In-situ sulfur isotope and microscopic analyses reveal multiple pyrite genesis mechanisms in the early Ediacaran Doushantuo Formation, South China - Shiqi Cheng; Lianjun Feng; Guoqiang Tang; Yan Liu; Hao Qiu; Qiuli Li; Xuelei Chu; Xingliang Zhang; Jinhua Li (Chemical Geology, 2026)