TY - RPRT TI - Application of U-Th-Pb phosphate geochronology to young orogenic gold deposits: New age constraints on the formation of the Grass Valley gold district, Sierra Foothills province, California AU - Ryan D. Taylor AU - Richard J. Goldfarb AU - Thomas Monecke AU - Ian R. Fletcher AU - Michael A. Cosca AU - Nigel M. Kelly PY - 2015 DO - 10.2113/econgeo.110.5.1313 UR - https://pubs.usgs.gov/publication/70148368 ID - 70148368 ER -