中国板块构造格局在早古生代末的重大转变  

Key Transition of Chinese Plate Configuration at the End of Early Paleozoic

作　　者：黄少英[1] 谢会文[1] 侯贵廷 杨宪彰[1] 罗彩明[1] 张昊 仲子奇 夏金凯 李祥 常海宁 Huang Shaoying;Xie Huiwen;Hou Guiting;Yang Xianzhang;Luo Caiming;Zhang Hao;Zhong Ziqi;Xia Jinkai;Li Xiang;Chang Haining(Institute of Petroleum Exploration and Development,Tarim Oilfield Company,Korla 841000,China;Key Laboratory of Orogenic Belts and Crustal Evolution,School of Earth and Space Sciences,Peking University,Beijing 100871,China)

机构地区：[1]塔里木油田勘探开发研究院,新疆库尔勒841000 [2]造山带与地壳演化重点实验室,北京大学地球与空间科学学院,北京100871

出　　处：《地球科学》2023年第4期1321-1329,共9页Earth Science

基　　金：塔里木油田分公司基础地质研究课题(No.041019120067).

摘　　要：板块构造格局是大地构造的基础科学问题,涉及到大尺度的盆山关系,控制了洋陆格局、造山带和盆地的形成与演化,因而可以用来揭示大洋关闭、造山隆升的过程.早古生代末是中国3个板块的构造格局发生重大转变的关键时期.基于经高置信度遴选的古地磁数据和全球古地磁数据库,结合大地构造比较学的地质亲缘性对比分析,利用GPlate软件重建了晚前寒武纪至早古生代的全球板块构造格局,提出奥陶纪末-志留纪是中国3个板块格局发生重大转变的关键时期,440 Ma之前,中国3个板块的空间格局是N-S/T格局(即华北在西、华南在东北,塔里木在东南),440 Ma后中国3个板块的空间格局转为T-N/S格局(即塔里木在西、华北在东北,华南在东南),并一直持续到现今中国3个板块的格局.这个重大转变与晚前寒武纪罗迪尼亚超大陆的裂解和早古生代末中国3个板块之间的洋陆格局变迁密切相关,是从伸展的大地构造环境向缩短的大地构造环境转变的结果.The plate configuration is the basic geological question in the tectonics,which considers the large scale basin-orogen relationship,and controls the configuration of oceans and continents,origin and evolution of basin-range provinces,and has also been applied to uncover the close of ocean and uplift of mountains.The end of Early Paleozoic is the key transition period of Chinese three plates.Based on the global high coefficient paleomagnetic data and tectonic comparison in geological affiliation,the global configuration in the Late Precambrian to Early Paleozoic is reconstructed by GPlate software,the Ordovician-Silurian is the key transition period of Chinese three plates.Before 440 Ma,the configuration of Chinese three plates is N-S/T style(North China lies in the west,South China lies in the northeast,Tarim lies in the southeast).After 440 Ma,the configuration is transformed into a T-N/S style(Tarim lies in the west,North China lies in the northeast,South China lies in the southeast)that maintains.The key transition is related to the breakup of the Late Precambrian Rodinian supercontinent and the change of ocean-continent configuration of Chinese three plates in the Early Paleozoic,the transition is from extension to compression in tectonic setting.

关 键 词：塔里木板块 华北板块 华南板块 古纬度变迁 地质亲缘性 构造地质学 

分 类 号：P54[天文地球—构造地质学]