Publications
Listed below are publication products directly associated with the Geology, Energy & Minerals Science Center:
Filter Total Items: 1250
Climate variability in an estuary: Effects of riverflow on San Francisco Bay Climate variability in an estuary: Effects of riverflow on San Francisco Bay
A simple conceptual model of estuarine variability in the context of climate forcing has been formulated using up to 65 years of estimated mean-monthly delta flow, the cumulative freshwater flow to San Francisco Bay from the Sacramento-San Joaquin River, and salinity observations near the mouth, head, mid-estuary, and coastal ocean. Variations in delta flow, the principal source of...
Authors
David H. Peterson, Daniel R. Cayan, John F. Festa, Frederic H. Nichols, Roy A. Walters, James V. Slack, Stephen E. Hager, Laurence E. Schemel
A reinterpretation of the δDH2O of inclusion fluids in contemporaneous quartz and sphalerite, Creede mining district, Colorodo: a generic problem for shallow orebodies? A reinterpretation of the δDH2O of inclusion fluids in contemporaneous quartz and sphalerite, Creede mining district, Colorodo: a generic problem for shallow orebodies?
Water extracted from fluid inclusions in quartz from shallow epithermal ore deposits often has a hydrogen isotope composition (δD) different from that of water extracted from inclusions in associated minerals. This difference is usually attributed to the involvement of primary fluids from multiple sources. Isotopic and homogenization and freezing temperature determinations on fluid...
Authors
Nora K. Foley, Philip M. Bethke, Robert O. Rye
Remarkable isotopic and trace element trends in potassic through sodic Cretaceous plutons of the Yukon-Koyukuk Basin, Alaska, and the nature of the lithosphere beneath the Koyukuk terrane Remarkable isotopic and trace element trends in potassic through sodic Cretaceous plutons of the Yukon-Koyukuk Basin, Alaska, and the nature of the lithosphere beneath the Koyukuk terrane
During the period from 110 to 80 m.y. ago, a 450-km-long magmatic belt was active along the northern margin of Yukon-Koyukuk basin and on eastern Seward Peninsula. The plutons intruded Upper Jurassic(?) and Lower Cretaceous volcanic arc rocks and Cretaceous sedimentary rocks in Yukon-Koyukuk basin and Proterozoic and lower Paleozoic continental rocks in Seward Peninsula. Within Yukon...
Authors
Joseph G. Arth, Robert E. Criss, Clara C. Zmuda, Nora K. Foley, W. W. Patton, T. P. Miller
Spectrographic analyses of insoluble-residue samples, Joplin 1 degree x 2 degrees quadrangle, Kansas and Missouri : drill hole nos. 30, 31, and 32 Spectrographic analyses of insoluble-residue samples, Joplin 1 degree x 2 degrees quadrangle, Kansas and Missouri : drill hole nos. 30, 31, and 32
No abstract available.
Authors
John H. Bullock, Helen A. Whitney
Spectrographic analyses of insoluble-residue samples, Joplin 1 degree x 2 degrees quadrangle, Kansas and Missouri : drill hole nos. 39, 40, 41, and 42 Spectrographic analyses of insoluble-residue samples, Joplin 1 degree x 2 degrees quadrangle, Kansas and Missouri : drill hole nos. 39, 40, 41, and 42
No abstract available.
Authors
John H. Bullock, Helen A. Whitney
A BASIC program for locating references cited in geoscience manuscripts A BASIC program for locating references cited in geoscience manuscripts
[No abstract available]
Authors
Daniel O. Hayba
Geochemistry of mineralized quartzite beds in the Spokane Formation (Belt Supergroup), Rogers Pass area, Lewis and Clark County, Montana Geochemistry of mineralized quartzite beds in the Spokane Formation (Belt Supergroup), Rogers Pass area, Lewis and Clark County, Montana
No abstract available.
Authors
Jon J. Connor, James M. McNeal
USGS minimum commercially developable field size USGS minimum commercially developable field size
No abstract available.
Authors
Emil D. Attanasi
Pressure sensitivity of low permeability sandstones Pressure sensitivity of low permeability sandstones
Detailed core analysis has been carried out on 32 tight sandstones with permeabilities ranging over four orders of magnitude (0.0002 to 4.8 mD at 5000 psi confining pressure). Relationships between gas permeability and net confining pressure were measured for cycles of loading and unloading. For some samples, permeabilities were measured both along and across bedding planes. Large...
Authors
N.H. Kilmer, N.R. Morrow, Janet K. Pitman
White mica geochemistry of the Catheart Mountain porphyry copper deposit, Maine White mica geochemistry of the Catheart Mountain porphyry copper deposit, Maine
White micas from hydrothermally altered and mineralized zones in the Catheart Mountain Cu-Mo porphyry deposit have regular compositional variations that are generally related to the contents of copper, total iron, and sulfur in the whole rock. Micas in unmineralized rocks exhibit no such relationship. White mica compositions reflect primarily the control imposed by the celadonitic...
Authors
Robert A. Ayuso
Statistics of petroleum exploration in the non-Communist world outside the United States and Canada Statistics of petroleum exploration in the non-Communist world outside the United States and Canada
The search for petroleum has expanded to include most countries in the world. From January 1, 1950, through 1980, about 160,000 crew months were spent in geologic and geophysical exploration in a study area that includes all nonCommunist countries outside the United States and Canada. By the end of 1982, almost 27,000 wildcat wells had been drilled in this study area; these and other pre...
Authors
David H. Root, Emil D. Attanasi, Robert M. Turner
Products of hexachlorocyclopentadiene (C-56) in aqueous solution Products of hexachlorocyclopentadiene (C-56) in aqueous solution
The photodegradation and degradation products of hexachlorocyclopentadiene (C-56) in aqueous solutions were studied in the laboratory. In each case, the half-life of C-56 was less than 4 min when exposed to sunlight. At least eight degradation products were positively or tentatively identified: 2,3,4,4,5-Pentachloro-2-cyclopentenone, hexachloro-2-cyclopentenone and hexachloro-3...
Authors
Sheng-Fu J. Chou, R. A. Griffin, I.-M. Chou, R.A. Larson