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前言关于陆壳起源和演化的主要模式有如下两类:第一类模式假定,大部分地壳形成于地史的早期,且它的总质量在整个地史时期内基本保持不变,地壳以稳定态方式经地慢发生不断的再循环。第二类模式假定,地壳在整个地史时期内是连续或准连续方式生长的。陆壳呈准连续或幕式生长的观点已得到大量同位素资科的支持。有人将地壳生长划分为五个独立阶段(33—35、28—25、19—16、12—9和5—0亿年)。在太古宙—元古
Preface There are two main types of modes of origin and evolution of the continental crust. The first type assumes that most of the crust was formed early in geo- history and its total mass remained essentially constant over the entire geo-history, with the crust stabilized Slow way through the continuous recycling. The second type of model assumes that the crust was continuously or quasi-continuously growing throughout the entire geo-history. The view that the continental crust is quasi-continuous or episodic growth has been supported by a large number of isotopes. Crustal growth has been divided into five separate stages (33-35, 28-25, 19-16, 12-9 and 5-0 billion years). In the Archaean - Proterozoic