Hydrogeochemical characteristics and geological controls of thermal springs in the Chengde Area, North China - Yixuan Wang; Xun Zhou; Jingru Ma; Bin Fang; Ye Shen; Ruige Chen; Yanqiu Wu; Yanxiang Shi; Mengying Chen; Qiqi Liu; Tong Zhang; Guangbin Tao; et al. (Geothermics, 2026)