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: 2019
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
Depth of the base of the Jackson aquifer, based on geophysical exploration, southern Jackson Hole, Wyoming, USA Depth of the base of the Jackson aquifer, based on geophysical exploration, southern Jackson Hole, Wyoming, USA
A geophysical survey was conducted to determine the depth of the base of the water-table aquifer in the southern part of Jackson Hole, Wyoming, USA. Audio-magnetotellurics (AMT) measurements at 77 sites in the study area yielded electrical-resistivity logs of the subsurface, and these were used to infer lithologic changes with depth. A 100–600 ohm-m geoelectric layer, designated the...
Authors
Bernard T. Nolan, David L. Campbell, R. Michael Senterfit
Computer Programs to Display and Modify Data in Geographic Coordinates and Methods to Transfer Positions to and from Maps, with Applications to Gravity Data Processing, Global Positioning Systems, and 30-Meter Digital Elevation Models Computer Programs to Display and Modify Data in Geographic Coordinates and Methods to Transfer Positions to and from Maps, with Applications to Gravity Data Processing, Global Positioning Systems, and 30-Meter Digital Elevation Models
Computer programs were written in the Fortran language to process and display gravity data with locations expressed in geographic coordinates. The programs and associated processes have been tested for gravity data in an area of about 125,000 square kilometers in northwest Nevada, southeast Oregon, and northeast California. This report discusses the geographic aspects of data processing
Authors
Donald Plouff
Non-water-ice constituents in the surface material of the icy Galilean satellites from the Galileo near-infrared mapping spectrometer investigation Non-water-ice constituents in the surface material of the icy Galilean satellites from the Galileo near-infrared mapping spectrometer investigation
We present evidence for several non‐ice constituents in the surface material of the icy Galilean satellites, using the reflectance spectra returned by the Galileo near infrared mapping spectrometer (NIMS) experiment. Five new absorption features are described at 3.4, 3.88, 4.05, 4.25, and 4.57 μm for Callisto and Ganymede, and some seem to exist for Europa as well. The four absorption...
Authors
T. B. McCord, G. B. Hansen, Roger N. Clark, P. D. Martin, C. A. Hibbitts, F. P. Fanale, J. C. Granahan, M. Segura, D. L. Matson, T. V. Johnson, R. W. Carlson, W. D. Smythe, G. E. Danielson
U.S. Geological Survey studies of water co-produced with oil and gas: Implications for future petroleum resource development U.S. Geological Survey studies of water co-produced with oil and gas: Implications for future petroleum resource development
The U.S. Geological Survey is conducting research on the impacts of produced waters on petroleum resource development and the environment. Ongoing multidisciplinary investigations are focused on the 1) quantity and quality of current water production, 2) geologic and geochemical parameters that influence the viability of injection wells, and 3) processes that affect the dispersion of...
Authors
George N. Breit, Yousif K. Kharaka, Robert A. Zielinski, C. A. Rice, Bruce D. Smith, Jennie L. Ridgley
Hydrologic inferences from strontium isotopes in pore water from the unsaturated zone at Yucca Mountain, Nevada Hydrologic inferences from strontium isotopes in pore water from the unsaturated zone at Yucca Mountain, Nevada
Calcite is ubiquitous at Yucca Mountain, occurring in the soils and as fracture and cavity coatings within the volcanic tuff section. Strontium is a trace element in calcite, generally at the tens to hundreds of ppm level. Because calcite contains very little rubidium and the half-life of the 87Rb parent is billions of years, the 87Sr/86Sr ratios of the calcite record the ratio in the...
Authors
Brian D. Marshall, Kiyoto Futa, Zell E. Peterman
Source, transport, and partitioning of metals between water, colloids, and bed sediments of the Animas River, Colorado Source, transport, and partitioning of metals between water, colloids, and bed sediments of the Animas River, Colorado
No abstract available.
Authors
S. E. Church, B. A. Kimball, D.L. Fey, D.A. Ferderer, T. J. Yager, R. B. Vaughn
Genesis of the marble-hosted zinc deposits and iron deposits at Sterling Hill and Franklin, NJ, and comparisons with gneiss-hosted iron deposits at Cornwall, NY Genesis of the marble-hosted zinc deposits and iron deposits at Sterling Hill and Franklin, NJ, and comparisons with gneiss-hosted iron deposits at Cornwall, NY
No abstract available.
Authors
Craig A. Johnson
Movement and diffusion of pore fluids in Owens Lake sediments from core OL-92 as shown by salinity and deuterium-hydrogen ratios Movement and diffusion of pore fluids in Owens Lake sediments from core OL-92 as shown by salinity and deuterium-hydrogen ratios
No abstract available.
Authors
Irving Friedman, James L. Bischoff, Craig A. Johnson, Scott W. Tyler, Jeffrey P. Fitts
Distribution and mobility of molybdenum in the terrestrial environment Distribution and mobility of molybdenum in the terrestrial environment
Molybdenum (Mo) is an essential element for many plants and animals (Newton and Otsuka, 1980). Because of its chemical properties, Mo readily provides sites for reactions and catalysis in biochemical systems (Haight and Boston, 1973). It is therefore important to understand the processes that control the distribution, speciation, and behavior of Mo in the surficial environment. These...
Authors
Kathleen S. Smith, Laurie S. Balistrieri, Steven M. Smith, Ronald C. Severson
Sulfur isotope analyses using the laser microprobe Sulfur isotope analyses using the laser microprobe
Since the first studies of sulfur isotope variations in natural materials (Thode, 1949), it has been apparent that there are large and dramatic variations of 34S/32S ratios and that sulfur isotope studies are a powerful tool for interpreting the origins of sulfur-bearing minerals. However, sulfur is such a common element in the Earth's crust (sixteenth most abundant, averaging 0.03 wt %...
Authors
W.C. Pat Shanks, D.E. Crowe, Craig A. Johnson
Deep regional resistivity structure across the Carlin Trend Deep regional resistivity structure across the Carlin Trend
The genesis of gold deposits along the Carlin trend is not fully understood. Many of the significant mineral deposits in the Carlin trend were formed during the Tertiary as a result of interrelated high-angle basin-and-range faulting, intrusive igneous activity, and hydrothermal processes (Radtke, 1985). According to Shawe (1991), the linearity of the gold deposits along the Carlin trend...
Authors
Brian D. Rodriguez