RELATIVE BLOCKS AND CONVERGENCE PROCESS DURING THE CALEDONIAN MOVEMENT IN SOUTH CHINA
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摘要: 从华南加里东期相关地块的特征及其来源分析出发,探讨了华南加里东运动。加里东期,华南的湘桂、赣南、云开、浙闽、保山、腾冲等地块及扬子陆块均与罗迪尼亚超级大陆的裂解有关,这些裂解地块在早古生代形成冈瓦纳大陆的背景下发生聚合和碰撞拼贴,产生多期不同性质的加里东构造运动,而且此次地块碰撞拼贴具有软碰撞性质,主要表现为在地块碰撞的前锋带形成大陆边缘隆起和发育碰撞花岗岩,并在碰撞地块的前后缘有残留海盆存在。Abstract: This paper discussed the plate tectonic movement during the Caledonian in South China by analyzing the feature and origin of relative blocks in Caledonian Movement.During the Caledonian,Xianggui,Gannan Yunkai,Zhemin,Baoshan,Tengchong and Yangzi blocks had all relationship of the cracking of the Rodinia continent.These blocks converge and collide under the background of forming the Gondwana continent in Eopaleozoic.And then multiperioyic Caledonian Movement with different character was formed.The collision matching has the character of soft collision and weak orogenic which appear as the continent margin uplift and collision granite formed in the front of collided landmasses,also in the back and front of collided landmasses the relict seabasin was found.After the Caledonian Movement,the basic tectonic structure of South China had been set up.
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Key words:
- Caledonian Movement /
- relative blocks /
- cracking of Rodinia continent /
- converge of blocks /
- South China
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