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: 1829
The biogeochemistry of wetlands in the San Luis Valley, Colorado: The effects of acid drainage from natural and mine sources
The Summitville Mine, located near the old mining town of Summitville in Rio Grande County, Colorado, operated between July 1986 and December 1992 as a large-tonnage open-pit heap-leach gold mine. During its 6 years of existence the trace metal levels in drainage water from the mine site were elevated over historical (pre-1986) levels (Moran and Wentz, 1974) due to input from three sources—heap le
Authors
Larry P. Gough, Laurie S. Balistrieri, F. E. Lichte, T.M. Yanosky, Ronald C. Severson, A.S. Archuleta
Evidence for a basement feature related to the Cortez disseminated gold trend and implications for regional exploration in Nevada
No abstract available.
Authors
V. J. Grauch, Robert C. Jachens, Richard J. Blakely
Metamorphic and structural history of continental crust at a Mesozoic collisional margin, the Ruby terrane, central Alaska
The Ruby terrane is an elongate fragment of continental crustal rocks that is structurally overlain by thrust slices of oceanic crust. Our results from the Kokrines Hills, in the south‐central part of the Ruby terrane, demonstrate that the low‐angle schistose fabric formed under high‐P/low‐T conditions, at peak conditions of 10.8‐13.2 kbar and 425‐550° C, consistent with the rare occurrence of gla
Authors
S. M. Roeske, Cynthia Dusel-Bacon, John N. Aleinikoff, L. W. Snee, Marvin A. Lanphere
Potential-Field Geophysical Software for the PC
The computer programs of the Potential-Field Software Package run under the DOS operating system on IBM-compatible personal computers. They are used for the processing, display, and interpretation of potential-field geophysical data (gravity- and magnetic-field measurements) and other data sets that can be represented as grids or profiles. These programs have been developed on a variety of compute
Authors
Aeromagnetic investigations of hazardous waste sites
Aeromagnetic survey data collected by helicopter over hazardous waste sites can be used to map the distribution of buried metallic (ferrous) objects at these sites, including drums and scrap metal. Thorough knowledge of the locations and nature of hazardous waste containers and contaminated objects is needed prior to the start of remediation efforts. Non-invasive geophysical techniques such as the
Authors
USGS reference materials
Every year in the United States, millions
of measurements are made on the chemical
composition of items that affect us on a
daily basis. Determining the accuracy of
these measurements is based on the analysis
of appropriate reference materials whose
composition was previously determined
through rigorous testing. Today, reference
materials help us evaluate the composition
of the food we ea
Authors
Magnetic surveys for locating abandoned wells
Abandoned and unrecorded wells may act as conduits for the contamination of groundwater supplies by oil field brines and other pollutants. The casings of abandoned wells eventually develop leaks, which, if not properly plugged, can allow pollutants to reach freshwater aquifers that supply drinking water. Sources of pollutants include brine ponds, landfill sites, agricultural activities, industrial
Authors
U-Pb ages of metarhyolites of the Catoctin and Mount Rogers formations, central and southern Appalachians: Evidence for two pulses of Iapetan rifting
No abstract available.
Authors
John N. Aleinikoff, Robert E. Zartman, Marianne Walter, Douglas W. Rankin, Peter T. Lyttle, William C. Burton
Link between ridge subduction and gold mineralization in southern Alaska
40Ar/39Ar geochronology reveals that turbidite-hosted gold deposits in the southern Alaska accretionary prism are the same age as nearby near-trench plutons. These early Tertiary plutons and gold lodes formed above a slab window during subduction of an oceanic spreading center. Ridge subduction is a previously unrecognized tectonic process for the generation of lode gold.
Authors
Peter J. Haeussler, Dwight Bradley, Richard Goldfarb, Lawrence W. Snee, Cliff D. Taylor
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.
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