DONG Chuan-qi¹, HU Yu-zhao^1,2*, REN Tao^1,2,ZHANG Yu-han¹, HE An-bei¹, LIU Chang-wei¹

 

(1. Kunming University of Science and Technology, Kunnming 650093, China;
2. Yunnan Mineral Resources Laboratary,Kunming 650093, China)

 

Abstract: Uragen Pb-Zn ore deposit is hosted by Mesozoic-Cenozoic strata of Kash depression in the northwestern margin of the Tarim Basin. The sulfide δ34SV-CDT of Uragen Pb-Zn ore deposit varies from -25.9‰ to 27.5‰, with a wide distribution range. In this paper, S istopic compositions of sulfides from ore bodies in the ore deposit were systematically determined so as to discuss the source of ore-forming material and the genesis or the ore deposit. The characteristics of sulfur isotopes indicate that Uragen deposit has mixed sulfur, and basin fluid activities involves in the reduction and biological effect from the marine sulphate. A large number of celestite, barite, gypsum and other sulfate minerals in Cenozoic sedimentary basins in the western margin of Tarim Basin has provided sufficient sulfur source for lead-zinc mineralization of Pb-Zn ore deposit. In the mineralization process, metallic matter in basin fluid combind with the bacteria reduction of sulfate from the dissolving gyprock lead to sulfide precipitation and mineralization. Uragen Pb-Zn ore deposit is a sandstone and conglomerate type Pb-Zn ore deposit.

 

Keywords: Wulagen Pb-Zn deposit；sulfur isotope；sandstone and conglomerate type Pb-Zn ore deposit；genesis

 

ACTA MINERALOGICA SINICA Vol. 37, No. 5, 2017, Page 653-660