Geologic Characteristics, Sulfur and Lead Isotope Study of the Shalitashi Lead-zinc Deposit, Southern Tianshan

Abstract

Abstract:

The Shalitashi lead-zinc deposit located in Xinjiang Uygur Autonomous Region, NW China is an important lead-zinc deposit in the southern Tianshan polymetallic metallogenic belt. The deposit occurs in the Paleozoic Maidan-Kuokeshale basin as lens, nested and tubular orebodies within the structure fracture zone in the dolomite of the middle Devonian Tuogemaiti Formation. The alteration is weakly developed in the wall rocks. The dominant sulfide minerals in the ore are sphalerite and galena. The ore structures include open-space filling and host-rock replacement. The δ34S values for the sulfide minerals range from -3.6‰ to -12.0‰ which indicates that the reduced sulfur is derived from the seawater sulfate. The 206Pb/204Pb values for sulfides range from 17.8979 to 17.9625，207Pb/204Pb from 15.5981 to 15.6023，208Pb/204Pb from 31.1863 to 38.1971, which implies that the metals were derived from the sediments with high metal contents in the Paleozoic basin. On the basis of the geology and geochemistry characteristics, the Shalitashi leadzinc deposit can be classified into Mississippi valley-type lead-zinc deposit.

Key words: Shalitashi, southern Tianshan orogeny belt, lead-zinc ore deposit, deposit geology, geochemistry, sulfur and lead isotope

CLC Number:

P618.2

ZHANG Shu, ZHANG ZHao-Chong, HUANG He, ZHANG Dong-Yang, XUE Chun-Ji. Geologic Characteristics, Sulfur and Lead Isotope Study of the Shalitashi Lead-zinc Deposit, Southern Tianshan[J]. Geoscience, 2010, 24(5): 856-865.

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