TY - RPRT TI - U-Pb isochron age and Pb isotope systematics of the Golden Fleece vein; implications for the relationship of mineralization to the Lake City caldera, western San Juan Mountains, Colorado AU - K. Hon AU - K.R. Ludwig AU - K. R. Simmons AU - J. F. Slack AU - R. I. Grauch PY - 1985 DO - 10.2113/gsecongeo.80.2.410 UR - https://pubs.usgs.gov/publication/70012965 ID - 70012965 ER -