Day, Warren C.

About the author

ORCID: 0000-0002-9278-2120
Mesoproterozoic, Aeromagnetic surveying, Aluminum, Antimony, Arsenic, Atomic absorption analysis, Atomic emission spectroscopy, Barium, Bedrock geologic units, Beryllium, Bismuth, Boron, Cadmium, Calcium, Carbon, Cerium, Cesium, Chemical analysis, Chlorine, Chromium, Coal resources, Cobalt, Copper, Critical minerals, Dysprosium, Economic geology, Erbium, Europium, Faulting (geologic), Field sampling, Fluorine, Gadolinium, Gallium, Geochemistry, Geographic information systems, Geologic maps, Geologic structure, Geology, Geospatial datasets, Geothermal resources, Germanium, Gold, Gravimeter measurement, Hafnium, Holmium, Igneous rocks, Image collections, Indium, Interagency programs, Iridium, Iron, Lanthanide series elements, Lanthanum, Lead, Lidar, Lithium, Lutetium, Magnesium, Manganese, Maps and atlases, Mass spectroscopy, Mercury, Metallic mineral resources, Mineral deposits, Mineral resources, Mineralogy, Molybdenum, Natural resource assessment, Natural resource exploration, Neodymium, Neutron activation analysis, Nickel, Niobium, Osmium, Palladium, Partnerships, Phosphorus, Photography, Platinum, Potassium, Praseodymium, Promethium, Rare earth elements, Reports, Rhodium, Rocks and deposits, Rubidium, Ruthenium, Samarium, Scandium, Selenium, Silicon, Silver, Sodium, Soil chemistry, Stratigraphy, Strontium, Structural geology, Study areas, Sulfur, Tantalum, Tellurium, Terbium, Thallium, Thorium, Thulium, Tin, Titanium, Tungsten, Uranium, Uranium-lead analysis, Vanadium, Water chemistry, X-ray fluorescence, Ytterbium, Yttrium, Zinc, Zirconium, 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, Tab-delimited text, 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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Geochemical Database for Iron Oxide-Copper-Cobalt-Gold-Rare Earth Element Deposits of Southeast Missouri

Geochemical analysis of samples from IOCG-REE type deposits in this area to facilitate petrologic studies, mineral resource assessments, and the definition and statistics of geochemical baseline values. Data are provided in Microsoft Access, Microsoft Excel, and tab-delimited text formats.

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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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Geochemical Database for Iron Oxide-Copper-Cobalt-Gold-Rare Earth Element Deposits of Southeast Missouri, 2016-2017

Sample description, location, and geochemical analysis of Mesoproterozoic igneous rocks and iron oxide-apatite-rare earth element and iron oxide-copper-cobalt-gold deposits in this area. Data are provided in Microsoft Access and tab-delimited text formats.

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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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Technical overview of the U.S. Geological Survey Earth Mapping Resources Initiative (Earth MRI)

The Earth Mapping Resources Initiative (Earth MRI) was developed by the U.S. Geological Survey in response to a Federal directive calling on various Federal agencies to address potential vulnerabilities in the Nation’s supply of critical mineral resourc

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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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Geochemical and Modal Data for Mesoproterozoic Igneous Rocks of the St. Francois Mountains, Southeast Missouri

A compilation of new and previously published geochemical and modal analyses of Mesoproterozoic igneous rocks in this area. Includes major and trace element geochemistry and mineralogical composition as well as sample locations and characteristics. Data for 618 unaltered samples and 549 altered samples are provided as Microsoft Excel and as tab-delimited text.

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Focus areas for data acquisition for potential domestic resources of 11 critical minerals in the conterminous United States, Hawaii, and Puerto Rico—Aluminum, cobalt, graphite, lithium, niobium, platinum-group elements, rare earth elements, tantalum, titanium, and tungsten

Geographic areas within the US where deposits of certain critical mineral resources might be found. With state agencies and other organizations, USGS intends to conduct studies that will help locate critical mineral resources within these areas.

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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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Focus areas for data acquisition for potential domestic resources of 13 critical minerals in the conterminous United States and Puerto Rico—Antimony, barite, beryllium, chromium, fluorspar, hafnium, helium, magnesium, manganese, potash, uranium, vanadiu

The Earth Mapping Resources Initiative (Earth MRI) is conducted in phases to identify areas for acquiring new geologic framework data to identify potential domestic resources of the 35 mineral materials designated as critical minerals for the United State

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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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