Chronology and spatiotemporal distribution of Pre-Mesozoic granites in northeast China

Based on the 1:1 500 000 scale and 1:2 500 000 scale geological mapping, the spatial and temporal pattern of granitoids in northeast China is systematically summarized.The granitoids in northeast China are characterized by wide distribution and long active age with multistage from Archean to Cenozoic.The zircon dating of 394 samples reveals 9 distinct peaks of ages, namely 3350 Ma, 3150 Ma, 2550~2450 Ma, 2200 Ma, 1800 Ma, 950 Ma, 800 Ma, 500 Ma, and 300 Ma, and seven blank segments, namely > 3600 Ma, 2900~2700 Ma, 2400~2250 Ma, 2100~1900 Ma, 1700~1500 Ma, 1400~1300 Ma and 1150~950 Ma.The peak value of data coincides with the time points of major tectonic events such as basement formation, continental crust growth, supercontinental convergence and separation, subduction, collision and collage, reflecting the tectonic evolution history of the study area.In terms of spatial and temporal distribution, Archean granites are mainly distributed in Anshan, Benxi, Qingyuan of eastern Liaoning, Jianping and Jinzhou in western Liaoning, Dalian in southern Liaoning and southern Jilin.Caledonian granitoids are concentrated in the northern part of Erguna, Jiamusi, Zhangguangcailing and Greater Khingan Range, but a few in the North China craton.Variscan granitoids are distributed in Erguna, Daxinganling main ridge, and two sides of Zhangguangcailing-Xiaoxinganling line, Yanbian-Suifen River line and Soren-Silamulun-Changchun-Yanji line.