右江三叠系复理石与印支再生地槽

TRIASSIC FLYSCH AND INDOSINIAN REJUVENATED GEOSYNCLINE IN YOUJIANG

摘要: 右江三叠系厚9000m,具良好的鲍马序列和象形印模,属典型的复理石建造。右江印支再生地槽是在华南后加里东准地台的基础上形成的,是地台转化为地槽的一个很好实例。

Abstract: The Triassic System in the Youjaing rejuvenated geosyncline,more than 9,000 m thick,is characterized by the good Bouna Sequence and pictographic casts,belonging to a typical flysch formation.The Youjiang Indosinian reju- venated geosyncline was formed on the basis of the post-Caledonian South China paraplatform.It had experienced an entire process of the development of a geosyncline:the extension of the continental crust produced a down-faulted trough—the widening and deepening of the trough gave rise to a deep water basin—the occurrence of turbidity currents generated flysch—the fold uplift ended the development of a geosyncline,So it is an excellent example for the transformation of a platform into a geosyncline.