Iron and sulfur isotope fractionation during pyrite dissolution-reprecipitation revealed by in-situ isotopic analyses in the Muping gold deposit (Jiaodong, China)

•Simultaneously in-situ Fe-S isotopes analytical technique was firstly applied.•Formation of pyrite with core-rim texture via dissolved-reprecipitation pathway.•Fe-S isotopes of pyrite all can be modified during fluid alteration.•Fe isotope has an obvious kinetic effect during fluid alteration.