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满洲里地区,系指中、蒙、苏三国衔接地带而言。笔者近年在查于陶勒盖、大青山,阿拉陶布其、沃尔滚花和额尔登乌等地发现了元古代地层。该区的元古代地层,由于受强烈的构造-岩浆活动、变质作用和混合岩化作用的影响,不仅岩石面貌发生了极其深刻变化,而且其产出亦肢离破碎。使地层层序的研究、厚度测量以及原岩的恢复,都难于进行。据初步观测,该地层主要由一套绿片岩(石英角闪片岩、斜长角闪片岩、云母石英片岩、二云母片岩、
Manchuria, refers to the convergence zone of China, Mongolia and the Soviet Union. In recent years, I found the Proterozoic strata in the Tolgoi, Daqingshan, Alataubu, Waldock and Erdengwu. Because of the strong tectonic-magmatic activities, metamorphism and mixed rock formation, the Proterozoic strata in this area not only undergo profound changes in the rock face, but also produce crushed limbs. Research on stratigraphic sequence, thickness measurement and restoration of original rock are difficult to carry out. According to preliminary observations, the strata mainly consist of a series of greenschist (quartz hornblende, plagioclase, mica quartzite, mica schist,