Publications
Browse recent USGS publications related to energy resources.
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Proposed stratigraphic nomenclature and macroscopic identification of lithostratigraphic units of the Paintbrush Group exposed at Yucca Mountain, Nevada Proposed stratigraphic nomenclature and macroscopic identification of lithostratigraphic units of the Paintbrush Group exposed at Yucca Mountain, Nevada
No abstract available.
Authors
D.C. Buesch, R. W. Spengler, T. C. Moyer, J. K. Geslin
Application of a feedforward neural network in the search for kuroko deposits in the Hokuroku District, Japan Application of a feedforward neural network in the search for kuroko deposits in the Hokuroku District, Japan
A feedforward neural network with one hidden layer and five neurons was trained to recognize the distance to kuroko mineral deposits. Average amounts per hole of pyrite, sericite, and gypsum plus anhydrite as measured by X-rays in 69 drillholes were used to train the net. Drillholes near and between the Fukazawa, Furutobe, and Shakanai mines were used. The training data were selected...
Authors
Donald A. Singer, Ryoichi Kouda
Isopach maps of the Powder River Basin, Montana and Wyoming Isopach maps of the Powder River Basin, Montana and Wyoming
No abstract available.
Authors
J. E. Fox, Debra K. Higley
Structure-contour maps of the Powder River basin, Montana and Wyoming Structure-contour maps of the Powder River basin, Montana and Wyoming
No abstract available.
Authors
J. E. Fox, Debra K. Higley
Assessing the coal resources of the United States Assessing the coal resources of the United States
In 1994, coal production in the United States reached the highest level in history (slightly more than 909 million metric tons or one billion short tons), continuing the upward trend of coal production and utilization that began 34 years ago. Previous assessments of the coal resources of the United States, which were completed as early as 1909, clearly indicated that the total coal...
Authors
Harold J. Gluskoter, R. M. Flores, J. Hatch, M.A. Kirschbaum, L.F. Ruppert, Peter D. Warwick
Sources of the Early Cretaceous plutons in the Turtle and West Riverside Mountains, California Sources of the Early Cretaceous plutons in the Turtle and West Riverside Mountains, California
Ages and initial isotopic ratios of Early Cretaceous (˜100 Ma) plutons of the Cordilleran Interior in the southern Turtle and West Riverside mountains distinguish them from Late Cretaceous plutons in surrounding ranges in the eastern Mojave Desert. Furthermore, the studied plutons have isotopic and geochemical characteristics more similar to plutons of Cretaceous age in the coastal...
Authors
C. M. Allen, J. L. Wooden, Keith A. Howard, D.A. Foster, R. M. Tosdal
The generation of oceanic rhyolites by crystal fractionation: the basalt-rhyolite association at Volcán Alcedo, Galápagos archipelago The generation of oceanic rhyolites by crystal fractionation: the basalt-rhyolite association at Volcán Alcedo, Galápagos archipelago
Alcedo volcano is one of six shield volcanoes on Isabela Island in the western Galápagos Islands. Although Alcedo is dominantiy basaltic, it is unusual in that it also has erupted ∼1 km3 of rhyolite. The rhyolitic phase marked a 10-fold decrease in the mass-eruption rate of the volcano, and the volcano has returned to erupting basalt. The basalts are tholeiitic and range from strongly to...
Authors
Dennis Geist, Keith A. Howard, Peter Larson
Rapid extension recorded by cooling‐age patterns and brittle deformation, Naxos, Greece Rapid extension recorded by cooling‐age patterns and brittle deformation, Naxos, Greece
The metamorphic core complex exposed as the island of Naxos in the Aegean Sea records an unusually complete sequence of structures developed as a result of continental extension. The structures formed during Miocene rise and cooling from ductile, upper amphibolite facies and anatectic conditions to brittle near‐surface conditions beneath the Naxos detachment fault. Top‐to‐the‐north...
Authors
B.E. John, Keith A. Howard
The role of serpentinite melanges in the unroofing of UHPM rocks: An example from the Western Alps of Italy: Chapter 6 The role of serpentinite melanges in the unroofing of UHPM rocks: An example from the Western Alps of Italy: Chapter 6
The ultrahigh pressure metamorphic rocks (UHPM) of the Dora-Maira continental massif are overlain by a stack of oceanic nappes. Metamorphic grade appears to increase downward but with marked discontinuities between each of the nappes, suggesting that section has been removed along the bounding faults. This apparent omission of section is greatest in the lowest oceanic unit where a...
Authors
M. Clark Blake, D.E. Moore, A. S. Jayko
Uraniferous waters of the Arkansas River valley, Colorado, U.S.A.: A function of geology and land use Uraniferous waters of the Arkansas River valley, Colorado, U.S.A.: A function of geology and land use
The effect of local geology and land-use practices on dissolved U was investigated by analysis of surface water and some springs in the Arkansas River valley of southeastern Colorado. Water samples were collected during a 2 week period in April, 1991. The rate of increase of U concentration with distance downriver increased markedly as the river flowed from predominantly undeveloped...
Authors
Robert A. Zielinski, Sigrid Asher-Bolinder, A. L. Meier
A bibliography of Klamath Mountains geology, California and Oregon, listing authors from Aalto to Zucca for the years 1849 to mid-1995 A bibliography of Klamath Mountains geology, California and Oregon, listing authors from Aalto to Zucca for the years 1849 to mid-1995
No abstract available.
Authors
William P. Irwin