滇川西部金沙江古特提斯洋的威尔逊旋回

The Wilson Cycle of the Jinshajiang Paleo-Tethys Ocean, in Western Yunnan and Western Sichuan Provinces

本文对滇川西部金沙江造山带被动大陆边缘、蛇绿岩、洋盆相放射虫硅质岩、岛弧岩浆岩和造山磨拉石建造的形成时代进行了综合研究 ,结合古生物化石和 SHRIMP年龄 ,论证了金沙江古特提斯洋盆的威尔逊旋回 ,即大陆裂解 (晚泥盆世 )、洋盆扩张 (石炭纪 )、俯冲消减 (二叠纪 )和碰撞造山 (三叠纪 )。金沙江洋是滇川西部古特提斯多岛洋中重要的支洋盆。

The paper makes the comprehensive study of the age of the passive continental margin, ophiolites, radiolaria silicalite of ocean basin facies, island arc magmatite and molasses formation of the Jinshajiang Orogenic Belt in Western Yunnan and Western Sichuan Provinces. In the light fossils and SHRIMP dating, it proves the Wilson cycle of the Jinshajiang Paleo-Tethys Ocean, namely, continental cracking (D 3),oceanic spreading(C),oceanic subduction(P) and collision orogency(T).Jinshajiang ocean is the important branch of ocean basin of multiisland ocean of Paleo-Tethys.