post-mineralization age basalts overlying cupriferous pyrite deposits in Cyprus in 1967, together with the more...the Ag content of placer gold in the Tarryall district of Colorado differed from that of nearly all of...depth as in the Diana mine from the Atlantic City district, Wyoming. Ag, on the other hand, is highest in...Colorado (contact metamorphic) Round Mountain District, Nevada (epithermal) Dixie Mine, Colorado (supergene...zoning patterns in the Central City gold mining district, Gilpin County, Colorado (Sims et al., 1963) as |