Publications
Filter Total Items: 1154
Preliminary geologic map of the San Jose 30 X 60-minute quadrangle, California: A digital database Preliminary geologic map of the San Jose 30 X 60-minute quadrangle, California: A digital database
No abstract available.
Authors
Carl M. Wentworth, M. Clark Blake, Robert J. McLaughlin, Russell W. Graymer
High-angle faults in the basement of Yucca Flat, Nevada Test Site, Nevada, based on analysis of a constrained gravity inversion surface High-angle faults in the basement of Yucca Flat, Nevada Test Site, Nevada, based on analysis of a constrained gravity inversion surface
Using a model of the topographic subsurface derived from drill hole and gravity inversion analysis of the basement rocks in Yucca Flat, Nevada Test Site (NTS), Nevada, a fault map and digital fault dataset were constructed based on offsets of the basement surface. Because these faults are, in large part, not present at the surface, they are interpreted to be inactive faults, older than...
Authors
Geoffrey A. Phelps, Edwin H. McKee
Geologic datasets for weights-of-evidence analysis in northeast Washington: 3. Minerals-related permits on national forests, 1967-1998 Geologic datasets for weights-of-evidence analysis in northeast Washington: 3. Minerals-related permits on national forests, 1967-1998
Permits to explore for and (or) develop mineral resources on forest land can be used to indicate locations and types of mineral-related activities on national forests. Permits for these activities require filing at the Forest Service a Notice of Intention (Notice) to conduct mineral exploration activities and (or) a Plan of Operation (Plan). A Plan of Operation is required is significant
Authors
David Everett Boleneus
Field trip guide to selected studies of the Southwest Mineral and Environmental Investigations Project in southeastern Arizona Field trip guide to selected studies of the Southwest Mineral and Environmental Investigations Project in southeastern Arizona
The Southwest Mineral and Environmental Investigations Project is designed to address issues raised by rapid urban development in the basins of the southwestern U.S. These issues require objective geoscientific data that can be used by land managers and stakeholders to develop informed land and water use strategies. The project integrates new and existing geologic, geophysical, and...
Authors
B. B. Houser, M. E. Gettings, M.W. Bultman, Floyd Gray, K.R. Caruthers, D.M. Hirschberg
The Silent Canyon caldera complex — A three-dimensional model based on drill-hole stratigraphy and gravity inversion The Silent Canyon caldera complex — A three-dimensional model based on drill-hole stratigraphy and gravity inversion
The structural framework of Pahute Mesa, Nevada, is dominated by the Silent Canyon caldera complex, a buried, multiple collapse caldera complex. Using the boundary surface between low density Tertiary volcanogenic rocks and denser granitic and weakly metamorphosed sedimentary rocks (basement) as the outer fault surfaces for the modeled collapse caldera complex, it is postulated that the...
Authors
Edwin H. McKee, Thomas G. Hildenbrand, Megan L. Anderson, Peter D. Rowley, David A. Sawyer
Digital mining claim density map for federal lands in Arizona: 1996 Digital mining claim density map for federal lands in Arizona: 1996
This report describes a digital map generated by the U.S. Geological Survey (USGS) to provide digital spatial mining claim density information for federal lands in Arizona as of March 1997. Mining claim data is earth science information deemed to be relevant to the assessment of historic, current, and future ecological, economic, and social systems. There is no paper map included in this...
Authors
Paul C. Hyndman, Harry W. Campbell
Character of the middle Nonlithophysal Zone of the Topopah Spring Tuff at Yucca Mountain Character of the middle Nonlithophysal Zone of the Topopah Spring Tuff at Yucca Mountain
No abstract available.
Authors
David C. Buesch, R.W. Spengler
Detailed correlation of lithostratigraphic and borehole geophysical log data for identifying contacts at Yucca Mountain Detailed correlation of lithostratigraphic and borehole geophysical log data for identifying contacts at Yucca Mountain
No abstract available.
Authors
David C. Buesch, R.W. Spengler
Geology and regional correlation of the Cretaceous and Paleogene rocks of the Gualala block, northern California Geology and regional correlation of the Cretaceous and Paleogene rocks of the Gualala block, northern California
No abstract available.
Authors
C. M. Wentworth, D. L. Jones, E. E. Brabb
A simplified economic filter for open-pit gold-silver mining in the United States A simplified economic filter for open-pit gold-silver mining in the United States
In resource assessments of undiscovered mineral deposits and in the early stages of exploration, including planning, a need for prefeasibility cost models exists. In exploration, these models to filter economic from uneconomic deposits help to focus on targets that can really benefit the exploration enterprise. In resource assessment, these models can be used to eliminate deposits that...
Authors
Donald A. Singer, W. David Menzie, Keith R. Long
Geology of the onshore part of San Mateo County, California: A digital database Geology of the onshore part of San Mateo County, California: A digital database
No abstract available.
Authors
E. E. Brabb, R. W. Graymer, D. L. Jones
Tertiary uplift of the Mt. Doonerak antiform, central Brooks Range, Alaska: Apatite fission track evidence from the Trans-Alaska crustal transect Tertiary uplift of the Mt. Doonerak antiform, central Brooks Range, Alaska: Apatite fission track evidence from the Trans-Alaska crustal transect
The Mt. Doonerak antiform is a northeast-trending, doubly plunging antiform located along the axial part of the central Brooks Range. This antiform is a crustal-scale duplex estimated to have a vertical displacement of ~15 km. The antiform folds the Amawk thrust, which separates relatively less displaced lower plate rocks in a window in the core of the antiform from allochthonous upper...
Authors
P. B. O’Sullivan, Thomas E. Moore, J.M. Murphy