摘要
The Hengshan Complex in the central zone of the North China Craton, which is a typical high-grade terrain and experienced 1.85 Ga high-pressure granulite facies metamorphism, composes of ~2.5 Ga TTG gneisses and some paragneisses. A suite of potassic granites in this complex is investigated, which mainly consists of hornblende monzogranitie and biotite monzogranite. Zircon grains from a hornblende monzogranite sample yield a weighted average 207Pb/206Pb age of (2 052±17) Ma by LA-ICP-MS and (2 084±4) Ma by SIMS. This paper confirms a Paleoproterozoic (~2.1 Ga) crust remelting event in Hengshan Complex, which may occur in an extensional setting in the North China Craton.