Rodinia裂解与华南微板块形成和演化

介绍了Rodinia研究的历史、现状及主要进展,分析了华南相关地块在Rodinia中的位置以及从Rodinia到Pangea的演化历程.分析结果表明,扬子陆块从Rodinia裂离后,其间在Gondwana形成时,可能发生过湘桂地体、云开地体、浙闽地体、保山地体和腾冲地体的碰撞拼贴造山作用过程.在古特提斯演化阶段,这些地体随古特提斯洋的开启而与扬子陆块裂离,并逐渐形成多岛洋的构造格局,之后又随Pangea的形成而再次与扬子陆块碰撞拼贴增生.因此,Rodinia,Gondwana,Pangea等的形成、裂解和裂离后地体的拼贴增生是认识华南大地构造格局和演化的关键之一.Rodinia应该是华南大地构造研究值得重视的重要课题.

Review on Rodinia and Tectonics in South China

Rodinia is now one of hot points in international earth science research in pre-Cambrian Period.Main advances in research on Rodinia are introduced in this paper.The location of the masses related to South China in Rodinia and their evolution history from Rodinia to Pangea are analyzed.The results show that the matching and orogensis of Xianggui terrane,Yunkai terrane,Baoshan terrane and Tengchong terrane had taken place during the formation of Gondwana after the Yangtze continent was splitted from Rodinia.These terranes were again divided to form the Yangtze continental margin to form the tectonic pattern of archipelagic ocean in the evolution of Paleo-Tethys,then again matched and accreted with the Yangtze continent during the formation of Pangea.The formation and splitting of Rodinia,Gondwana and Pangea is one of the keys to understand the tectonics and evolution in South China.The research on Rodinia should be one of the important questions for the study of tectonics in South China.