陈会军, 付俊彧, 钱程, 庞雪娇, 钟辉. 东北地区前中生代花岗岩类年龄与时空分布[J]. 地质通报, 2021, 40(6): 827-844.
    引用本文: 陈会军, 付俊彧, 钱程, 庞雪娇, 钟辉. 东北地区前中生代花岗岩类年龄与时空分布[J]. 地质通报, 2021, 40(6): 827-844.
    CHEN Huijun, FU Junyu, QIAN Cheng, PANG Xuejiao, ZHONG Hui. Chronology and spatiotemporal distribution of Pre-Mesozoic granites in northeast China[J]. Geological Bulletin of China, 2021, 40(6): 827-844.
    Citation: CHEN Huijun, FU Junyu, QIAN Cheng, PANG Xuejiao, ZHONG Hui. Chronology and spatiotemporal distribution of Pre-Mesozoic granites in northeast China[J]. Geological Bulletin of China, 2021, 40(6): 827-844.

    东北地区前中生代花岗岩类年龄与时空分布

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

    • 摘要: 通过东北1:150万、1:250万地质编图,系统梳理总结了东北地区花岗岩类时空格局。东北地区的花岗岩类岩石分布广泛,活动时代漫长,从太古宙直到新生代呈多幕式展现。收集、梳理了394件前中生代花岗岩类同位素测年数据,锆石年龄总体上出现3350 Ma,3150 Ma,2550~2450 Ma,2200 Ma,1800 Ma,950 Ma,800 Ma,500 Ma和300 Ma九个明显高峰值和大于3600 Ma,2900~2700 Ma,2400~2250 Ma,2100~1900 Ma,1700~1500 Ma,1400~1300 Ma,和1150~950 Ma 7个空白年龄段,年龄数据的高峰值恰好与研究区基底形成、陆壳生长、超大陆汇聚及分离、地块俯冲、碰撞、拼贴等主要构造事件时间点吻合,反映了研究区构造演化历史。在时空分布上,太古宙花岗岩类主要分布于华北古陆区的辽东鞍山、本溪、清原,辽西建平、锦州,辽南大连和吉南地区;加里东期花岗岩类集中分布在额尔古纳、佳木斯、张广才岭、大兴安岭北端,但在华北古陆上较少;华力西期花岗岩类分布在额尔古纳、大兴安岭主脊、张广才岭—小兴安岭、延边-绥芬河及沿索伦—西拉木伦—长春—延吉一线两侧。

       

      Abstract: 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.

       

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