Geochemistry and Zircon U–Pb Geochronology of the Zhuxi Granites in the Jingdezhen Area, Jiangxi Province, China: Implications for the Mesozoic Tectonic Development of South China

Mesozoic granitic magmatism in Northeastern Jiangxi, China is of tectonic significance for the evolution South Block. Whole-rock geochemical and zircon U–Pb geochronological Lu–Hf isotopic data Zhuxi granites Jingdezhen area Jiangxi were presented. The are composed granodiorite, biotite granite, two-mica granite. Zircon LA–ICP–MS analyses indicated emplacement at 159–147 Ma. characterized by a strongly peraluminous nature with high A/CNK values (>1.1), SiO2 (66.09–74.46 wt.%) K2O (3.50–5.52 contents, depletion Ba, Nb, Ce, Sr, Ti, moderately negative Eu anomalies (Eu/Eu* = 0.40–0.63), enrichment LREE, HREE ((La/Yb)N > 7.43). 1.1, widespread aluminum-rich minerals (e.g., muscovite tourmaline), indicating they S–type belong to muscovite–bearing (MPG). exhibited εHf(t) (−9.9 −3.7) TDM2 model ages 1840–1442 Ma derivation from ancient crustal sources. magma possibly caused subsequent process intracontinental subduction. It inferred that was associated oceanic–continental convergence Paleo–Pacific Eurasian plates as well subduction Yangtze Cathaysia blocks. highlight primary role early Yanshanian granitoid China.