Publications
Listed below are publication products directly associated with the Geology, Energy & Minerals Science Center:
Filter Total Items: 1261
Virginia aeromagnetic and gravity maps and data: A web site for distribution of data Virginia aeromagnetic and gravity maps and data: A web site for distribution of data
No abstract available.
Authors
Stephen L. Snyder
U-Pb zircon ages and Pb isotope geochemistry of gold deposits in the Carolina slate belt of South Carolina U-Pb zircon ages and Pb isotope geochemistry of gold deposits in the Carolina slate belt of South Carolina
Volcanic rocks of the Persimmon Fork Formation host the largest known gold mines of the Carolina slate belt. U-Pb (SHRIMP) zircon ages have been obtained from rocks closely associated with pyrite-enargite-gold deposits at Brewer (quartz-topaz rhyolite breccia from the argillic alteration zone in the Brewer pit and felsic ash-flow tuff from the quartz sericite alteration zone), from the
Authors
Robert A. Ayuso, Joseph L. Wooden, Nora K. Foley, Robert R. Seal, A. Krishna Sinha
Secondary sulfate minerals associated with acid drainage in the eastern US: Recycling of metals and acidity in surficial environments Secondary sulfate minerals associated with acid drainage in the eastern US: Recycling of metals and acidity in surficial environments
Weathering of metal-sulfide minerals produces suites of variably soluble efflorescent sulfate salts at a number of localities in the eastern United States. The salts, which are present on mine wastes, tailings piles, and outcrops, include minerals that incorporate heavy metals in solid solution, primarily the highly soluble members of the melanterite, rozenite, epsomite, halotrichite...
Authors
J. M. Hammarstrom, R.R. Seal, A. L. Meier, J.M. Kornfeld
Geochemistry and jasper beds from the Ordovician Løkken ophiolite, Norway: origin of proximal and distal siliceous exhalites Geochemistry and jasper beds from the Ordovician Løkken ophiolite, Norway: origin of proximal and distal siliceous exhalites
Stratiform beds of jasper (hematitic chert), composed essentially of SiO2 (69–95 wt %) and Fe2O3 (3–25 wt %), can be traced several kilometers along strike in the Ordovician Løkken ophiolite, Norway. These siliceous beds are closely associated with volcanogenic massive sulfide (VMS) deposits and are interpreted as sea-floor gels that were deposited by fallout from hydrothermal plumes in...
Authors
Tor Grenne, John F. Slack
Oceanic Pb-isotopic sources of Proterozoic and Paleozoic volcanogenic massive sulfide deposits on Prince of Wales Island and vicinity, southeastern Alaska Oceanic Pb-isotopic sources of Proterozoic and Paleozoic volcanogenic massive sulfide deposits on Prince of Wales Island and vicinity, southeastern Alaska
Volcanogenic massive sulfide (VMS) deposits on Prince of Wales Island and vicinity in southeastern Alaska are associated with Late Proterozoic through Cambrian volcanosedimentary rocks of the Wales Group and with Ordovician through Early Silurian felsic volcanic rocks of the Moira Sound unit (new informal name). The massive sulfide deposits in the Wales Group include the Big Harbor...
Authors
Robert A. Ayuso, Susan M. Karl, John F. Slack, Peter J. Haeussler, Peter E. Bittenbender, Gregory A. Wandless, Anna Colvin
Tar yields from low-temperature carbonization of coal facies from the Powder River Basin, Wyoming, USA Tar yields from low-temperature carbonization of coal facies from the Powder River Basin, Wyoming, USA
Tar yields from low-temperature carbonization correlate with the amount of crypto-eugelinite in samples selected to represent petrographically distinct coal facies of the Wyodak-Anderson coal zone. Tar yields from Fischer Assay range from
Authors
Ronald W. Stanton, Peter D. Warwick, Sharon M. Swanson
A calibration pad facility for gamma-ray spectrometers at the U.S. Geological Survey in Reston, Virginia A calibration pad facility for gamma-ray spectrometers at the U.S. Geological Survey in Reston, Virginia
No abstract available.
Authors
Joseph S. Duval1, Stephen L. Snyder
Geology and nonfuel mineral deposits of Greenland, Europe, Russia, and northern Central Asia Geology and nonfuel mineral deposits of Greenland, Europe, Russia, and northern Central Asia
No abstract available.
Authors
Warren J. Nokleberg, Walter J. Bawiec, Jeff L. Doebrich, Bruce R. Lipin, Robert J. Miller, Greta J. Orris, Michael L. Zientek
Preliminary integrated geologic map databases for the United States: Minnesota, Wisconsin, Michigan, Illinois, and Indiana Preliminary integrated geologic map databases for the United States: Minnesota, Wisconsin, Michigan, Illinois, and Indiana
The growth in the use of Geographic Information Systems (GIS) has highlighted the need for regional and national digital geologic maps attributed with age and lithology information. Such maps can be conveniently used to generate derivative maps for purposes including mineral-resource assessment, metallogenic studies, tectonic studies, and environmental research. This Open-File Report is...
Authors
Suzanne W. Nicholson, Connie L. Dicken, Michael P. Foose, Julie Mueller
Whole rock geochemical data For altered and mineralized rocks, Red Dog Zn-Pb-Ag District, western Brooks Range, Alaska Whole rock geochemical data For altered and mineralized rocks, Red Dog Zn-Pb-Ag District, western Brooks Range, Alaska
No abstract available.
Authors
John F. Slack, Karen D. Kelley, Jeffrey L. Clark
Whole rock geochemical data For paleozoic sedimentary rocks of the western Brooks Range, Alaska Whole rock geochemical data For paleozoic sedimentary rocks of the western Brooks Range, Alaska
No abstract available.
Authors
John F. Slack, Jeanine M. Schmidt, Julie A. Dumoulin
Principal facts for gravity data collected in Wisconsin: A web site and CD-ROM for distribution of data Principal facts for gravity data collected in Wisconsin: A web site and CD-ROM for distribution of data
Principal facts for 40,488 gravity stations covering the entire state of Wisconsin are presented here in digital form. This is a compilation of previously published data collected between 1948 and 1992 from numerous sources, along with over 10,000 new gravity stations collected by the USGS since 1999. Also included are 550 gravity stations from previously unpublished sources. Observed...
Authors
Stephen L. Snyder, Daniel W. Geister, David L. Daniels, C. Patrick Ervin