Mechanisms of organic matter accumulation during Early Silurian carbon-cycle perturbations: Geochemical constraints from the inner shelf, Upper Yangtze, South China - Weizhen Chen; Jingchun Tian; Xiaobing Lin; Kailong Feng; Qingshao Liang; Wei Yu; Xing Wang; Shi Sun (Palaeogeography, Palaeoclimatology, Palaeoecology, 2026)