Modes of occurrence of trace elements in coal
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Results for “Elements”
Search indexed USGS publications on groundwater, aquifers, geologic maps, mineral resources and earthquakes. Explore source records by subject and place.
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Major element X-ray fluorescence analyses of rock samples from the Selway-Bitterroot Wilderness, Idaho County, Idaho, and Missoula and Ravalli counties, Montana
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Geochemical element maps of the Hoover Wilderness and adjacent study area, Mono and Tuolumne counties, California
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Allanite-bearing calc-silicate rocks, southern Bighorn Mountains, Wyoming; geologic setting and resources of thorium, uranium, and rare-earth elements
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Major, minor, and trace elements in samples from the Wheeler Wilderness Study Area, Colorado, as determined by inductively coupled argon plasma-atomic emission spectrometry
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Determination of the Total, Commonality, and Uniqueness of Interpreted Structural Elements from Remotely Sensed Data in Alaska
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Trace element analyses of tourmalines from Appalachian-Caledonian massive sulfide deposits
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A program in Hewlett-Packard BASIC for plotting rare-earth element diagrams, using HP-series 80 computers
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Whole-rock trace element analyses of chromite-bearing rocks from the lowermost cyclic unit of the Stillwater Complex, Montana
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Major element analysis of rocks and sediments by atomic absorption spectroscopy
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Selected trace-element data for streams in the southern Yampa River basin, northwestern Colorado
Increases in coal mining in northwestern Colorado have increased concerns about the impact of mining on the chemical quality of surface water. One area of particular concern is in the southern part of the Yampa River basin. To identify the possible changes in water quality produced by mining in this area, it is first necessary to determine the present water chemistry resulting from the geology, climate, and land use. Because few data were available, a program for the synoptic collection of water-quality data was developed in which sampling sites were selected to determine the surface-water chemistry. (USGS)
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The determination of 28 elements in whole coal by direct-current arc spectrography
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Distribution of elements and minerals in the Tippecanoe Sequence of the Western United States; basic data and statistical summaries
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Major- and trace-element composition of greenstones, greenschists, amphibolites, and selected mica schists and gneisses from the North Cascades, Washington
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