Sources of natural gas in the Middle-Permian carbonate succession in the central-northern Sichuan Basin, Southwest China - Chen Shen; Haifeng Yuan; Mingzhi Kuang; Xihua Zhang; Cong Chen; Zixu Ye; Peng Yang; Yuejie Li; Qinren Xiao; Tao Wang; Bingsen Wang (Journal of Asian Earth Sciences, 2024)