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: 2021
The historical development of the magnetic method in exploration The historical development of the magnetic method in exploration
The magnetic method, perhaps the oldest of geophysical exploration techniques, blossomed after the advent of airborne surveys in World War II. With improvements in instrumentation, navigation, and platform compensation, it is now possible to map the entire crustal section at a variety of scales, from strongly magnetic basement at regional scale to weakly magnetic sedimentary contacts at...
Authors
M.N. Nabighian, V. J. S. Grauch, R. O. Hansen, T.R. LaFehr, Y. Li, J.W. Peirce, J. D. Phillips, M.E. Ruder
The composition of coexisting jarosite-group minerals and water from the Richmond mine, Iron Mountain, California The composition of coexisting jarosite-group minerals and water from the Richmond mine, Iron Mountain, California
Jarosite-group minerals accumulate in the form of stalactites and fine-grained mud on massive pyrite in the D drift of the Richmond mine, Iron Mountain, California. Water samples were collected by placing beakers under the dripping stalactites and by extracting pore water from the mud using a centrifuge. The water is rich in Fe3+ and SO4 2−, with a pH of approximately 2.1, which is...
Authors
Heather E. Jamieson, Clare Robinson, Charles N. Alpers, D. Kirk Nordstrom, Alexei Poustovetov, Heather A. Lowers
Alaska resource data file: Melozitna quadrangle Alaska resource data file: Melozitna quadrangle
No abstract available.
Authors
David J. Szumigala, Garth E. Graham
Cassini Visual and Infrared Mapping Spectrometer observations of Iapetus: Detection of CO2 Cassini Visual and Infrared Mapping Spectrometer observations of Iapetus: Detection of CO2
The Visual and Infrared Mapping Spectrometer (VIMS) instrument aboard the Cassini spacecraft obtained its first spectral map of the satellite lapetus in which new absorption bands are seen in the spectra of both the low-albedo hemisphere and the H2O ice-rich hemisphere. Carbon dioxide is identified in the low-albedo material, probably as a photochemically produced molecule that is...
Authors
B. J. Buratti, D. P. Cruikshank, R. Brown, R. N. Clark, J.M. Bauer, R. Jaumann, T. B. McCord, D.P. Simonelli, C. A. Hibbitts, G. B. Hansen, T.C. Owen, K. H. Baines, G. Bellucci, J.-P. Bibring, F. Capaccioni, P. Cerroni, A. Coradini, P. Drossart, V. Formisano, Y. Langevin, D. L. Matson, V. Mennella, R.M. Nelson, P. Nicholson, B. Sicardy, Christophe Sotin, T. L. Roush, K. Soderlund, A. Muradyan
Nitrogen transformations in hot spring runoff, Yellowstone National Park, WY Nitrogen transformations in hot spring runoff, Yellowstone National Park, WY
No abstract available.
Authors
JoAnn M. Holloway, D. Kirk Nordstrom, R. L. Smith
Deciphering multiple Mesoproterozoic and Paleozoic events recorded in zircon and titanite from the Baltimore Gneiss, Maryland: SEM imaging, SHRIMP U-Pb geochronology, and EMP analysis Deciphering multiple Mesoproterozoic and Paleozoic events recorded in zircon and titanite from the Baltimore Gneiss, Maryland: SEM imaging, SHRIMP U-Pb geochronology, and EMP analysis
The Baltimore Gneiss, exposed in antiforms in the eastern Maryland Piedmont, consists of a suite of felsic and mafic gneisses of Mesoproterozoic age. Zircons from the felsic gneisses are complexly zoned, as shown in cathodoluminescence imaging; most zircon grains have multiple overgrowth zones, some of which are adjacent and parallel to elongate cores. Sensitive high-resolution ion...
Authors
John N. Aleinikoff, J. Wright Horton,, Avery A. Drake, R. P. Wintsch, C.M. Fanning, K. Yi
Weathering of the meade peak phosphatic shale member, phosphoria formation: Observations based on uranium and its decay products Weathering of the meade peak phosphatic shale member, phosphoria formation: Observations based on uranium and its decay products
Variably weathered outcrop samples of the Meade Peak Phosphatic Shale Member of the Phosphoria Formation have 5-10% of the contained uranium (U) in a form readily extractable by 0.1 M sodium bicarbonate. Fission track radiography of outcrop samples and other less-weathered channel and core samples indicate that this mobile fraction of U is likely hosted by organic matter, secondary iron...
Authors
Robert A. Zielinski, James R. Budahn, Richard I. Grauch, J. B. Paces, K. R. Simmons
Implications of latest Pennsylvanian to middle permian paleontological and U-Pb SHRIMP data from the tecomate formation to re-dating tectonothermal events in the acatlán complex, Southern Mexico Implications of latest Pennsylvanian to middle permian paleontological and U-Pb SHRIMP data from the tecomate formation to re-dating tectonothermal events in the acatlán complex, Southern Mexico
Limestones in the highly deformed Tecomate Formation, uppermost unit of the Acatlán Complex, are latest Pennsylvanian—earliest Middle Permian in age rather than Devonian, the latter based on less diagnostic fossils. Conodont collections from two marble horizons now constrain its age to range from latest Pennsylvanian to latest Early Permian or early Middle Permian. The older collection...
Authors
J. Duncan Keppie, Charles Sandberg, B.V. Miller, J. L. Sanchez-Zavala, R.D. Nance, Forrest G. Poole
Surface geophysical investigation of the areal and vertical extent of metallic waste at the former Tyson Valley Powder Farm near Eureka, Missouri, Spring 2004 Surface geophysical investigation of the areal and vertical extent of metallic waste at the former Tyson Valley Powder Farm near Eureka, Missouri, Spring 2004
The former Tyson Valley Powder Farm near Eureka, Missouri, was used primarily as a storage facility for the production of small arms ammunition during 1941?47 and 1951?61. A secondary use of the site was for munitions testing and disposal. Surface exposures of small arms waste, characterized by brass shell casings and fragments, as well as other miscellaneous scrap metal are remnants of...
Authors
Lyndsay B. Ball, Wade H. Kress, Eric D. Anderson, Andrew Teeple, James W. Ferguson, Charles R. Colbert
Water-rock interaction Water-rock interaction
No abstract available.
Schlumberger soundings in the Long Beach-Wilmington area, County of Los Angeles, California Schlumberger soundings in the Long Beach-Wilmington area, County of Los Angeles, California
No abstract available.
Authors
Robert J. Bisdorf, David V. Fitterman
Preliminary report on using imaging spectroscopy to map ultramafic rocks, serpentinites, and tremolite-actinolite-bearing rocks in California Preliminary report on using imaging spectroscopy to map ultramafic rocks, serpentinites, and tremolite-actinolite-bearing rocks in California
Airborne Visible/InfraRed Imaging Spectrometer (AVIRIS) data were collected in approximately 3- kilometer-wide swaths over selected areas in El Dorado and Plumas Counties that contain serpentinite and ultramafic rocks as part of an experiment to determine if potentially asbestos-bearing rocks could be identified spectrally. M ineral maps created from the AVIRIS data were used...
Authors
Gregg A. Swayze, Chris T. Higgins, John P. Clinkenbeard, Raymond F. Kokaly, Roger N. Clark, Gregory P. Meeker, Stephen J. Sutley