Open Apatite Sr Isotopic System in Low‐Temperature Hydrous Regimes

Single crystal in situ Sr and Nd isotopic analysis of apatite permits more accurate interrogation of a variety of geoscience questions, including provenance, petrogenesis, and ore system evolution. However, the degree to which the apatite Sr and Nd isotopic systems remain closed under extended low‐temperature hydrous conditions is not well constrained. Granitoids at the Baogutu deposit in NW China contain veins of low‐temperature H 2 O‐rich...