Element geochemistry of ore-bearing rock series in the Getang gold deposit, Guizhou Province

Abstract：The Getang gold deposit in Guizhou Province has large reserves, high grade, special formation circumstances, and typical double ore-controlling characteristics： one is the horizon, and the other is the karst unconformity. There are varied (silicification, tectonic) breccias, low-temperature hydrothermal minerals (realgar, orpiment, stibnite and fluorite etc.) and wall rock alteration mineral assemblages in the ore-bearing rock of the Getang gold deposit. Its hydrothermal ore-forming stage can be divided into two metallogenic stages. The first is the main ore-forming stage—pyrite stage and the second is the late ore-forming stage—fluorite stage. Based on a systematic study of trace elements (Co/Ni and Th/U), REE, sulfur isotopes (pyrite and stibnite) composition characteristics of single minerals (pyrite and fluorite) and ore-bearing rocks (horizon), the authors tentatively hold that the Getang gold deposit possesses normal seawater sedimentation characteristics, its ore-bearing layer was developed in a marine and poor oxygen environment, and the initial ore-forming material was probably related to Emeishan basalt activity, but late deep material may have had contributions to mineralization for further enrichment of Au.