Day, Warren C.

About the author

U.S. Geological Survey, Central Region, Rocky Mountain area, Director's office
Aeromagnetic surveying, Atomic absorption analysis, Atomic emission spectroscopy, Bedrock geologic units, Cerium, Chemical analysis, Coal resources, Copper, Dysprosium, Economic geology, Erbium, Europium, Faulting (geologic), Field sampling, Gadolinium, Geochemistry, Geographic information systems, Geologic maps, Geologic structure, Geology, Geospatial datasets, Geothermal resources, Gold, Gravimeter measurement, Holmium, Igneous rocks, Image collections, Interagency programs, Lanthanide series elements, Lidar, Lutetium, Maps and atlases, Mass spectroscopy, Metallic mineral resources, Mineral deposits, Mineral resources, Natural resource assessment, Natural resource exploration, Neodymium, Neutron activation analysis, Partnerships, Photography, Praseodymium, Promethium, Rare earth elements, Reports, Rocks and deposits, Samarium, Scandium, Soil chemistry, Stratigraphy, Structural geology, Study areas, Terbium, Thulium, Uranium, Uranium-lead analysis, Water chemistry, X-ray fluorescence, Ytterbium, Yttrium, Mine sites, Mineral deposit areas, ArcInfo interchange, GeoTIFF, Geodatabase (ESRI), Microsoft Access format, Microsoft Excel format, Columnar text, Comma-delimited text, File geodatabase (ESRI), Shapefile, Antimony, Barite, Bentonite, Clays, Copper, Diatomite, Gallium, Gemstones, Gold, Gypsum, Iron ore, Lead, Lithium, Mercury, Molybdenum, Rare earths, Silver, Stone (dimension), Titanium mineral concentrates (ilmenite, rutile), Tungsten, Vanadium, Zeolites (natural), Zinc

Geologic map of the Big Delta B-2 quadrangle, east-central Alaska

Geologic map of the Big Delta B-2 quadrangle, including U-Pb geochronology, correlation chart, and description of map units.

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Geologic map of the Big Delta B-1 quadrangle, east-central Alaska

Geologic mapping and U-Pb age dating of the Big Delta B-1 quadrangle provides insights into the geology and gold mineralization of the headwater region of the Goodpaster River.

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Geologic field notes, geochemical analyses, and field photographs of outcrops and rock samples from the Big Delta B-1 quadrangle, east-central Alaska

Major element oxide and trace element geochemical analyses, including those for gold, silver, and base metals, for representative rock units and for grab samples from quartz veins and mineralized zones within the quadrangle

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Geologic field notes and geochemical analyses of outcrop and drill core from Mesoproterozoic rocks and iron-oxide deposits and prospects of southeast Missouri

Field notes, locations, rock descriptions, and geochemical analyses from a 1988 to 1994 study to facilitate new research efforts in IOCG (iron-oxide deposits in context with other iron oxide-copper ± uranium) deposit types.

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Geologic map of the Kechumstuk fault zone in the Mount Veta area, Fortymile mining district, east-central Alaska

This map depicts the fundamental geologic features for the western part of the Fortymile mining district and delineates the location of known bedrock mineral prospects and their relationship to rock types and structural features.

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Mineral resources of the Sagebrush Focal Areas of Idaho, Montana, Nevada, Oregon, Utah, and Wyoming

Locatable mineral assessment tracts, along with fundamental geological, mineral and energy resource data used in the assessment.

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Overview with methods and procedures of the U.S. Geological Survey mineral-resource assessment of the Sagebrush Focal Areas of Idaho, Montana, Nevada, Oregon, Utah, and Wyoming

Describes the methods, procedures, and fundamental reference information that were used throughout the assessment.

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The Earth Mapping Resources Initiative (Earth MRI): Mapping the Nation’s Critical Mineral Resources

A planned partnership between the USGS, the Association of American State Geologists, and other Federal, State, and private organizations to collect scientific information useful for finding and exploiting critical mineral resources in the US.

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USGS mineral-resource assessment of Sagebrush Focal Areas in the western United States

U.S. Geological Survey (USGS) scientists have completed an assessment of the mineral-resource potential of nearly 10 million acres of Federal and adjacent lands in Idaho, Montana, Nevada, Oregon, Utah, and Wyoming. The assessment of these lands, identifie

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Water and sediment chemical data and data summary of samples collected in 1999 and 2001 in the Goodpaster River Basin, Big Delta B-2 Quadrangle, Alaska

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GIS and data tables for focus areas for potential domestic nonfuel sources of rare earth elements

Locations of focus areas to be used for planning and collection of geophysical, geological, and topographic (lidar) data pertaining to the study of rare earth element resources in the US.

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