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一、导言关于地球大陆壳演变的争论一直集中于两个问题上。问题之一就是硅铝带演变的速率,而其主要理论可归为三大类:1)早太古代地球内几乎所有的硅铝物质都发生了分凝作用,并产生了完全由年轻的地质事件改造的许多大陆块;2)在太古代过程中各大
I. INTRODUCTION The debate over the evolution of the Earth’s continental crust has been centered on two issues. One of the problems is the rate of evolution of silicon-aluminum ribbons, and its main theories fall into three categories: 1) Almost all of the Al-Si material in the early Archean earth decondensated and resulted in a completely geologically- Many continental blocks transformed by events; 2) Major in the Archean process