Publications
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Digital mining claim density map for federal lands in Colorado: 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 Colorado 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 Open-Fil
Authors
Paul C. Hyndman, Harry W. Campbell
Digital mining claim density map for federal lands in California: 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 California 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 Open-
Authors
Paul C. Hyndman, Harry W. Campbell
Digital mining claim density map for federal lands in Utah: 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 Utah 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 Open-File r
Authors
Paul C. Hyndman, Harry W. Campbell
Geologic datasets for weights-of-evidence analysis in northeast Washington: 2. Mineral databases
Digital mineral databases are necessary to carry out weights-of-evidence modeling of mineral resources for epithermal gold and carbonate-hosted lead-zinc deposits in northeast Washington. This report describes spreadsheet tables consisting of: 1) training sites for epithermal gold, 2) placer gold sites, 3) training sites for carbonate-hosted lead-zinc, and 4) small lead-zinc mines and prospects. A
Authors
D. E. Boleneus
Plutons and accretionary episodes of the Klamath Mountains, California and Oregon
The Klamath Mountains consist of various accreted terranes and include many plutons that range in composition from gabbro to granodiorite. Some of the plutons (preaccretionary plutons) were parts of terranes before the terranes accreted; others (accretionary plutons) intruded during or after the accretion of their host terrane(s). This report attempts to (1) graphically illustrate how the Klamath
Authors
William P. Irwin, Joseph L. Wooden
Principal facts for gravity stations and physical property measurements in the Lake Mead 30' by 60' quadrangle, Nevada and Arizona
The U.S. Geological Survey (USGS) collected 811 gravity stations on the Lake Mead 30' by 60' quadrangle from October, 1997 to September, 1999. These data were collected in support of geologic mapping of the Lake Mead quadrangle. In addition to these new data, gravity stations were compiled from a number of sources. These stations were reprocessed according to the reduction method described below a
Authors
V. E. Langenheim, J. G. Davidson, M.L. Anderson, H. R. Blank
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 the alluvia
Authors
Geoffrey A. Phelps, Edwin H. McKee
Digital geologic map of part of the Thompson Falls 1:100,000 quadrangle, Idaho
The geology of the Thompson Falls 1:100,000 quadrangle, Idaho was compiled by Reed S. Lewis in 1997 onto a 1:100,000-scale greenline mylar of the topographic base map for input into a geographic information system (GIS). The resulting digital geologic map GIS can be queried in many ways to produce a variety of geologic maps. Digital base map data files (topography, roads, towns, rivers and lakes,
Authors
Reed S. Lewis, Pamela D. Derkey
Preliminary digital map of cryptocrystalline occurrences in northern Nevada
The purpose was to identify potential cryptocrystalline material sources for tools used by indigenous people of the northern Nevada portion of the Great Basin. Cryptocrystalline occurrence data combed from the U.S. Geological Survey's Mineral Resources Data System (MRDS, 1995) were combined with sites described in Nevada rockhound guides and entered into a geographic information system (GIS). The
Authors
Lorre A. Moyer
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 geochemical dat
Authors
B. B. Houser, M. E. Gettings, M.W. Bultman, Floyd Gray, K.R. Caruthers, D.M. Hirschberg
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 Open-Fil
Authors
Paul C. Hyndman, Harry W. Campbell
Preliminary aeromagnetic anomaly map of California
The magnetization in crustal rocks is the vector sum of induced in minerals by the Earth’s present main field and the remanent magnetization of minerals susceptible to magnetization (chiefly magnetite) (Blakely, 1995). The direction of remanent magnetization acquired during the rock’s history can be highly variable. Crystalline rocks generally contain sufficient magnetic minerals to cause variatio
Authors
Carter W. Roberts, Robert C. Jachens