Publications
Here you will find publications, reports and articles produced by Energy and Mineral scientists. For a comprehensive listing of all USGS publications, click the button below.
Filter Total Items: 1319
Relationship of faults in basin sediments to the gravity and magnetic expression of their underlying fault systems Relationship of faults in basin sediments to the gravity and magnetic expression of their underlying fault systems
Gravity and magnetic surveys were performed along the western flanks of the Santa Rita Mountain range located in southeastern Arizona to develop an understanding of the relationship between surface fault scarps within the basin fill sediments and theirgeophysical response of the faults at depth within the bedrock. Data were acquired for three profiles, one of them along the northern...
Authors
Christopher A. Baldyga
Alaska resource data file: Goodnews Bay quadrangle Alaska resource data file: Goodnews Bay quadrangle
No abstract available.
Authors
Travis Hudson
Alaska resource data file: Stepovak Bay quadrangle Alaska resource data file: Stepovak Bay quadrangle
No abstract available.
Authors
S. H. Pilcher
Alaska resource data file: Cordova quadrangle Alaska resource data file: Cordova quadrangle
No abstract available.
Authors
S.W. Nelson
Calculating depths to shallow magnetic sources using aeromagnetic data from the Tucson Basin Calculating depths to shallow magnetic sources using aeromagnetic data from the Tucson Basin
Using gridded high-resolution aeromagnetic data, the performance of several automated 3-D depth-to-source methods was evaluated over shallow control sources based on how close their depth estimates came to the actual depths to the tops of the sources. For all three control sources, only the simple analytic signal method, the local wavenumber method applied to the vertical integral of the...
Authors
Daniel W. Casto
Use of structural geology in exploration for and mining of sedimentary rock-hosted Au deposits Use of structural geology in exploration for and mining of sedimentary rock-hosted Au deposits
Structural geology is an important component in regional-, district- and orebody-scale exploration and development of sedimentary rock-hosted Au deposits. Identification of timing of important structural events in an ore district allows analysis and classification of fluid conduits and construction of genetic models for ore formation. The most practical uses of structural geology deal...
Authors
Stephen G. Peters
Alaska resource data files: Fairbanks quadrangle Alaska resource data files: Fairbanks quadrangle
No abstract available.
Authors
Curtis J. Freeman, Janet Schaefer
Preliminary mineralogical characterization of weathered and less-weathered strata of the Meade Peak phosphatic shale member of the Permian Phosphoria Formation: Measured sections C and D, Dry Valley, Caribou County, Idaho Preliminary mineralogical characterization of weathered and less-weathered strata of the Meade Peak phosphatic shale member of the Permian Phosphoria Formation: Measured sections C and D, Dry Valley, Caribou County, Idaho
This study used powder X-ray diffraction, with Rietveld quantification software to quantify and characterize the mineralogy of the 83 samples collected from two stratigraphic sections measured by the U.S. Geological Survey at the Dry Valley mine in the Meade Peak Member of the Phosphoria Formation. Analyses show extensive variability of carbonate substitution in the fluorapatite...
Authors
Andrew C. Knudsen, Mickey E. Gunter, James R. Herring
Geologic map of the Steele Peak 7.5' quadrangle, Riverside County, California Geologic map of the Steele Peak 7.5' quadrangle, Riverside County, California
Open-File Report 01-449 contains a digital geologic map database of the Steele Peak 7.5’ quadrangle, Riverside County, California that includes: ARC/INFO (Environmental Systems Research Institute, http://www.esri.com) version 7.2.1 coverages of the various elements of the geologic map. A Postscript file to plot the geologic map on a topographic base, and containing a Correlation of Map...
Authors
Douglas M. Morton, Rachel M. Alvarez, Van M. Diep
Map showing plutons and accreted terranes of the Sierra Nevada, California, with a tabulation of U/Pb isotopic ages Map showing plutons and accreted terranes of the Sierra Nevada, California, with a tabulation of U/Pb isotopic ages
No abstract available.
Authors
William P. Irwin, Joseph L. Wooden
By
Petrography and physical properties of selected rock types associated with the Hayward Fault, California Petrography and physical properties of selected rock types associated with the Hayward Fault, California
This report provides brief petrographic descriptions of rock samples collected from the vicinity of the Hayward Fault, Northern California. Two groups of rock samples are represented here: A set of six samples that were used for laboratory measurements of P- and S-wave velocity , strength, density, and porosity. This group was examined using standard petrographic microscope, scanning...
Authors
Diane E. Moore, David A. Ponce
Geologic map of the Sunnymead 7.5' quadrangle, Riverside County, California Geologic map of the Sunnymead 7.5' quadrangle, Riverside County, California
Open-File Report 01-450 contains a digital geologic map database of the Sunnymead 7.5’ quadrangle, Riverside County, California that includes: ARC/INFO (Environmental Systems Research Institute, http:/www.esri.com) version 7.2.1 coverages of the various elements of the geologic map. A Postscript file to plot the geologic map on a topographic base, containing a Correlation of Map Units...
Authors
Douglas M. Morton, Jonathan C. Matti