TY - RPRT TI - The Spar Lake strata-Bound Cu-Ag deposit formed across a mixing zone between trapped natural gas and metals-bearing brine AU - Timothy S. Hayes AU - Gary P. Landis AU - Joseph F. Whelan AU - Robert O. Rye AU - Richard J. Moscati PY - 2012 DO - 10.2113/econgeo.107.6.1223 UR - https://pubs.usgs.gov/publication/70118543 ID - 70118543 ER -