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: 1986
A special issue on volcanic centers as targets for mineral exploration; preface A special issue on volcanic centers as targets for mineral exploration; preface
NEPTUNE or Pluto? Since the days of Hutton and Werner, every generation of economic geologists has addressed this question in a new light. Most papers in this special issue deal with the thin and leaky roof of Pluto's underworld. It allows hot emanations from Hades to leak out, only to be quenched and diluted by waters percolating down from Neptune's realm.
Hydrous carbonates on Mars?: Evidence from Mariner 6/7 infrared spectrometer and ground‐based telescopic spectra Hydrous carbonates on Mars?: Evidence from Mariner 6/7 infrared spectrometer and ground‐based telescopic spectra
Absorption features at 2.28 and 5.4 μm identified in Mariner 6/7 infrared spectrometer and terrestrial telescopic spectra are consistent with the spectra of hydrous magnesium carbonates such as hydromagnesite and artinite. Spectral characteristics of these hydrous carbonates are different from those of the anhydrous carbonates, as the former do not have the strong spectral features...
Authors
W. M. Calvin, T. V. V. King, Roger N. Clark
Environmental geology of the Summitville mine, Colorado Environmental geology of the Summitville mine, Colorado
Although altered and mineralized rocks at Summitville mine in Colorado contain minimal amount of sulfide minerals, acid mine problems existed primarily because of the pervasive alteration of the surrounding rocks, through hydrothermal process, to highly siliceous and argillized rocks that are incapable of buffering acidic waters during weathering. The problems are compounded by the...
Authors
John E. Gray, Mark F. Coolbaugh, Geoffrey S. Plumlee, William W. Atkinson
Magnetization and geochemistry of greigite-bearing Cretaceous strata, North Slope basin, Alaska Magnetization and geochemistry of greigite-bearing Cretaceous strata, North Slope basin, Alaska
No abstract available.
Authors
Richard L. Reynolds, Michele L. Tuttle, Cynthia A. Rice, Neil S. Fishman, John A. Karachewski, David M. Sherman
Natural radionuclides Natural radionuclides
No abstract available.
Authors
D. Kirk Nordstrom, Richard B. Wanty
Petrology and U-Pb geochronology of buried Avalonian plutonic rocks on southeastern Cape Cod Petrology and U-Pb geochronology of buried Avalonian plutonic rocks on southeastern Cape Cod
Plutonic rocks have been intersected by two separate drill holes on southeastern Cape Cod. Hole CC2 is located at Chatham Harbor about 7 km south of the Nauset anomaly, an east-northeast-trending magnetic lineament that was considered to separate the distinct plutonic zones of Avalon terrane. This drill hole intersected weakly foliated, fairly homogeneous biotite granite. Zircons from...
Authors
G. W. Leo, J.K. Mortensen, B. Barreiro, J. D. Phillips
Materials provided at the workshop Geophysical map interpretation on the PC, convened April 21-22, 1993 Materials provided at the workshop Geophysical map interpretation on the PC, convened April 21-22, 1993
No abstract available.
Authors
V.J. Grauch, J. D. Phillips, D.B. Hoover, J. A. Pitkin, K.E. Livo, A. E. McCafferty
The U. S. Geological Survey, Digital Spectral Library: Version 1 (0.2 to 3.0um) The U. S. Geological Survey, Digital Spectral Library: Version 1 (0.2 to 3.0um)
We have developed a digital reflectance spectral library, with management and spectral analysis software. The library includes 498 spectra of 444 samples (some samples include a series of grain sizes) measured from approximately 0.2 to 3.0 um . The spectral resolution (Full Width Half Maximum) of the reflectance data is
Authors
Roger N. Clark, Gregg A. Swayze, Andrea J. Gallagher, Trude King, Wendy M. Calvin
Materials provided at the workshop Geophysical map interpretation on the PC, convened April 21-22, 1993 Materials provided at the workshop Geophysical map interpretation on the PC, convened April 21-22, 1993
No abstract available.
Authors
V.J. Grauch, J. D. Phillips, D.B. Hoover, J. A. Pitkin, K.E. Livo, A. E. McCafferty
SPVIEW; spectral plot program for accessing the USGS Digital Spectral Library database with MS-DOS personal computers, version 1.00 SPVIEW; spectral plot program for accessing the USGS Digital Spectral Library database with MS-DOS personal computers, version 1.00
No abstract available.
Authors
K. Eric Livo, Roger N. Clark, Daniel H. Knepper
Materials provided at the workshop Geophysical map interpretation on the PC, convened April 21-22, 1993 Materials provided at the workshop Geophysical map interpretation on the PC, convened April 21-22, 1993
No abstract available.
Authors
V.J. Grauch, J. D. Phillips, D.B. Hoover, J. A. Pitkin, K.E. Livo, A. E. McCafferty
Spectral Distinctions between the Leading and Trailing Hemispheres of Callisto: New Observations Spectral Distinctions between the Leading and Trailing Hemispheres of Callisto: New Observations
An analysis of recent telescopic observations of Callisto results in new insights regarding spectral variations from the leading to the trailing hemisphere of Callisto. Examination of data in the wavelength range from 2.0 to 2.5 ??m indicates that previous suggestions of spectral differences are most likely the result of experimental uncertainty or error. Slight variations in the slope...
Authors
W. M. Calvin, R. N. Clark