The Occurrence and
Distribution of Gold in the Sto. Tomas II Cu-Au Porphyry Deposit
Tomas II Ore Body of Philex Mining Corporation is a copper-gold
porphyry deposit where the average Cu:Au content ratio is 1:2.5. The
gold is mainly associated with the copper sulfides with higher
affinity to bornite than chalcopyrite. It occurs in native form,
very pure, 90% to 97% Au by weight with silver making up only 1% to
3%. The gold also contains traces of palladium and platinum.
paper aims to present the occurrence and distribution of gold in the
Sto. Tomas II deposit. It also aims to discuss the occurrence of
platinum-group minerals (PGM).