The Sulphosalt Mineral Series and Their Paragenetic Association in the Changpo Cassiterite-Sulphide Deposit, Zhuang Autonomous Region of Guangxi

Abstract

The ore deposit is dominated by Pb-Sb sulphosalt minerals accompanied by various Sb, Bi sulphosalt minerals of Pb, Ag, Cu, and Sn. The 22 species of sulphosalt minerals and the 9 species of rare sulphides associated with them, as well as the natural elements, have been identified in this paper. Of them, the 23 species including 17 species of sulphosalt minerals and other associated minerals were discovered for the first time in the Dachang ore field. Based on the paragenesis of the minerals, different types of sulphosalt minerals assemblages have been preliminarily determined. Based on the temporal and spatial evolutionary relationship of the mineral assemblages and the ore-forming element assemblages, the zoning pattern of the deposit has been worked out. It exhibited normal characters at the early stage and reverse zoning at the late stage. The sulphosalt minerals were all formed in the late stage and the difference in their species and their paragenesis is a qualitative indicator of the difference in the concentration of the components in the ore-forming fluids.