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: 1826
Analytical results for 35 mine-waste tailings cores and six bed sediment samples, and an estimate of the volume of contaminated materials at Buckeye meadow on upper Basin Creek, northern Jefferson County, Montana
Metal-mining related wastes in the Boulder River basin study area in northern Jefferson County, Montana have been implicated in their detrimental effects on water quality with regard to acid-generation and toxic-metal solubilization. Flotation-mill tailings in the meadow below the Buckeye mine, hereafter referred to as the Buckeye mill-tailings site, have been identified as significant contributor
Authors
David L. Fey, Stan E. Church, Christopher J. Finney
Environmental signatures of mineral deposits and areas of regional hydrothermal alteration in Northeastern Hungary
No abstract available.
Authors
L. Odor, Richard B. Wanty, I. Horvath, U. Fugedi
Distribution of altered rock material in the Kerber Creek drainage basin, Saguache County, Colorado
No abstract available.
Authors
K.E. Livo, Ken Watson, D. H. Knepper, Susanne Hummer-Miller
Hydrogen peroxide on the surface of Europa
Spatially resolved infrared and ultraviolet wavelength spectra of Europa's leading, anti-jovian quadrant observed from the Galileo spacecraft show absorption features resulting from hydrogen peroxide. Comparisons with laboratory measurements indicate surface hydrogen peroxide concentrations of about 0.13 percent, by number, relative to water ice. The inferred abundance is consistent with radiolyti
Authors
R. W. Carlson, M.S. Anderson, R.E. Johnson, W. D. Smythe, A.R. Hendrix, C.A. Barth, L. A. Soderblom, G. B. Hansen, T. B. McCord, J.B. Dalton, R. N. Clark, J.H. Shirley, A.C. Ocampo, D. L. Matson
Spectroscopic determination of leaf biochemistry using band-depth analysis of absorption features and stepwise multiple linear regression
We develop a new method for estimating the biochemistry of plant material using spectroscopy. Normalized band depths calculated from the continuum-removed reflectance spectra of dried and ground leaves were used to estimate their concentrations of nitrogen, lignin, and cellulose. Stepwise multiple linear regression was used to select wavelengths in the broad absorption features centered at 1.73 ??
Authors
R.F. Kokaly, R. N. Clark
Distinguishing Grenvillian basement from pre-Taconian cover rocks in the Northern Appalachians
Distinguishing Grenvillian basement rocks from pre-Taconian cover sequences in the Appalachians is a first-order problem essential for accurate structural interpretations. The Cavendish Formation in southeastern Vermont presents a classic example of this problem. Doll and others (1961) showed the Cavendish Formation as younger than the Middle Proterozoic Mount Holly Complex but older than the lith
Authors
Paul M. Karabinos, John N. Aleinikoff, C. Mark Fanning
Metal cycling along the northwestern Seward Peninsula, Alaska: A possible natural cause of metal contamination in the arctic: A section in Geologic studies in Alaska by the U.S. Geological Survey, 1997
The northwestern Seward Peninsula was targeted for detailed geochemical study after evaluation of data collected during the NURE reconnaissance-level program indicated anomalously high arsenic (60-635 ppm) concentrations in stream sediments. The arsenic is associated with tin skarn, greisen, and replacement deposits in the western Seward Peninsula. Surficial sampling of waters and sediments indica
Authors
C.C. Parnow, Richard J. Goldfarb, Karen D. Kelley, Geoffrey S. York
Lower Paleozoic deep-water facies of the Medfra area, central Alaska: A section in Geologic studies in Alaska by the U.S. Geological Survey, 1997
Deep-water facies, chiefly hemipelagic deposits and turbidites, of Cambrian through Devonian age are widely exposed in the Medfra and Mt. McKinley quadrangles. These strata include the upper part of the Telsitna Formation (Middle-Upper Ordovician) and the Paradise Fork Formation (Lower Silurian-Lower Devonian) in the Nixon Fork terrane, the East Fork Hills Formation (Upper Cambrian-Lower Devonian)
Authors
Julie A. Dumoulin, Dwight Bradley, Anita G. Harris, John E. Repetski
A late Frasnian (Late Devonian) radiolarian, sponge spicule, and conodont fauna from the Slaven Chert, northern Shoshone Range, Roberts Mountains allochthon, Nevada
Co-occuring conodonts, radiolarians, and sponge spicules from the type locality of the Slaven Chert, northern Shoshone Range, Nevada, indicate that the radiolarian and sponge spicule assemblage described herein correlates with the Late rhenana conodont Zone (late Frasnian). The moderately well preserved radiolarians are the first Frasnian-age fauna described from the Western Hemisphere. They inclu
Authors
S. Q. Boundy-Sanders, Charles Sandberg, B. L. Murchey, A. G. Harris
Spectroscopy of rocks and minerals and principles of spectroscopy
Spectroscopy is the study of light as a function of wavelength that has been emitted, reflected or scattered from a solid, liquid, or gas. In this chapter I will primarily discuss the spectroscopy of minerals, but the principles apply to any material. No single chapter can cover this topic adequately, and one could argue, not even a single book. Thus, in some ways, this chapter may fall short of e
Authors
Roger N. Clark
Geochemical data for stream-sediment, heavy-mineral-concentrate, and rock samples collected from the Fortyseven Creek gold-arsenic-antimony-tungsten prospect, southwestern Alaska
In the summer of 1991, we conducted a reconnaissance geochemical survey around the Fortyseven Creek Au-As-Sb-W prospect that is located in the southwestern part of the Sleetmute quadrangle. At that time, this project was a small part of a more comprehensive Alaska Mineral Resource Assessment Program (AMRAP) study of the Sleemute quadrangle. AMRAP studies were conducted by the U.S. Geological Surve
Authors
John E. Gray, G. K. Lee, R. M. O'Leary, P. M. Theodorakos
Geochronologic and isotope studies of calcite and silica constraining Quaternary unsaturated- and saturated zone hydrologic flux at Yucca Mountain, Nevada, USA
Both unsaturated- and saturated-zone aqueous solutions are capable of precipitating secondary mineral deposits that document the history and origins of past water flux. Calcite and opal occur as thin coatings on open fractures and cavity floors within the thick unsaturated zone at Yucca Mountain. Outermost surfaces of calcite have 14C ages of between 44,000 and 16,000 radiocarbon years; however, t
Authors
James B. Paces, Zell E. Peterman, Leonid A. Neymark, Joseph F. Whelan, Brian D. Marshall