Publications
Products (journal articles, reports, fact sheets) authored by current and past scientists are listed below. Please check the USGS Pubs Warehouse for other USGS publications.
Filter Total Items: 2018
Noble gas geochemistry investigation of high CO2 natural gas at the LaBarge Platform, Wyoming, USA Noble gas geochemistry investigation of high CO2 natural gas at the LaBarge Platform, Wyoming, USA
A regional sampling of gases from thermal springs near the LaBarge Field, Wyoming, USA to determine the extent of the total carbon dioxide system (TCDS) indicates that the system may extend up to 70 km to the northwest of the field. Geochemical evidence from noble gas isotopes, stable element isotopes, and gas composition provide the foundation for these conclusions. Samples from Soda...
Authors
Matthew D. Merrill, Andrew G. Hunt, Celeste D. Lohr
Sampling considerations in the mining environment Sampling considerations in the mining environment
No abstract available.
Authors
Kathleen S. Smith, Virginia T. McLemore, Carol C. Russell
Data management, assessment, and analysis for decision-making Data management, assessment, and analysis for decision-making
No abstract available.
Authors
Carol C. Russell, Kathleen S. Smith, Virginia T. McLemore
Decision making, risk, and uncertainty Decision making, risk, and uncertainty
No abstract available.
Authors
Carol C. Russell, Kathleen S. Smith, Virginia T. McLemore
Sampling and monitoring program implementation Sampling and monitoring program implementation
No abstract available.
Authors
Carol C. Russell, Virginia T. McLemore, Kathleen S. Smith
Geochemistry of a marine phosphate deposit: A signpost to phosphogenesis Geochemistry of a marine phosphate deposit: A signpost to phosphogenesis
The Permian age Phosphoria Formation in southeastern Idaho and adjoining states represents possibly the largest marine phosphate deposit in the world. The Meade Peak Member, which contains the highest concentrations and amount of carbonate fluorapatite in the formation, was not significantly altered by mechanical reworking during deposition or subsequently by chemical weathering. Thus...
Authors
David Z. Piper, R.B. Perkins
Multielevation calibration of frequency-domain electromagnetic data Multielevation calibration of frequency-domain electromagnetic data
Systematic calibration errors must be taken into account because they can substantially impact the accuracy of inverted subsurface resistivity models derived from frequency-domain electromagnetic data, resulting in potentially misleading interpretations. We have developed an approach that uses data acquired at multiple elevations over the same location to assess calibration errors. A...
Authors
Burke J. Minsley, M. Andy Kass, Greg Hodges, Bruce D. Smith
Science applications of a multispectral microscopic imager for the astrobiological exploration of Mars Science applications of a multispectral microscopic imager for the astrobiological exploration of Mars
Future astrobiological missions to Mars are likely to emphasize the use of rovers with in situ petrologic capabilities for selecting the best samples at a site for in situ analysis with onboard lab instruments or for caching for potential return to Earth. Such observations are central to an understanding of the potential for past habitable conditions at a site and for identifying samples...
Authors
Jorge Nunez, Jack Farmer, R. Glenn Sellar, Gregg A. Swayze, Diana L. Blaney
Uranium–Lead dating, opal Uranium–Lead dating, opal
No abstract available.
Authors
Leonid A. Neymark
Geophysical interpretation of U, Th, and rare earth element mineralization of the Bokan Mountain peralkaline granite complex, Prince of Wales Island, southeast Alaska Geophysical interpretation of U, Th, and rare earth element mineralization of the Bokan Mountain peralkaline granite complex, Prince of Wales Island, southeast Alaska
A prospectivity map for rare earth element (REE) mineralization at the Bokan Mountain peralkaline granite complex, Prince of Wales Island, southeastern Alaska, was calculated from high-resolution airborne gamma-ray data. The map displays areas with similar radioelement concentrations as those over the Dotson REE-vein-dike system, which is characterized by moderately high %K, eU, and eTh...
Authors
Anne E. McCafferty, Douglas B. Stoeser, Bradley S. Van Gosen
Mapping advanced argillic alteration at Cuprite, Nevada, using imaging spectroscopy Mapping advanced argillic alteration at Cuprite, Nevada, using imaging spectroscopy
Mineral maps based on Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) data were used to study late Miocene advanced argillic alteration at Cuprite, Nevada. Distributions of Fe-bearing minerals, clays, micas, sulfates, and carbonates were mapped using the Tetracorder spectral-shape matching system. The Al content of white micas increases toward altered areas and near intrusive...
Authors
Gregg A. Swayze, Roger N. Clark, Alexander F.H. Goetz, K. Eric Livo, George N. Breit, Fred A. Kruse, Stephen J. Sutley, Lawrence W. Snee, Heather A. Lowers, James L. Post, Roger E. Stoffregen, Roger P. Ashley
Thermochronology of Cretaceous batholithic rocks in the northern Peninsular Ranges batholith, southern California: Implications for the Late Cretaceous tectonic evolution of southern California Thermochronology of Cretaceous batholithic rocks in the northern Peninsular Ranges batholith, southern California: Implications for the Late Cretaceous tectonic evolution of southern California
The thermochronology for several suites of Mesozoic metamorphic and plutonic rocks collected throughout the northern Peninsular Ranges batholith (PRB) was studied as part of a collaborative isotopic study to further our understanding of the magmatic and tectonic history of southern California. These sample suites include: a traverse through the plutonic rocks across the northern PRB (N =...
Authors
Daniel P. Miggins, Wayne R. Premo, Lawrence W. Snee, Ross Yeoman, Nancy D. Naeaer, Charles W. Naeser, Douglas M. Morton