Petrogenesis of the Late Ordovician Penggongmiao biotite monzogranite in southern Hunan, south China: constraints from geochronology, geochemistry, and Sr–Nd–Hf isotopes

The Penggongmiao complex pluton, located in the Nanling metallogenic belt of South China, provides a critical record of Early Paleozoic (Caledonian) magmatism, but the genesis and mineralization potential of the biotite monzogranite of the pluton have not been constrained. This study presents new whole-rock geochemistry, zircon U–Pb ages, and Sr–Nd–Hf isotopic data for the Penggongmiao biotite monzogranite to constrain its timing, origin, and metallogenic potential. Zircon U–Pb dating yields a w