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Colgan, Joseph P.

About the author

Aluminum, Antimony, Arsenic, Atomic emission spectroscopy, Barium, Bedrock geologic units, Beryllium, Boron, Calcium, Cerium, Cesium, Chromium, Coal resources, Cobalt, Copper, Dysprosium, Economic geology, Erbium, Europium, Fluorine, Gadolinium, Gallium, Geochemical processes, Geochemistry, Geologic maps, Geologic structure, Geospatial datasets, Geothermal resources, Gold, Hafnium, Holmium, Igneous rocks, Iron, Lanthanum, Lead, Lutetium, Magnesium, Manganese, Mass spectroscopy, Microscopy, Mineral deposits, Mineral resources, Molybdenum, Natural resource assessment, Natural resource exploration, Neodymium, Nickel, Niobium, Particle-beam spectroscopy, Petrography, Phosphorus, Potassium, Praseodymium, Radiometric dating, Rubidium, Samarium, Scandium, Silver, Sodium, Strontium, Tantalum, Terbium, Thorium, Thulium, Tin, Titanium, Tungsten, Uranium, Uranium-lead analysis, Vanadium, Volcanic rocks, X-ray fluorescence, Ytterbium, Yttrium, Zinc, Zirconium, Mine sites, Mineral deposit areas, Alkaline basalt, Andesite, Dacite, Latite, Quartz monzonite, Rhyodacite, Rhyolite, Trachyandesite, Trachyte, Tuff, Volcanic rock, Microsoft Excel format, Comma-delimited text
Petrology of volcanic rocks associated with silver-gold (Ag-Au) epithermal deposits in the Tonopah, Divide, and Goldfield Mining Districts, Nevada

Miocene calc-alkaline volcanic rocks, part of the southern segment of the ancestral Cascades magmatic arc, are spatially, temporally, and likely genetically associated with precious metal epithermal deposits in the Tonopah, Divide, and Goldfield Districts

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Geology and mineral resources of the Sheldon-Hart Mountain National Wildlife Refuge Complex (Oregon and Nevada), the Southeastern Oregon and North-Central Nevada, and the Southern Idaho and Northern Nevada (and Utah) Sagebrush Focal Areas

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Data to accompany U.S. Geological Survey Data Series 1099: Petrographic, geochemical and geochronologic data for Cenozoic volcanic rocks of the Tonopah, Divide, and Goldfield Mining Districts, Nevada

Geochemical, petrographic, and geochronologic data for samples, principally those of unmineralized Tertiary volcanic rocks, from the Tonopah, Divide, and Goldfield mining districts of west-central Nevada.

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