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This data release includes laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) U-Pb zircon geochronology data to determine the ages of Challis igneous rocks in the Thunder Mountain volcanic field and dikes west of the volcanic field, especially in and near the Stibnite-Yellow Pine mining district, ID. These efforts were made to help understand the stratigraphy and lithologic characteristics of the Challis igneous rocks by determining their absolute ages.
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Geologic mapping, characterization of geologic structures, and sampling for geochronology was completed in two areas of the northwestern Sangre de Cristo Mountains from 2011 through 2017. This data release provides the raw analytical data, metadata and sample information for 20 zircon U-Pb age analyses from laser ablation-inductively coupled plasma mass spectrometry (LA-ICPMS). The two areas include the Poncha Pass area where the entire 71/2’ Poncha Pass quadrangle and parts of five other quadrangles (Mount Ouray, Maysville, Salida West, Salida East, and Wellsville) were mapped at a scale of 1:24,000 (see Minor and others, 2019). The Deadman thrust fault is the second area, approximately 80 km southwest of the Poncha...


    map background search result map search result map U-Pb zircon data for: The Poncha Pass and Deadman Creek areas, northern Sangre de Cristo Mountains of south-central Colorado U-Pb zircon geochronology data from Eocene igneous rocks in the Stibnite-Yellow Pine mining district and vicinity, Idaho U-Pb zircon geochronology data from Eocene igneous rocks in the Stibnite-Yellow Pine mining district and vicinity, Idaho U-Pb zircon data for: The Poncha Pass and Deadman Creek areas, northern Sangre de Cristo Mountains of south-central Colorado