Quantitative assessment of fluoride enrichment mechanisms and consequent health risks in geothermal waters of the Yishu Fault Zone using hydrochemical and multi-isotopic (H, O, Sr, S) tracers - Luyao Wang; Kai Liu; Shouchuan Zhang; Li Wan; Fangyuan Jiang; Hui Feng; Yaoyao Zhang; Longqiang Zhang; Jialiang Wang (Geothermics, 2026)