Local-area-enhanced, 2.5-meter resolution natural-color and color-infrared satellite-image mosaics of the Kharnak-Kanjar mineral district in Afghanistan: Chapter K in Local-area-enhanced, high-resolution natural-color and color-infrared satellite-image mosaics of mineral districts in Afghanistan
Philip A. Davis, Scott A. Arko, Michelle L. Harbin
2012, Data Series 709-K
The U.S. Geological Survey (USGS), in cooperation with the U.S. Department of Defense Task Force for Business and Stability Operations, prepared databases for mineral-resource target areas in Afghanistan. The purpose of the databases is to (1) provide useful data to ground-survey crews for use in performing detailed assessments of the...
Local-area-enhanced, 2.5-meter resolution natural-color and color-infrared satellite-image mosaics of the Tourmaline mineral district in Afghanistan: Chapter J in Local-area-enhanced, high-resolution natural-color and color-infrared satellite-image mosaics of mineral districts in Afghanistan
Philip A. Davis, Laura E. Cagney, Scott A. Arko, Michelle L. Harbin
2012, Data Series 709-J
The U.S. Geological Survey (USGS), in cooperation with the U.S. Department of Defense Task Force for Business and Stability Operations, prepared databases for mineral-resource target areas in Afghanistan. The purpose of the databases is to (1) provide useful data to ground-survey crews for use in performing detailed assessments of the...
Occurrence model for volcanogenic beryllium deposits
Nora K. Foley, Albert H. Hofstra, David A. Lindsey, Robert R. Seal II, Brian W. Jaskula, Nadine M. Piatak
2012, Scientific Investigations Report 2010-5070-F
Current global and domestic mineral resources of beryllium (Be) for industrial uses are dominated by ores produced from deposits of the volcanogenic Be type. Beryllium deposits of this type can form where hydrothermal fluids interact with fluorine and lithophile-element (uranium, thorium, rubidium, lithium, beryllium, cesium, tantalum, rare earth elements, and...
Local-area-enhanced, 2.5-meter resolution natural-color and color-infrared satellite-image mosaics of the Zarkashan mineral district in Afghanistan: Chapter G in Local-area-enhanced, high-resolution natural-color and color-infrared satellite-image mosaics of mineral districts in Afghanistan
Philip A. Davis, Laura E. Cagney
2012, Data Series 709-G
The U.S. Geological Survey (USGS), in cooperation with the U.S. Department of Defense Task Force for Business and Stability Operations, prepared databases for mineral-resource target areas in Afghanistan. The purpose of the databases is to (1) provide useful data to ground-survey crews for use in performing detailed assessments of the...
Evolution of the chemistry of Fe bearing waters during CO2 degassing
J.N. Geroni, C.A. Cravotta III, D.J. Sapsford
2012, Applied Geochemistry (27) 2335-2347
The rates of Fe(II) oxidation and precipitation from groundwater are highly pH dependent. Elevated levels of dissolved CO2 can depress pH and cause difficulty in removing dissolved Fe and associated metals during treatment of ferruginous water. This paper demonstrates interdependent changes in pH, dissolved inorganic C species, and Fe(II) oxidation...
Magnesium compounds
D.A. Kramer
2012, Mining Engineering (64) 73-74
Seawater and natural brines accounted for about 57 percent of magnesium compounds produced in the United States in 2011. Dead-burned magnesia was produced by Martin Marietta Magnesia Specialties LLC from well brines in Michigan. Caustic-calcined magnesia was recovered from seawater by Premier Magnesia LLC in Florida, from well brines in...
A brief review of the construction aggregates market
Jason Christopher Willett
2012, Stone, Sand & Gravel Review (2012) 25-27
The U.S. Geological Survey defines the construction aggregates industry as those companies that mine and process crushed stone and/or construction sand and gravel. Aggregates have been used from the earliest times of our civilization for a variety of purposes - construction being the major use. As construction aggregates, crushed stone...
Geologic processes influence the effects of mining on aquatic ecosystems
Travis S. Schmidt, William H. Clements, Richard B. Wanty, Philip L. Verplanck, Stan E. Church, Carma A. San Juan, David L. Fey, Barnaby W. Rockwell, Ed H. DeWitt, Terry L. Klein
2012, Ecological Applications (22) 870-879
Geologic processes strongly influence water and sediment quality in aquatic ecosystems but rarely are geologic principles incorporated into routine biomonitoring studies. We test if elevated concentrations of metals in water and sediment are restricted to streams downstream of mines or areas that may discharge mine wastes. We surveyed 198 catchments...
