Fluid inclusion characteristics and geological significance of the Xi’ao copper–tin polymetallic deposit in Gejiu, Yunnan Province

The newly discovered Xi’ao Cu–Sn polymetallic deposit is located in the inner alteration zone of the Laochang–Kafang granite edge in Gejiu, Yunnan Province. The mineralization process of this deposit can be divided into four stages. Cassiterite and chalcopyrite mainly formed at stages II and III, respectively. Fluid inclusions at different stages were studied by petrography, microthermometry, and laser Raman spectrometry. Five fluid inclusion...