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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...
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This dataset contains reflectance and transmission spectra of unexpanded and expanded vermiculite ore, and handpicked flakes of phlogopite, hydrobiotite, and vermiculite. These samples were collected from mines near Enoree, South Carolina; Libby, Montana; Louisa, Virginia; Palabora, Llano, Texas; and South Africa. Spectra are identified as either reflectance or transmission in the alphanumeric file names and correlate to specpr record numbers designated in the manuscript figures in which they are shown. These transmission spectra were converted to absorbance in many of the figures. Spectra of talc, fibrous richterite amphibole, and serpentine are from well characterized samples from Feiser Mine, Ruby Mountains,...
Site of known mineral extraction or exploration recorded in IGS Mines and Prospects Database and Mines web application. To access attribute data including references, downloadable media for this property, or more information please visit links provided.
Site of known mineral extraction or exploration recorded in IGS Mines and Prospects Database and Mines web application. To access attribute data including references, downloadable media for this property, or more information please visit links provided.
Site of known mineral extraction or exploration recorded in IGS Mines and Prospects Database and Mines web application. To access attribute data including references, downloadable media for this property, or more information please visit links provided.
Site of known mineral extraction or exploration recorded in IGS Mines and Prospects Database and Mines web application. To access attribute data including references, downloadable media for this property, or more information please visit links provided.
Site of known mineral extraction or exploration recorded in IGS Mines and Prospects Database and Mines web application. To access attribute data including references, downloadable media for this property, or more information please visit links provided.
Site of known mineral extraction or exploration recorded in IGS Mines and Prospects Database and Mines web application. To access attribute data including references, downloadable media for this property, or more information please visit links provided.
Site of known mineral extraction or exploration recorded in IGS Mines and Prospects Database and Mines web application. To access attribute data including references, downloadable media for this property, or more information please visit links provided.
Site of known mineral extraction or exploration recorded in IGS Mines and Prospects Database and Mines web application. To access attribute data including references, downloadable media for this property, or more information please visit links provided.
Site of known mineral extraction or exploration recorded in IGS Mines and Prospects Database and Mines web application. To access attribute data including references, downloadable media for this property, or more information please visit links provided.
Site of known mineral extraction or exploration recorded in IGS Mines and Prospects Database and Mines web application. To access attribute data including references, downloadable media for this property, or more information please visit links provided.
Site of known mineral extraction or exploration recorded in IGS Mines and Prospects Database and Mines web application. To access attribute data including references, downloadable media for this property, or more information please visit links provided.
Site of known mineral extraction or exploration recorded in IGS Mines and Prospects Database and Mines web application. To access attribute data including references, downloadable media for this property, or more information please visit links provided.
Site of known mineral extraction or exploration recorded in IGS Mines and Prospects Database and Mines web application. To access attribute data including references, downloadable media for this property, or more information please visit links provided.
Site of known mineral extraction or exploration recorded in IGS Mines and Prospects Database and Mines web application. To access attribute data including references, downloadable media for this property, or more information please visit links provided.
Site of known mineral extraction or exploration recorded in IGS Mines and Prospects Database and Mines web application. To access attribute data including references, downloadable media for this property, or more information please visit links provided.
Site of known mineral extraction or exploration recorded in IGS Mines and Prospects Database and Mines web application. To access attribute data including references, downloadable media for this property, or more information please visit links provided.
Site of known mineral extraction or exploration recorded in IGS Mines and Prospects Database and Mines web application. To access attribute data including references, downloadable media for this property, or more information please visit links provided.


map background search result map search result map Spectra Used in Figures Geochemical data for alkaline igneous rock units in the Cripple Creek district, Colorado USA: 1989-2016 CH0370: Virginia Dare Prospect CH0372: Arizona Prospect CH0374: Toolie Mine CH0375: Cave Mine CH0384: Beardsley Mine CH0389: Unnamed prospect CH0391: Hoosier Mine, McGregor Group CH0402: Charles Dickens Mine CH0408: Red Rock Prospect CH0419: Pilot-Beecher, Pilot, Copper Lode, Mountain King CH0424: Vishneo Lode, Vishneu CH0433: Black Mine, Oxarna Mine, American Dollar Mine CH0439: Dorothy Prospect, Dorthy CH0441: Combination CH0471: Wonder 19 Extended CH0474: Iron Crown Mine CH0476: Bronco Mine, Ape,x Golden Nugget, Mountain Girl Geochemical data for alkaline igneous rock units in the Cripple Creek district, Colorado USA: 1989-2016 Spectra Used in Figures