Mineral resource of the month: dimension stone
Thomas P. Dolley
2012, Earth (57) 65-65
The article offers information on dimension stone (DS) that are quarried as natural rock for a specific size and dimension chosen for its color, strength, durability. Varieties of metamorphic, igneous or sedimentary rocks are used but DS rocks are mainly marble, granite and slate that can be found from Maine...
The ICDP Snake River Geothermal Drilling Project: preliminary overview of borehole geophysics
Douglas R. Schmitt, Lee M. Liberty, James E. Kessler, Jochem Kuck, Randolph Kofman, Ross Bishop, John W. Shervais, James P. Evans, Duane E. Champion
2012, Geothermal Resources Council Transactions (36) 1017-1022
Hotspot: The Snake River Geothermal Drilling Project was undertaken to better understand the geothermal systems in three locations across the Snake River Plain with varying geological and hydrological structure. An extensive series of standard and specialized geophysical logs were obtained in each of the wells. Hydrogen-index neutron and γ-γ density...
Landslide inventory maps of the Gales Creek quadrangle, Washington County, Oregon
W. J. Burns, S. Duplantis, K. A. Mickelson, J. M. Spritzer, Ray Wells
2012, Interactive Map Series 46
No abstract available....
Basin thickness variations at the Junction of the Eastern California Shear Zone and the San Bernardino Mountains, California: How thick could the Pliocene sections be?
Victoria E. Langenheim, Tammy L. Surko, Phillip A. Armstrong, Jonathan C. Matti
2012, Conference Paper, Searching for the Pliocene: southern exposures, Annual Desert Symposium Proceedings
We estimate the thickness of Neogene basin fill along the junction of the Eastern California Shear Zone and the North Frontal thrust system of the San Bernardino Mountains using gravity data with geologic and well log constraints. The geometry of the basin fill is of interest for groundwater assessment and location of potential...
Mineralogy and environmental geochemistry of historical iron slag, Hopewell Furnace National Historic Site, Pennsylvania, USA
Nadine M. Piatak, Robert R. Seal
2012, Applied Geochemistry (27) 623-643
The Hopewell Furnace National Historic Site in southeastern Pennsylvania, which features an Fe smelter that was operational in the 18th and 19th centuries, is dominated by three slag piles. Pile 1 slag, from the Hopewell Furnace, and pile 2 slag, likely from the nearby Cornwall Furnace, were both produced...
The crustal magma storage system of Volcán Quizapu, Chile, and the effects of magma mixing on magma diversity
George W. Bergantz, Kari M. Cooper, Edward Hildreth, Phillipp Ruprecht
2012, Journal of Petrology (53) 801-840
Crystal zoning as well as temperature and pressure estimates from phenocryst phase equilibria are used to constrain the architecture of the intermediate-sized magmatic system (some tens of km3) of Volcán Quizapu, Chile, and to document the textural and compositional effects of magma mixing. In contrast to most arc magma systems,...
Porphyry copper assessment of the Mesozoic of East Asia: China, Vietnam, North Korea, Mongolia, and Russia: Chapter G in Global mineral resource assessment
Steve Ludington, Mark J. Mihalasky, Jane M. Hammarstrom, Gilpin R. Robinson Jr., Thomas P. Frost, Kathleen D. Gans, Thomas D. Light, Robert J. Miller, Dmitriy V. Alexeiev
2012, Scientific Investigations Report 2010-5090-G
The U.S. Geological Survey (USGS) collaborated with the China Geological Survey (CGS) to conduct a mineral resource assessment of Mesozoic porphyry copper deposits in East Asia. This area hosts several very large porphyry deposits, exemplified by the Dexing deposit in eastern China that contains more than 8,000,000 metric tons of...
Contemporary seismicity in and around the Yakima-Fold-and-Thrust Belt in eastern Washington
J. Gomberg, B. Sherrod, M. Trautman, E. Burns, Diane Snyder
2012, Bulletin of the Seismological Society of America (102) 309-320
We examined characteristics of routinely cataloged seismicity from 1970 to the present in and around the Yakima fold‐and‐thrust belt (YFTB) in eastern Washington to determine if the characteristics of contemporary seismicity provide clues about regional‐scale active tectonics or about more localized, near‐surface processes. We employed new structural and hydrologic models...
Hydrologic and geochemical data collected near Skewed Reservoir, an impoundment for coal-bed natural gas produced water, Powder River Basin, Wyoming
Richard W. Healy, Cynthia A. Rice, Timothy T. Bartos
2012, Data Series 715
The Powder River Structural Basin is one of the largest producers of coal-bed natural gas (CBNG) in the United States. An important environmental concern in the Basin is the fate of groundwater that is extracted during CBNG production. Most of this produced water is disposed of in unlined surface impoundments....
