. The pressure decline curves from two of the four PCB...
Authors
J.M. Brooks, L.A. Barnard, D.A. Wiesenburg, M.C. Kennicutt, Keith A. Kvenvolden
Pressure core barrel; application to the study of gas hydrates, Deep Sea Drilling Project Site 533, Leg 76 Pressure core barrel; application to the study of gas hydrates, Deep Sea Drilling Project Site 533, Leg 76
A pressure core barrel (PCB), developed by the Deep Sea Drilling Project, was used successfully to recover, at in situ pressure, sediments of the Blake Outer Ridge, offshore the southeastern United States. The PCB is a unique, wire-line tool, 10.4 m long, capable of recovering 5.8 m of core (5.8 cm in diameter), maintained at or below in situ pressures of 34.4 million Pascals (MPa), and...
Authors
Keith A. Kvenvolden, D. Cameron
Methane and other hydrocarbon gases in marine sediment Methane and other hydrocarbon gases in marine sediment
No abstract available.
Authors
George E. Claypool, Keith A. Kvenvolden
Concentrations and carbon isotopic compositions of CH4 and CO2 in gas from sediments of the Blake Outer Ridge, Deep Sea Drilling Project Leg 76 Concentrations and carbon isotopic compositions of CH4 and CO2 in gas from sediments of the Blake Outer Ridge, Deep Sea Drilling Project Leg 76
The principal gaseous carbon-containing components identified in the first 400 m of sediment at Deep Sea Drilling Project Site 533, Leg 76, are methane (CH4 ) and carbon dioxide (CO2 ). Below a sub-bottom depth of about 25 m, sedi ment cores commonly contained pockets caused by the expansion of gas upon core recovery. The carbon isotopic com position (δ13C %0 relative to PDB standard) of...
Authors
E.M. Galimov, Keith A. Kvenvolden
Tectonic evolution of Gulf of Anadyr and formation of Anadyr and Navarin basins Tectonic evolution of Gulf of Anadyr and formation of Anadyr and Navarin basins
New seismic reflectionand refraction data reveal that Anadyr basin is separated from Navarin basin by Anadyr ridge, a southeast-northwest-trending bedrock high that is characterized by high-amplitude, short-wavelength magnetic anomalies. Anadyr ridge may be an offshore extension of the melange belt underlying the Koryak Range. Sonobuoy refraction data indicate that the velocity profile...
Authors
Michael S. Marlow, Alan K. Cooper, Jonathan R. Childs
Wandering terranes in southern Alaska: The Aleutia Microplate and implications for the Bering Sea Wandering terranes in southern Alaska: The Aleutia Microplate and implications for the Bering Sea
Paleomagnetic and geological data suggest that much of southern Alaska is a collage of tectonostratigraphic terranes which originated in Mesozoic time at paleolatitudes far south of their present position. The time of ‘docking’ of the terranes against cratonic Alaska is critical to defining their amalgamated size and extent during their northward motion as well as their role in the...
Authors
Michael S. Marlow, Alan K. Cooper
A summary of U.S. Geological Survey marine geologic studies on the inner shelf of the Chukchi Sea, Alaska, 1975 and 1981 A summary of U.S. Geological Survey marine geologic studies on the inner shelf of the Chukchi Sea, Alaska, 1975 and 1981
No abstract available.
Authors
Thomas E. Reiss, R. L. Phillips, R. E. Hunter, P. W. Barnes
Response: Uranium series ages of the Del Mar Man and Sunnyvale skeletons Response: Uranium series ages of the Del Mar Man and Sunnyvale skeletons
No abstract available.
Authors
James L. Bischoff, Robert J. Rosenbauer
Comment and Reply on ‘Geochemistry of amino acids in sediments from Clear Lake, California’: REPLY Comment and Reply on ‘Geochemistry of amino acids in sediments from Clear Lake, California’: REPLY
No abstract available.
Authors
D. Blunt, Keith A. Kvenvolden, John D. Sims
Amino acids in sediments from Leg 68, Site 502 Amino acids in sediments from Leg 68, Site 502
No abstract available.
Authors
Keith A. Kvenvolden, D. Blunt
Leg 84 of the Deep Sea Drilling Project Leg 84 of the Deep Sea Drilling Project
No abstract available.
Authors
J. Aubouin, Roland E. von Huene, M. Baltuck, Robert Arnott, J. Bourgois, M.V. Filewicz, Keith A. Kvenvolden, Barry Leinert, Tom McDonald, Kristin McDougall-Reid, Y. Ogawa, Elliot Taylor, Barbara Winsborough