地体构造对研究地台和地盾区域成矿规律的重要性

３０年前板块构造理论的建立引起所有相关的地球科学的革命，其中包括区域成矿学。然而随着地球科学理论的发展，板块构造理论对于解释地壳，特别是早前寒武的地盾、地台和克拉通区的复杂构造现象显得不完备，因此，近２０年来地体构造理论的发展补充了板块构造理论的不足。近年来，各国地质学家相继发现世界上各地盾、地台和克拉通区，如华北地台、乌克兰地盾、阿尔丹地盾、加拿大地盾、非洲地台、澳大利亚耶尔冈克拉通等是由多个地体所组成。每一个地体是一个独立的和基本的地质构造单元，彼此间由地缝合线或深断裂隔开。由于每个地体的地质特征、构造环境和成矿作用各不相同，因而地体构造成为区域成矿学的一个重要组成部分。

SIGNIFICANCE OF TERRANE TECTONICS TO METALLO-GENY ON SHIELDS,PLATFORMS AND CRATONS

The revolutional consequence of the formulation of plate tectonics three decadesago is familier to all who are concerned with the earth sciences,including metallogeny. However,earth sciences have been proceeding,the plate tectonics becomes insufficient tointerpret the complicated tectonic features in the earth crust,especially in the Early Pre-cambrian shields, platforms and cratons.Consequently,the theory of terrane tectonicsarose as a supplement to the plate tectonics in the last two decades.In recent years,geolo-gists discovered that all shields,platforms and cratons,such as the North China Platform, Ukrainian shield,Canadian shield,African platform and Yilgarn craton,etc.,are com-posed of several terranes.Each terrane is an independant and foundamental tectonic unitseparated from each other by sutures and deep faults.Owing to the differences among ter-ranes in geological characteristics,history,structure and tectonic setting,we consider theterrane tectonics as an important part of regional metallogeny.