Porphyry copper assessment of the Tibetan Plateau, China: Chapter F in Global mineral resource assessment
Steve Ludington, Jane M. Hammarstrom, Gilpin R. Robinson Jr., John L. Mars, Robert J. Miller
2012, Scientific Investigations Report 2010-5090-F
The U.S. Geological Survey collaborated with the China Geological Survey to conduct a mineral-resource assessment of resources in porphyry copper deposits on the Tibetan Plateau in western China. This area hosts several very large porphyry deposits, exemplified by the Yulong and Qulong deposits, each containing at least 7,000,000 metric tons...
Carbon stocks across a chronosequence of thinned and unmanaged red pine (Pinus resinosa) stands
Matthew D. Powers, Randall K. Kolka, John B. Bradford, Brian J. Palik, Shawn Fraver, Martin F. Jurgensen
2012, Ecological Applications (22) 1297-1307
Forests function as a major global C sink, and forest management strategies that maximize C stocks offer one possible means of mitigating the impacts of increasing anthropogenic CO2 emissions. We studied the effects of thinning, a common management technique in many forest types, on age-related trends in C stocks using...
Sixty thousand years of magmatic volatile history before the caldera-forming eruption of Mount Mazama, Crater Lake, Oregon
Heather M. Wright, Charles R. Bacon, Jorge A. Vazquez, Thomas W. Sisson
2012, Contributions to Mineralogy and Petrology (164) 1027-1052
The well-documented eruptive history of Mount Mazama, Oregon, provides an excellent opportunity to use pre-eruptive volatile concentrations to study the growth of an explosive silicic magmatic system. Melt inclusions (MI) hosted in pyroxene and plagioclase crystals from eight dacitic–rhyodacitic eruptive deposits (71–7.7 ka) were analyzed to determine variations in volatile-element...
High-resolution tephrochronology of the Wilson Creek Formation (Mono Lake, California) and Laschamp event using 238U-230Th SIMS dating of accessory mineral rims
Jorge A. Vazquez, Marsha I. Lidzbarski
2012, Earth and Planetary Science Letters (357-358) 54-67
Sediments of the Wilson Creek Formation surrounding Mono Lake preserve a high-resolution archive of glacial and pluvial responses along the eastern Sierra Nevada due to late Pleistocene climate change. An absolute chronology for the Wilson Creek stratigraphy is critical for correlating the paleoclimate record to other archives in the western...
Montana Valley and Foothill Prairies Ecoregion: Chapter 6 in Status and trends of land change in the Western United States--1973 to 2000
Janis L. Taylor
2012, Professional Paper 1794-A-6
The Montana Valley and Foothill Prairies Ecoregion comprises numerous intermountain valleys and low-elevation foothill prairies spread across the western half of Montana, on both sides of the Continental Divide (Omernik, 1987; U.S. Environmental Protection Agency, 1997). The ecoregion, which covers approximately 64,658 km2 (24,965 mi2), includes the Flathead Valley and...
Local-area-enhanced, 2.5-meter resolution natural-color and color-infrared satellite-image mosaics of the North Takhar mineral district in Afghanistan: Chapter D in Local-area-enhanced, high-resolution natural-color and color-infrared satellite-image mosaics of mineral districts in Afghanistan
Philip A. Davis, Laura E. Cagney
2012, Data Series 709-D
The U.S. Geological Survey (USGS), in cooperation with the U.S. Department of Defense Task Force for Business and Stability Operations, prepared databases for mineral-resource target areas in Afghanistan. The purpose of the databases is to (1) provide useful data to ground-survey crews for use in performing detailed assessments of the...
Cenozoic tectono-thermal history of the Tordrillo Mountains, Alaska: Paleocene-Eocene ridge subduction, decreasing relief, and late Neogene faulting
Jeff A. Benowitz, Peter J. Haeussler, Paul W. Layer, Paul B. O'Sullivan, Wes K. Wallace, Robert J. Gillis
2012, Geochemistry, Geophysics, Geosystems (13)
Topographic development inboard of the continental margin is a predicted response to ridge subduction. New thermochronology results from the western Alaska Range document ridge subduction related orogenesis. K-feldspar thermochronology (KFAT) of bedrock samples from the Tordrillo Mountains in the western Alaska Range complement existing U-Pb, 40Ar/39Ar and AFT (apatite fission track)...
Global exploration and production capacity for platinum-group metals from 1995 through 2015
David R. Wilburn
2012, Scientific Investigations Report 2012-5164
Platinum-group metals (PGMs) are required in a variety of commercial, industrial, and military applications for many existing and emerging technologies, yet the United States is highly dependent on foreign sources of PGMs. Information on global exploration for PGMs since 1995 has been used in this study as a basis for...
