Textures, trace element geochemistry and in-situ sulfur isotopes of pyrite from the Xiaojiashan gold deposit, Jiangnan Orogen: Implications for ore genesis

•Three pyrite generations identified from different alteration/ore stages at Xiaojiashan.•Ore fluid is metamorphic- and magmatic-sourced in the early and late stage, respectively.•Gold mineralization related to early metamorphism with magmatic-hydrothermal overprinting.