Magmatic Processes of Granitoids in the Hongniu-Hongshan Porphyry-Skarn Copper Deposit, Southern Yidun Terrane, China: Evidence from Mineral Geochemistry

The Hongniu-Hongshan porphyry-skarn deposit is located in the southern Yidun terrane Sanjiang Tethyan Metallogenic Domain (STMD). Although its metallogenesis has been well constrained past decade, magmatic processes for granitoids are still poorly understood. Herein, we provide new geochemical data on minerals (plagioclase, amphibole, and clinopyroxene) to get a better insight into these processes. complex zoning patterns of plagioclase phenocrysts indicate magma recharge mixing. Physiochemical estimations that clinopyroxenes were crystallized hotter (919 ± 11 °C) more mafic (FeO: 2.8–4.6 wt.%, MgO: 0.8–1.8 wt.%) magmas deep chamber (18.6 0.9 km) compared with colder (819 29 °C), felsic 0.9–2.2 0.3–0.6 shallow (13.4 1.6 which amphiboles crystallized. Therefore, suggest produced by multistage within upper–middle crust range. In this model, deep-seated recharged reservoir mixed therein. hot may heat sources rejuvenate reservoirs. On basis, further infer ore-forming materials could be pre-concentrated crustal range mobilized Late Cretaceous magmatism terrane.