晚古生代以来古亚洲洋构造域主要块体运动学特征初探  

Preliminary Study on Post-Late Paleozoic Kinematics of the Main Blocks of the Paleo-Asian Ocean

作　　者：任收麦[1] 黄宝春[2] 

机构地区：[1]吉林大学地球科学学院,长春130061 [2]中国科学院地质与地球物理研究所,北京100101

出　　处：《地球物理学进展》2002年第1期113-120,共8页Progress in Geophysics

基　　金：中国科学院知识创新工程项目 (KZCX2~ 10 4)

摘　　要：基于近年来的古亚洲洋两侧地质和古地磁资料 ,总结华北块体和西伯利亚板块拼合焊接的时间和位置 ,对兴蒙造山带晚古生代以来大地构造演化历史进行简要阐述 ,探讨了华北块体与西伯利亚板块的运动学特征 .早侏罗世 ,西伯利亚板块北向漂移达到高潮 ,转为南向漂移 .受其影响 ,早侏罗世期间华北块体也表现为相应的南向位移 ,但由于块体间造山带的应力消减 ,使得南向位移量产生差异 .早侏罗世以后 ,由于库拉板块的斜向俯冲 ,使得华北块体转为北向漂移 ,并产生 10°左右的逆时针旋转和形成中国东北巨大的弧形构造体系 .On the basis of the geological and paleomagnetical results from some blocks of the Paleo-Asian Ocean, we preliminary summarized the location and time of the suturing between the North China block and Siberia and expatiated the tectonic evolution history of Hinggan-Mongolian orogen since the late Paleozoic. However, these two blocks showed a different amount of southward movement, which may be caused by the stress eliminating of the orogen. Kinematics sketch between North China block and Siberia were also discussed. During the early Jurassic, northward drift of Siberia reached a climax and then turned to southward movement. As a result, the North China block may show significant southward movement during that time. Since the early Jurassic, the subduction of Kula plate may cause the North China block turn to northward movement with counterclockwise rotation of 10°. We inferred that it is this northward movement and counterclockwise rotation caused the formation of the arc-structure fold belt in Northeast China.

关 键 词：晚古生代 古亚洲洋 运动学 古地磁资料 华北块体 西伯利亚板块 

分 类 号：P541[天文地球—构造地质学]