WEI Zhong-lin1, LI Bo1, LUO Kai2, YANG En-qi1, WANG Lian-lei3, ZHAO Chun-sheng3
(1. Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650000, China;
2. State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;
3. Yunnan Lancang Lead Mineral Co. Ltd, Lancang 665601, China)
Abstract: Luoboshan Pb-Zn Deposit, a typical Pb-Zn deposit in Lanping-Simao Basin, is located in the southern section of Sanjiang area. In this paper, we studied the source and formation mechanism of sulfur in the ore-forming fluids. Results show that the δ34S values of studied sulfide minerals are concentrated in the range from -8.83‰ to 1.61‰, which are different from those of the typical mantle-derived sulfur (-3‰ to 3‰) and the marine evaporates (15‰ to 25‰) in Simao Basin, but are similar to those of biological origin sulfur. Therefore, the sulfur in the ore-forming fluids of Luoboshan Pb-Zn deposit may be mainly derived from the seawater sulfate, and the formation mechanism is the bacterial reduction (BSR).
Key words: sulfur isotope; geochemistry; Luoboshan Pb-Zn deposit
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ACTA MINERALOGICA SINICA Vol. 35, No. 4, 2015, Page 453-456
