Late Paleozoic igneous rocks in the Xing’an Massif and its amalgamation with the Songnen Massif, NE China

摘要: Abstract We present new zircon U–Pb–Hf isotopic and whole-rock geochemical data for late Paleozoic igneous rocks from the Xing’an Massif, Northeast China, to further our understanding of amalgamation Songnen massifs. Zircon laser ablation–inductively coupled plasma–mass spectrometry (LA–ICP–MS) U–Pb ages indicate that magmatism occurred in Massif over three stages: during early Carboniferous (359–352 Ma), (327–320 Ma), Carboniferous–early Permian (307–295 Ma). The are mainly quartz diorite, granodiorite, monzogranite, syenogranite, rhyolite, formed an active continental margin setting related westward subduction Heihe–Nenjiang oceanic plate. monzogranites medium-K calc-alkaline I-type granitoids, with eHf(t) values +5.6 +13.0 TDM2 973–502 Ma, suggesting primary magma was derived partial melting newly-accreted crust. collisional setting, marking intrusive dominated by alkali-feldspar granite, granite porphyry. large volume alkali feldspar granites A-type suggested they a post-collisional extensional environment.