Pyrite and magnetite Re–Os isotope systematics at the Laoshankou Fe–Cu–Au deposit in the northern margin of the East Junggar terrane, NW Xinjiang, China: Constraints on the multistage mineralization and metal sources

The northern margin of the East Junggar terrane is highly prospective for Fe–Cu–Au mineralization. However, due to the lack of precise mineralization ages, intensive debates regarding ore genesis existed. In this study, pyrite and magnetite Re–Os isotopes are first used to determine the metallogenic ages and possible genetic links with magmatism at the Laoshankou deposit, the most important Fe–Cu–Au deposit in the region. Magnetites from Fe...