Compositional Variation of Amphiboles During Magma Mixing: A Case Study of Huangyangshan A-Type Granite in Kalamaili Metallogenic Belt, East Junggar, China

The Huangyangshan A-type granitic pluton, distributed along the thrust fault in Kalamaili region of East Junggar, Xinjiang, China, consists alkaline granite containing abundant dioritic enclaves that formed via magma mixing. Both host and contain sodic amphiboles. textural evidence indicates amphiboles crystallized as a magmatic phase both units. We determined major trace element contents from units to investigate compositional variation during mixing process. results show cations W- C-site are influenced by chemical compositions whereas A-, B- T-site Al 3+ controlled crystal structure. Therefore, variations can reflect evolution. core rim similar patterns, which also suggests late-stage phases. Furthermore, amphibole-only thermometers yield reasonable estimates consistent with petrographic evidence. However, based on partition coefficients all currently available amphibole-based barometers rely or D cannot be applied Fe-rich Al-poor