Tracing hydrothermal fluid evolution of the Tongshankou skarn–porphyry Cu–Mo–W deposit (Eastern China) using integrated infrared spectroscopic characteristics and magnetic susceptibility - Shili Peng; Shitao Zhang; Hao Xu; Gaobin Chu; Longfei He; Yu Zhang; Hua Zhang; Rucao Li; Yihui Lyu; Di Ding; Siyuan Zhang; Haisen Huang (Journal of Asian Earth Sciences, 2026)