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Filters Date Range Past year (2) Past month (0) Past week (0) Past day (0) Custom range... To   Search Types Downloadable (3) Map Service (3) OGC WFS Layer (3) OGC WMS Layer (3) Shapefile (3) Contacts Leah E Morgan Geology, Geophysics, and Geochemistry Science Center U.S. Geological Survey U.S. Geological Survey - ScienceBase Cameron M Mercer More... Categories Data (3) Data Release - Revised (1) Tag Types Theme (3) Place (3) USGS Scientific Topic Keyword (3) Harvest Set (3) Tag Schemes none (3) Geographic Names Information System (GNIS) (3) ISO 19115 Topic Category (3) Common geographic areas (1) None (1) USGS Thesaurus (3) NGA GEOnet Names Server (GNS) (1) View Results as: JSON ATOM CSV

Argon and SHRIMP-RG Data for Magmatic Steam Alunite, Sericite, and Zircon from Alunite Ridge and Deer Trail Mountain, Marysvale, Utah Samples of vein-type magmatic-steam alunite were collected over several field seasons from five mines and prospects (L&N, Mt. Edna, Christmas, upper Mineral Products, and Close In) in the Alunite Ridge and Deer Trail Mountain area, Marysvale, Utah, as well as a sample from the Deer Trail mine workings from which sericite was separated. The magmatic-steam alunite and sericite were analyzed by the 40Ar/39Ar method to constrain the timing and duration of magmatic activity associated with the intrusion of two porphyry stocks beneath Alunite Ridge and Deer Trail Mountain. In addition, a sample of a highly altered rhyolitic quartz porphyry dike was collected from the upper Mineral Products mine, from which zircons were... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: "Mineral Resources"], 40Ar/39Ar, Alunite Ridge, Deer Trail Mountain, Denver Argon Geochronology Laboratory, All tags... GGGSC, Geology, Geophysics, and Geochemistry Science Center, MRP, Marysvale, Mineral Resource Program, Piute, SHRIMP-RG U/Pb, Stanford-USGS Micro Analysis Center, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), Utah, ["Economic Geology", geochronology, geoscientificInformation, Fewer tags Argon data for Santa Cruz Basin, Arizona (ver. 1.1, November 2022) This data release includes 40Ar/39Ar data from the U.S. Geological Survey for samples from the Santa Cruz Basin, Arizona. Mineral samples were collected by Kenzie Turner and William Page from the upper Santa Cruz Basin, Arizona. Potassium-bearing mineral grains were separated from the bulk sample and analyzed by argon geochronology at the U.S. Geological Survey Argon Geochronology Laboratory in Denver, Colorado. The data provide age constraints on units in the relevant geologic mapping area. Categories: Data, Data Release - Revised; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: 40Ar/39Ar, Argon Geochronology Laboratory, Arizona, GGGSC, Geochemistry, All tags... Geology, Geophysics, and Geochemistry Science Center, MRP, Mineral Resource Program, Stratigraphy, Structural Geology, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), Volcanology, geologic mapping, geoscientificInformation, Fewer tags Argon data for Hugub Area, Kesem-Kebena-Dulecha, Ethiopia Tephra samples were collected by Leah Morgan (now at the U.S. Geological Survey (USGS)) from the Hugub Area, Kesem-Kebena-Dulecha, Afar, Ethiopia. Sanidine grains were separated from the bulk sample and analyzed by argon geochronology at the Scottish Universities Environmental Research Centre, Scotland. The data indicate that the age of the Hugub Bed, which is rich in archarological artifacts, is ca. 500 ka. These results have broad implications in understanding late Acheulean archaeology in Ethiopia. Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: 40Ar/39Ar, Afar, Argon Geochronology Laboratory, Awash River, East African Rift Valley, All tags... Ethiopia, GGGSC, Geochemistry, Geology, Geophysics, and Geochemistry Science Center, Kesem-Kebena-Dulecha, MRP, Mineral Resource Program, Stratigraphy, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), Volcanology, archeology, biota, geoscientificInformation, Fewer tags