Uranium-thorium analysis

Radiometric dating technique used to determine the age of earth materials based on determining the ratio of uranium-238 to the decay product thorium-230. The ratio is compared to the known half-life of the uranium isotope.
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Geochemical data for the Thunder Mountain volcanic field and dikes in the Stibnite-Yellow Pine district region

Whole rock geochemical data for volcanic rocks in this area, both extrusive rocks and hypabyssal dikes. Major oxides and trace elements are included. Data are provided in CSV format.

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Geologic map of Alaska

Digital compilation and reinterpretation of published and unpublished geologic mapping of Alaska.

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Geologic map of Alaska

Digital compilation and reinterpretation of published and unpublished geologic mapping of Alaska.

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National Geochronological Database

Radiometric ages of geological materials by K-Ar, Rb-Sr, Sm-Nd, fission track, and U-Th-Pb dating methods. A revision of DDS-14 correcting locations and providing the data in more convenient formats.

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National Geochronological Database

Radiometric ages of geological materials by K-Ar, Rb-Sr, Sm-Nd, fission track, and U-Th-Pb dating methods. A revision of DDS-14 correcting locations and providing the data in more convenient formats.

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Preliminary map of the uranium provinces in the conterminous United States

Scanned image of map drawn at 1:5,000,000 scale, projection probably Lambert Conformal Conic, monochrome.

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U-Pb Isotopic Data and Ages of Detrital Zircon from Selected Rocks from Southwestern Alaska and the Yukon-Tanana Upland and Environs of Eastern Interior Alaska and Eastern Yukon, Canada

Geochronology data obtained through radiometric dating of rocks in this area. Data are provided in CSV format.

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USGS Geochron: A Database of Geochronological and Thermochronological Dates and Data

Published ages, dates, analytical information, sample metadata including location, and source citations. The following analytical techniques are represented in the data set: 40Ar/39Ar, K-Ar, U-Th-Pb, Sm-Nd, Rb-Sr, Lu-Hf, fission track, and luminescence. Data are provided in CSV format.

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