Reconnaissance study on sulfur isotopic ratios of lead-zinc ores from North Vietnam

Shunso Ishihara, Tuan Anh Tran, Kezhang Qin
2010 BULLETIN OF THE GEOLOGICAL SURVEY OF JAPAN  
Sulfur isotopic ratios were studied on representative lead-zinc feeding ores, zinc concentrates and lead concentrates from selected mines in North Vietnam. These sulfi des from the Triassic rhyolite hosted ore deposits have 34 S values of 3.4 to 4.7 ‰, while those from purely Paleozoic sedimentary host rocks are slightly heavier, ranging from 4.4 to 8.2 ‰. No 34 S values similar to those of the Mississippi Valley-type lead-zinc ores have been found. Lead concentrates are always smaller than
more » ... ys smaller than zinc concentrates in the 34 S values. Two very depleted 34 S values were found in the Cho Dien mine area where detailed isotopic study is necessary.
doi:10.9795/bullgsj.61.485 fatcat:5u7qrajmpbcphgtap2p5mr22lq