Multistage pyrite in the Getang sediment-hosted disseminated gold deposit, southwestern Guizhou Province, China: Insights from textures and in situ chemical and sulfur isotopic analyses

摘要

Getang is a representative sediment-hosted disseminated gold (SHDG) deposit in the southwestern Guizhou Province, China. The majority of gold is present as structurally bound Au+ in pyrite, with a minor amount occurring as nanoparticles (Au-0). Four generations of pyrite (Py0, Pyl, Py2, and Py3) were distinguished based on morphology and paragenesis. Electron microprobe (EMP), laser-ablation inductively coupled plasma mass spectrometry (LA-ICP-MS), and laser-ablation multi-collector inductively coupled plasma mass spectrometry (LA-MC-ICP-MS) analyses were conducted to determine the chemical and sulfur isotopic composition of the pyrite.