【摘要】 为了配合长江源变质岩区找矿和查明龙木错—双湖—澜沧江结合带变质特征,揭开结合带延伸之谜,近年笔者等在开展1∶25万赤布张错幅区域地质调查时,对区内变质岩进行了系统调查和总结,西南部亚恰一带首次发现一套变质岩,为研究唐古拉山地区乃至北羌塘坳陷东南部盆地基底特征和双湖—澜沧江变质带提供了重要的基础地质资料。更多还原

【Abstract】 Geladandong area in origin area of the Yangtze River is located in the west of Tanggulashan,and the metamorphic rocks are lack of research.During 1∶250000 regional geological survey of Chibuzhangcuo,we surveyed metamorphic rocks belt.And we arguer that it provides stratigraphic evidence for the determination of the closing age of Shuanghu-Lanchang River and tectonic contact relationship with the overlying upper strata,and enriches the content of metamorphic rocks in Tanggulashan area.The paper summarzie the characteristics of metamorphic rocks in the area.This discovery has great significance for the understanding the ocean-land transformation of the Paleo-Tethys.更多还原