Publications
Listed below are publication products directly associated with the Geology, Energy & Minerals Science Center:
Filter Total Items: 1276
Characterization of fly ash from low-sulfur and high-sulfur coal sources: Partitioning of carbon and trace elements with particle size Characterization of fly ash from low-sulfur and high-sulfur coal sources: Partitioning of carbon and trace elements with particle size
Fly ash samples were collected in November and December of 1994, from generating units at a Kentucky power station using high- and low-sulfur feed coals. The samples are part of a two-year study of the coal and coal combustion byproducts from the power station. The ashes were wet screened at 100, 200, 325, and 500 mesh (150, 75, 42, and 25 mu m, respectively). The size fractions were...
Authors
James C. Hower, A.S. Trimble, Cortland F. Eble, Curtis A. Palmer, Allan Kolker
Relation of arsenic, iron, and manganese in ground water to aquifer type, bedrock lithogeochemistry, and land use in the New England coastal basins Relation of arsenic, iron, and manganese in ground water to aquifer type, bedrock lithogeochemistry, and land use in the New England coastal basins
In a study of arsenic concentrations in public-supply wells in the New England Coastal Basins, concentrations at or above 0.005 mg/L (milligrams per liter) were detected in more samples of water from wells completed in bedrock (25 percent of all samples) than in water from wells completed in stratified drift (7.5 percent of all samples). Iron and manganese were detected (at...
Authors
Joseph D. Ayotte, Martha G. Nielsen, Gilpin R. Robinson, Richard B. Moore
Selected geochemical data for the Dillon BLM Resource Area, including the Virginia City mining district, Madison and Beaverhead Counties, southwest Montana : mineral-resource and mineral-environmental considerations Selected geochemical data for the Dillon BLM Resource Area, including the Virginia City mining district, Madison and Beaverhead Counties, southwest Montana : mineral-resource and mineral-environmental considerations
No abstract available.
Authors
Jane Marie Hammarstrom, Bradley S. Van Gosen
Map showing areas with potential for garnet resources in bedrock and placer in the Blacktail Mountains and the Gravelly, Greenhorn, Ruby, and Snowcrest ranges of southwestern Montana Map showing areas with potential for garnet resources in bedrock and placer in the Blacktail Mountains and the Gravelly, Greenhorn, Ruby, and Snowcrest ranges of southwestern Montana
Garnet crystals, some of gem quality, have been sought by rock hounds for many years in the alluvial deposits of the Alder Gulch-Ruby River area. Since 1995, garnet have been extracted from these gravels for industrial products at two separately own placer mines in the region: (1) at Cominco American's "Ruby Garnet" operation at Alder , Montana and (2) at the "Sweetwater Garnet"...
Authors
Bradley S. Van Gosen, Jane M. Hammarstrom, Karl S. Kellogg, Richard B. Berg
Mineral resource assessment; Custer and Gallatin national forests, Montana Mineral resource assessment; Custer and Gallatin national forests, Montana
No abstract available.
Authors
Jane Marie Hammarstrom, Anna B. Wilson, Bradley S. Van Gosen, Robert R. Carlson, Dolores M. Kulik, Gregory K. Lee, James E. Elliott, William J. Perry, Edward A. du Bray, Michael L. Zientek
Potentially hazardous elements in coal: Modes of occurrence and summary of concentration data for coal components Potentially hazardous elements in coal: Modes of occurrence and summary of concentration data for coal components
Mode-of-occurrence data are summarized for 13 potentially hazardous elements (Be, Cr, Mn, Co, Ni, As, Se, Cd, Sb, Hg, Pb, Th, U) in coal. Recent work has refined mode-of-occurrence data for Ni, Cr, and As, as compared to previous summaries. For Cr, dominant modes of occurrence include the clay mineral iliite, an amorphous CrO(OH) phase, and Cr-bearing spinels. Nickel is present in Fe...
Authors
Allan Kolker, Robert B. Finkelman
Optical-cell evidence for superheated ice under gas-hydrate-forming conditions Optical-cell evidence for superheated ice under gas-hydrate-forming conditions
We previously reported indirect but compelling evidence that fine-grained H2O ice under elevated CH4 gas pressure can persist to temperatures well above its ordinary melting point while slowly reacting to form methane clathrate hydrate. This phenomenon has now been visually verified by duplicating these experiments in an optical cell while observing the very slow hydrate-forming process...
Authors
L.A. Stern, D.L. Hogenboom, W.B. Durham, S. H. Kirby, I.-M. Chou
Preliminary report on water quality associated with the abandoned Fontana and Hazel Creek Mines, Great Smoky Mountains National Park, North Carolina and Tennessee Preliminary report on water quality associated with the abandoned Fontana and Hazel Creek Mines, Great Smoky Mountains National Park, North Carolina and Tennessee
No abstract available.
Authors
R.R. Seal, J. M. Hammarstrom, C.S. Southworth, A. L. Meier, D.P. Haffner, A. P. Schultz, G.S. Plumlee, M.J. Flohr, J.C. Jackson, S. M. Smith, P. L. Hageman
Map showing areas with potential for talc deposits in the Gravelly, Greenhorn, and Ruby Ranges and the Henrys Lake Mountains of southwestern Montana Map showing areas with potential for talc deposits in the Gravelly, Greenhorn, and Ruby Ranges and the Henrys Lake Mountains of southwestern Montana
For the last several years, Montana has been the leading talc producing state in the United States (U.S. Geological Survey, 1996). For example, in 1992 Montana supplied about 40 percent of the U.S. mine production of talc (Virta, 1992). All of this production has come from the large deposits of high purity talc in the southwestern part of the state. All Montana talc is currently (1997)...
Authors
Bradley S. Van Gosen, Richard B. Berg, Jane M. Hammarstrom
The etiology of Balkan endemic nephropathy: Still more questions than answers The etiology of Balkan endemic nephropathy: Still more questions than answers
Balkan endemic nephropathy (BEN) has attracted increasing attention as a possible environmental disease, and a significant amount of research from complementary scientific fields has been dedicated to its etiology. There are two actual competing theories attempting to explain the cause of this kidney disease: 1) the mycotoxin hypothesis, which considers that BEN is produced by ochratoxin...
Authors
C. A. Tatu, W. H. Orem, R. B. Finkelman, G. L. Feder
Coal resources, new air quality standards, and sustainability Coal resources, new air quality standards, and sustainability
No abstract available.
Authors
Emil D. Attanasi
Glimpses of the Ice Age from I-81: Lee Ranger District Glimpses of the Ice Age from I-81: Lee Ranger District
Travelers on Interstate Highway 81 can see remnants of the Ice Age on the mountains between Strasburg and Harrisonburg, Virginia. Scattered along the miles of green, forested mountains are many gray patches without any forests. These treeless patches, or openings, in the steep mountain forests are block fields - geologic features that owe their origin to the Ice Age.
Authors
Water Resources Division U.S. Geological Survey