Zircon U-Pb Ages and Geochemistry of the Granite in the Xintianling Tungsten Deposit, SE China: Implications for Geodynamic Settings of the Regional Tungsten Mineralization

The Xintianling tungsten deposit is a super-large in the Nanling tungsten–tin mineralization belt, which genetically associated with early-stage hornblende-biotite monzonitic granite of Qitianling pluton. orebodies predominantly occur as veins and lenses within skarn rocks between limestone (Shidengzi group). In this work, whole-rock major trace elements zircon U–Pb ages were studied an attempt to investigate geochronological framework, petrogenesis, tectonism, metallogenesis regard deposit. petrographic geochemical analyses indicated that consists three intrusive units medium- coarse-grained biotite granite, fine-grained porphyry, was strongly mineralization. Biotite are highly K-calc-alkaline weakly peraluminous, A/CNK ratios ranging from 0.99 1.05. Late-granite porphyry aluminum-supersaturated high evolution degree, whose characteristics suggest it either I- or S-type granite. LA-ICP-MS U-Pb dating revealed (162.3 ± 1.2 Ma, MSWD = 1.3), (161.8 1.3 1.8), (154.3 1.6 2.4) formed late Jurassic. emplacement A-type tungsten-tin polymetallic continuous process, they products large-scale middle–late Jurassic (150–160 Ma). Under tectonic setting Mesozoic lithospheric extension, asthenosphere upwelling along deep-fault, intensive mantle–crust interaction processes probably provide not only heat flow, but also partly mantle-derived material for W-Sn-polymetallic area.