Abstract

50 veins classified into three types: arsenopyrite dominated, stibnite dominated, and base metals + arsenopyrite dominated. Type I veins are enriched in Au, type III are enriched in Au + Ag, and type II are poor in Au but slightly enriched in Ni and Pd. Fluid inclusion data indicate deposition of type I veins from CO 2 -rich, low-salinity fluids at temperatures above 300 degrees C. Type II Au-poor veins were deposited from relatively saline, low-CO 2 fluids at temperatures below 220 degrees C. Pressures of 900 to 1,500 bars. Gold mineralization is considered to have resulted from a temperature drop through 300 degrees C--Modified journal abstract

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