TY - RPRT TI - Geologic setting, sedimentary architecture, and paragenesis of the Mesoproterozoic sediment-hosted Sheep Creek Cu-Co-Ag deposit, Helena embayment, Montana AU - Garth E. Graham AU - Murray W. Hitzman AU - Jerry Zieg PY - 2012 DO - 10.2113/econgeo.107.6.1115 UR - https://pubs.usgs.gov/publication/70044799 ID - 70044799 ER -