Publications
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Investigation of the potential for concealed base-metal mineralization at the Drenchwater Creek Zn-Pb-Ag occurrence, northern Alaska, using geology, reconnaissance geochemistry, and airborne electromagnetic geophysics
In 2005, the U.S. Geological Survey, Bureau of Land Management, and State of Alaska cooperated on an investigation of the mineral potential of a southern part of the National Petroleum Reserve in Alaska, Howard Pass quadrangle, to provide background information for future land-use decisions. The investigation incorporated an airborne electromagnetic (EM) survey covering 1,500 mi2 (~3,900 km2), inc
Authors
Garth E. Graham, Maria Deszcz-Pan, Jared E. Abraham, Karen D. Kelley
Assessment of undiscovered oil and gas resources of Libya and Tunisia, 2010
Using a geology-based assessment methodology, the U.S. Geological Survey estimated means of 3.97 billion barrels of undiscovered oil, 38.5 trillion cubic feet of undiscovered natural gas, and 1.47 billion barrels of undiscovered natural gas liquids in two provinces of North Africa.
Authors
Katherine J. Whidden, Michael Lewan, Christopher J. Schenk, Rondald R. Charpentier, Troy A. Cook, Timothy R. Klett, Janet K. Pitman
CRevolution 2—Origin and evolution of the Colorado River system, workshop abstracts
A 2010 Colorado River symposium, held in Flagstaff, Arizona, involved 70 participants who engaged in intense debate about the origin and evolution of the Colorado River system. This symposium, built upon two previous decadal scientific meetings, focused on forging scientific consensus, where possible, while articulating continued controversies regarding the Cenozoic evolution of the Colorado River
Assessment of coal geology, resources, and reserves in the Southwestern Powder River Basin, Wyoming
The availability of abundant new borehole data from recent coal bed natural gas development was utilized by the U.S. Geological Survey for a comprehensive evaluation of coal resources and reserves in the southwestern part of the Powder River Basin in Wyoming. This report on the Southwestern Powder River Basin assessment area represents the third area within the basin to be assessed, the first bein
Authors
Lee M. Osmonson, David C. Scott, Jon E. Haacke, James A. Luppens, Paul E. Pierce
Rare earth element mineralogy, geochemistry, and preliminary resource assessment of the Khanneshin carbonatite complex, Helmand Province, Afghanistan
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Authors
Robert D. Tucker, Harvey E. Belkin, Klaus J. Schulz, Stephen G. Peters, Kim P. Buttleman
Assessment of potential shale gas and shale oil resources of the Norte Basin, Uruguay, 2011
Using a performance-based geological assessment methodology, the U.S. Geological Survey estimated mean volumes of 13.4 trillion cubic feet of potential technically recoverable shale gas and 0.5 billion barrels of technically recoverable shale oil resources in the Norte Basin of Uruguay.
Authors
Christopher J. Schenk, Mark A. Kirschbaum, Ronald R. Charpentier, Troy Cook, Timothy R. Klett, Donald L. Gautier, Richard M. Pollastro, Jean N. Weaver, Michael Brownfield
Measured reflectance suppressed by thin-film interference of crude oil smeared on glass - as on vitrinite in coal or petroliferous rocks
The tool of measuring "vitrinite reflectance" under a microscope has great value in petroleum exploration and coal utilization, and the reflectance is a simple number, such as 1.4% Ro, with some slight variations depending on technique. Sample collection, preparation and measurement are simple and many sedimentary rocks yield vitrinite. However, the reported number can lead one astray if its or
Authors
Neely Bostick
Limnogeology in Brazil's "forgotten wilderness": A synthesis from the large floodplain lakes of the Pantanal
Sediment records from floodplain lakes have a large and commonly untapped potential for inferring wetland response to global change. The Brazilian Pantanal is a vast, seasonally inundated savanna floodplain system controlled by the flood pulse of the Upper Paraguay River. Little is known, however, about how floodplain lakes within the Pantanal act as sedimentary basins, or what influence hydroclim
Authors
Michael M. McGlue, Aguinaldo Silva, Fabricio A. Corradini, Hiran Zani, Mark A. Trees, Geoffrey S. Ellis, Mauro Parolin, Peter W. Swarzenski, Andrew S. Cohen, Mario L. Assine
A critical review of published coal quality data from the southwestern part of the Powder River Basin, Wyoming
A review of publicly available coal quality data during the coal resource assessment of the southwestern part of the Powder River Basin, Wyoming (SWPRB), revealed significant problems and limitations with those data. Subsequent citations of data from original sources often omitted important information, such as moisture integrity and information needed to evaluate the issue of representativeness.
Authors
James A. Luppens
Oil shale resources of the Eocene Green River Formation, Greater Green River Basin, Wyoming, Colorado, and Utah
The U.S. Geological Survey (USGS) recently completed a comprehensive assessment of in-place oil in oil shales in the Eocene Green River in the Greater Green River Basin, Wyoming, Colorado, and Utah. This CD-ROM includes reports, data, and an ArcGIS project describing the assessment. A database was compiled that includes about 47,000 Fischer assays from 186 core holes and 240 rotary drill holes. Mo
Authors
Gas, oil, and water production from Wattenberg Field in the Denver Basin, Colorado
Gas, oil, and water production data were compiled from selected wells in two tight gas reservoirs-the Codell-Niobrara interval, comprised of the Codell Sandstone Member of the Carlile Shale and the Niobrara Formation; and the Dakota J interval, comprised mostly of the Muddy (J) Sandstone of the Dakota Group; both intervals are of Cretaceous age-in the Wattenberg field in the Denver Basin of Colora
Authors
Philip H. Nelson, Stephen L. Santus
Constraining the age and magnitude of uplift in the northern National Petroleum Reserve in Alaska (NPRA): Apatite fission-track analysis of samples from three wells
A broad, post-mid-Cretaceous uplift is defined in the northern National Petroleum Reserve in Alaska (NPRA) by regional truncation of Cretaceous strata, thermal maturity patterns, and amounts of exhumation estimated from sonic logs. Apatite fission-track (AFT) analysis of samples from three wells (South Meade No. 1, Topagoruk No. 1, and Ikpikpuk No. 1) across the eastern flank of the uplift indicat
Authors
David W. Houseknecht, Kenneth J. Bird, Paul O'Sullivan