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引言因为现代大陆壳的大部分(可能大于50％)看来是在太古宙(>25亿年)期间形成的,所以试图认识导致太古宙地壳发展的岩浆和构造作用是重要的。但还存在许多问题。为什么在大约38亿年以前没有形成地壳?或是它再循环回到地幔系统,以致没有残留物吗?太古宙高级片麻岩、麻粒岩区和低级花岗岩一绿岩区之间的主要差别是什么?它们是否代表太古宙不同的构造环境?这种环境是太古宙独有的,或已发现了现代的相
Introduction It is important to try to understand the magmas and tectonics that led to the development of the Archean crust as most (perhaps more than 50%) of the modern continental crust appears to have formed during the Archean (> 2.5 billion years) period. But there are still many problems. Why did not the crust be formed about 3.8 billion years ago or was it recycled back to the mantle system so that there was no residue? The main differences between Archean high gneiss, granulite and low-grade granite-greenstone What are they, and do they represent different Archean tectonic settings that are unique to Archean or have found modern phases