Publications
Publications from the staff of the Geology, Minerals, Energy, and Geophysics Science Center
Filter Total Items: 2481
Map showing features and displacements of the Scenic Drive landslide, La Honda, California, during the period March 31-May 7, 2005 Map showing features and displacements of the Scenic Drive landslide, La Honda, California, during the period March 31-May 7, 2005
No abstract available.
Authors
Ray E. Wells, Michael J. Rymer, Carol S. Prentice, Karen L. Wheeler
Holocene fault scarps and shallow magnetic anomalies along the southern Whidbey Island fault zone near Woodinville, Washington Holocene fault scarps and shallow magnetic anomalies along the southern Whidbey Island fault zone near Woodinville, Washington
No abstract available.
Authors
Brian L. Sherrod, Richard J. Blakely, Craig Weaver, Harvey Kelsey, Elizabeth Barnett, Ray Wells
Porphyry copper deposits of the world: database, map, and grade and tonnage models Porphyry copper deposits of the world: database, map, and grade and tonnage models
Mineral deposit models are important in exploration planning and quantitative resource assessments for two reasons: (1) grades and tonnages among deposit types are significantly different, and (2) many types occur in different geologic settings that can be identified from geologic maps. Mineral deposit models are the keystone in combining the diverse geoscience information on geology...
Authors
Donald A. Singer, Vladimir Iosifovich Berger, Barry C. Moring
Use of the Biotic Ligand Model to predict metal toxicity to aquatic biota in areas of differing geology Use of the Biotic Ligand Model to predict metal toxicity to aquatic biota in areas of differing geology
This work evaluates the use of the biotic ligand model (BLM), an aquatic toxicity model, to predict toxic effects of metals on aquatic biota in areas underlain by different rock types. The chemical composition of water, soil, and sediment is largely derived from the composition of the underlying rock. Geologic source materials control key attributes of water chemistry that affect metal...
Authors
Kathleen S. Smith
Northern Cordillera Northern Cordillera
No abstract available.
Authors
J.W.H. Monger, Raymond A. Price, Warren J. Nokleberg
Stream-sediment geochemistry in mining-impacted streams: Prichard, Eagle, and Beaver Creeks, northern Coeur d'Alene mining district, northern Idaho Stream-sediment geochemistry in mining-impacted streams: Prichard, Eagle, and Beaver Creeks, northern Coeur d'Alene mining district, northern Idaho
This report presents the results of one aspect of an integrated watershed-characterization study that was undertaken to assess the impacts of historical mining and milling of silver-lead-zinc ores on water and sediment composition and on aquatic biota in streams draining the northern part of the Coeur d'Alene Mining District in northern Idaho. We present the results of chemical analyses...
Authors
Stephen E. Box, John C. Wallis, Paul H. Briggs, Zoe Ann Brown
U.S. Geological Survey 2005 oil and gas resource assessment of the central North Slope, Alaska: Play maps and results U.S. Geological Survey 2005 oil and gas resource assessment of the central North Slope, Alaska: Play maps and results
No abstract available.
Authors
Christopher P. Garrity, David W. Houseknecht, Kenneth J. Bird, Christopher J. Potter, Thomas E. Moore, Philip H. Nelson, Christopher J. Schenk
Utility of aeromagnetic studies for mapping of potentially active faults in two forearc basins: Puget Sound, Washington, and Cook Inlet, Alaska Utility of aeromagnetic studies for mapping of potentially active faults in two forearc basins: Puget Sound, Washington, and Cook Inlet, Alaska
High-resolution aeromagnetic surveys over forearc basins can detect faults and folds in weakly magnetized sediments, thus providing geologic constraints on tectonic evolution and improved understanding of seismic hazards in convergent-margin settings. Puget Sound, Washington, and Cook Inlet, Alaska, provide two case histories. In each lowland region, shallow-source magnetic anomalies are...
Authors
Richard W. Saltus, Richard J. Blakely, Peter J. Haeussler, Ray E. Wells
Implications of volcanism in coastal California for the Neogene deformation history of western North America Implications of volcanism in coastal California for the Neogene deformation history of western North America
The geologic record of coastal California includes evidence of numerous volcanic centers younger than 30 Ma that do not appear to have erupted in an arc setting. By correlating these volcanic centers with specific slab windows predicted from analysis of magnetic anomalies on the Pacific plate, we add new constraints to tectonic reconstructions since 30 Ma. Our correlations, such as...
Authors
Douglas S. Wilson, Patricia A. McCrory, Richard G. Stanley
Electrical conductivity images of active and fossil fault zones Electrical conductivity images of active and fossil fault zones
We compare recent magnetotelluric investigations of four large fault systems: (i) the actively deforming, ocean-continent interplate San Andreas Fault (SAF); (ii) the actively deforming, continent-continent interplate Dead Sea Transform (DST); (iii) the currently inactive, trench-linked intraplate West Fault (WF) in northern Chile; and (iv) the Waterberg Fault/Omaruru Lineament (WF/OL)...
Authors
O. Ritter, A. Hoffmann-Rothe, Paul A. Bedrosian, U. Weckmann, V. Haak
Ultrapotassic mafic dikes and rare earth element- and barium-rich carbonatite at Mountain Pass, Mojave Desert, southern California: Summary and field trip localities Ultrapotassic mafic dikes and rare earth element- and barium-rich carbonatite at Mountain Pass, Mojave Desert, southern California: Summary and field trip localities
No abstract available.
Authors
Gordon B. Haxel
A predictive penetrative fracture mapping method from regional potential field and geologic datasets, southwest Colorado Plateau, U.S.A. A predictive penetrative fracture mapping method from regional potential field and geologic datasets, southwest Colorado Plateau, U.S.A.
Some aquifers of the southwest Colorado Plateau, U.S.A., are deeply buried and overlain by several impermeable units, and thus recharge to the aquifer is probably mainly by seepage down penetrative fracture systems. This purpose of this study was to develop a method to map the location of candidate deep penetrative fractures over a 120,000 km2 area using gravity and aeromagnetic anomaly...
Authors
Mark E. Gettings, Mark Bultman