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Showing 1 to 4 of 4 for “"Colorado Mineral Belt"”.

  1. The Proterozoic ancestry of the Colorado Mineral Belt : ca. 1.4 Ga shear zone system in central Colorado

    The Paleocene to Oligocene magmatism and mineralization that are the Phanerozoic expressions of the Colorado Mineral Belt developed along a NE-trending system of subvertical mylonites and ultramylonites that formed in the Mesoproterozoic and that, in turn, overprinted higher-temperature …

    unm Repository record for The Proterozoic ancestry of the Colorado Mineral Belt : ca. 1.4 Ga shear zone system in central Colorado (opens in a new tab)

  2. Depositional system and source rock potential of the Sharon Springs Formation in Colorado

    … in the Wattenberg Field area of Weld County, Colorado show a progradation of facies to the northeast. Biostratigraphic correlation connects the progradation of these clinoforms, to prograding sandstones on the western margin of the basin associated with the Blackhawk and Castlegate Sandstone. …

    colo-mines Repository record for Depositional system and source rock potential of the Sharon Springs Formation in Colorado (opens in a new tab)

  3. Proterozoic history of the Idaho Springs-Ralston shear zone: evidence for a widespread ca. 1.4 Ga orogenic event in central Colorado, The

    … NE-trending zones within the central-eastern Colorado Front Range. The zone is composed of multiple mylonitic strands of a few meters to several kilometers in width and is mapped from ~16 km NNW of Denver, CO to ~26 km to the SW (near Idaho Springs, CO). The IRSZ and other NE-trending zones …

    colo-mines Repository record for Proterozoic history of the Idaho Springs-Ralston shear zone: evidence for a widespread ca. 1.4 Ga orogenic event in central Colorado, The (opens in a new tab)