| signatures of gold may be useful in searching for porphyry Cu deposits. Signatures from Butte (Montana),...the Ag content of placer gold in the Tarryall district of Colorado differed from that of nearly all of...has been suggested as a pathfinder element for porphyry Cu deposits (Learned and Boisson, 1973). Our objective...determine a signature except in the study of the porphyry Cu deposits, no more gold was available for that...depth as in the Diana mine from the Atlantic City district, Wyoming. Ag, on the other hand, is highest in |
