Original ResearchPublished 2 October 2026Gas preservation conditions of Cambrian Niutitang formation shale in western margin of Xuefeng uplift, SE China-based on the analysis of paleofluidZhiwei Fan · Xiang Ge · Jing Han · Qingqing Lei · Hao Wu · Yi ZhangFrontiers in Earth Sciencedoi 10.3389/feart.2026.1958365