扬子古板块构造有关问题探讨  

ON PROBLEMS CONCERNING OLD YANGTZE PLATE TECTONICS

作　　者：罗璋 

机构地区：[1]广西地质学校

出　　处：《广西地质》1995年第4期3-13,共11页Guangxi Geology

摘　　要：根据已知地质事实，用历史分析法，探讨华南晚元古代至早古生代古板块构造轮廓及其演化史。认为当时华南地区存在扬子古板块和华夏微板块。晚元古代（含早震旦世）扬子古板块在其东南部华南幼拉槽扩张推动下向北西漂移，在其前缘（北西侧）形成安第斯型主动大陆边缘；晚震旦世至早古生代，扬子古板块在秦岭海槽扩张推动下向南东漂移，在其前缘（南东侧）形成岛孤型主动大陆边缘。并通过与南海古板块的碰撞，形成华南加里东褶皱系，此过程亦可简化为华南褶皱系的开一合过程。肯城运动是反映上述古板块构造格局改变的一次重要变动。According to the known geological facts and using historic analytic method，the author discusses old plate tectonic outline of South China from Late Proterozoic to EarlyPaleozoic and its evolutional history，and considers that old Yangtze Plate and CathaysianMicroplate existed in South China at that time. Old Yangtze plate was driven by thespreading of South China downwarping trench to the southeast of Old Yangtze Plate todrift northwestwards in Late Proterozoic（Including Early Sinian）and produce activecontinental margin of Andes type in its northwestern front of the Plate， it was driven bythe spreading of Qinling trough to drift southeastwards and form active continental marginof arc type in its southeastern front from late Sinian to Early Palwozoic.The old YangtzePlate collided with South China Sea Old Plate to form South China Caledonian foldsystem. This process is briefly called open-close process of South China fold system. Kencheng Movement is an important revolution reflecting the transformation of tectonicsettings of the above mentioned old plate.

关 键 词：古板块构造 历史分析 仰冲作用 肯城运动 

分 类 号：P542.4[天文地球—构造地质学]