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Filters Date Range Past year (1) Past month (0) Past week (0) Past day (0) Custom range... To   Search Extensions Shapefile (3) Types Map Service (3) OGC WFS Layer (3) OGC WMS Layer (3) Shapefile (3) Contacts Bradley S Van Gosen Geology, Geophysics, and Geochemistry Science Center Danielle A Olinger U.S. Geological Survey - ScienceBase Energy and Minerals More... Categories Data (3) Tag Types Theme (3) Place (3) USGS Scientific Topic Keyword (3) Harvest Set (3) Tag Schemes none (3) USGS Thesaurus (3) Geographic Names Information System (GNIS) (2) None (1) Common Geographic Areas (2) ISO 19115 Topic Category (2) USGS Metadata Identifier (1) View Results as: JSON ATOM CSV

Geochemical data for alkaline igneous rock units in the Cripple Creek district, Colorado USA: 1989-2016 This data release includes new major and trace element geochemical data acquired by the U.S. Geological Survey (USGS) for igneous rocks in the Cripple Creek district in Colorado. Cripple Creek is among the largest epithermal districts in the world, with more than 800 metric tons (t) Au (>26.4 Moz). The ores are associated spatially, temporally, and genetically with ~34 to 28 Ma alkaline igneous rocks that were emplaced into an 18 km2- diatreme complex and surrounding Proterozoic rocks (Kelley and others, 2020). Igneous rocks associated with Cripple Creek are part of a regionally extensive episode of Oligocene alkaline magmatism that extended southward along the axis of the Rio Grande rift through New Mexico and... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Colorado, Cripple Creek, Economic Geology, Economic geology, Fire Assay, All tags... GGGSC, Geochemistry, Geochemistry, Geology, Geophysics, and Geochemistry Science Center, Great Plains margin deposits, ICP-AES, ICP-MS, Inductively Coupled Plasma-Atomic Emission, Inductively Coupled Plasma-Mass Spectrometry, MRP, Metallic mineral resources, Mineral Resources, Mineral Resources Program, Mineral resources, New Mexico, Proterozoic rocks, Rio Grande rift, Tellurium, Trans Pecos region, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), WDXRF, Wavelength Dispersive X-Ray Fluorescence, chemical analysis, geoscientificInformation, mineral deposits, Fewer tags Whole-rock geochemical data for alkaline intrusive rocks in the Wet Mountains area of Custer and Fremont Counties, south-central Colorado, USA This data release contains the whole-rock major and trace element analyses of 51 samples of intrusive igneous rocks from the Wet Mountains area of Custer and Fremont counties of south-central Colorado, collected by U.S. Geological Survey (USGS) geologists. The samples were collected from breccias, veins and thin dikes, and a variety of carbonatite, felsic, mafic, and ultramafic intrusions across the area. The first 41 samples listed in this data release were collected in July 2007, originally as part of a reconnaissance study of the thorium deposits of the area (Van Gosen and others, 2009). The samples are grab samples from outcrops, shallow open-pit excavations, and mineral prospect trenches. The last 10 samples... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Colorado, Custer County, DOI, Democrat Creek, Department of the Interior, All tags... Economic Geology, Energy and Minerals Mission Area, Fremont County, GGGSC, Gem Park, Geochemistry, Geology, Geophysics, and Geochemistry Science Center, ICP-AES, ICP-MS, Inductively Coupled Plasma-Atomic Emission Spectrometry, Inductively Coupled Plasma-Mass Spectrometry, Iron Mountain, MRP, McClure Mountain, Mineral Resources, Mineral Resources Program, Region 7: Upper Colorado Basin, U.S. Geological Survey, USA, USGS, USGS Science Data Catalog (SDC), USGS:5e7130b3e4b01d50926823f3, United States of America, WDXRF, Wavelength Dispersive X-Ray Fluorescence Spectrometry, Wet Mountains, data release, economic geology, geochemistry, geology, geoscientificinformation, mass spectroscopy, metallic mineral resources, mineral resources, rare earth elements, south-central Colorado, thorium, Fewer tags Carbonatite whole-rock and calcite geochemistry from the Bear Lodge alkaline complex, Wyoming and Mountain Pass mine, California Whole-rock and calcite geochemical data are reported for twelve carbonatite samples collected from the Bear Lodge alkaline complex, Wyoming and from the Mountain Pass mine, California. Calcite geochemical data was collected using electron microprobe and laser ablation inductively coupled plasma-mass spectrometry (LA-ICP-MS) analyses. Reported whole-rock data was measured by inductively coupled plasma-optical emission spectrometry (ICP-OES), inductively coupled plasma-mass spectrometry (ICP-MS), ion selective electrode-fluoride (ISE-F), and wavelength dispersive X-ray fluorescence (WDXRF). Geochemical data are presented in downloadable .csv files. Spatial data of sample collection sites are provided as polygons in... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Bear Lodge Mountains, Black Hills, California, California, Carbonatite, All tags... Crook County, Economic Geology, GGGSC, Geochemistry, Geology, Geophysics, and Geochemistry Science Center, ICP-MS, ICP-OES, ISE-F, Inductively coupled plasma-mass spectrometry, Inductively coupled plasma-optical emission spectrometry, Ion selective electrode-fluoride, LA-ICP-MS, Laser ablation inductively coupled plasma-mass spectrometry, MRP, Microprobe, Mineral Resources Program, Mountain Pass mine, REE, Rare earth elements, San Bernardino County, USGS, USGS Science Data Catalog (SDC), United States Geological Survey, WDXRF, Wavelength dispersive X-ray fluorescence, Wyoming, Wyoming, geochemistry, rare earth elements, Fewer tags