Geological, fluid inclusion, and H-O-S-Pb isotopic studies of the Xiaban epithermal gold deposit, Fujian Province, southeast China: Implications for ore genesis and mineral exploration

•The Xiaban gold deposit is a low-sulfidation epithermal gold deposit.•Dominated by a quartz + sericite + illite + chalcedony alteration assemblage.•Mineralization was formed from low-temperature and low-salinity fluids.•Isotope data indicate that ore-forming fluids were predominantly of meteoric origin.•Gold deposition was caused by mixing of dominant meteoric and minor magmatic fluids.