论碰撞造山带的分类

ON THE CLASSIFICATION OF COLLISION OROGENIC BELTS

近年来碰撞造山带研究取得了很大进展，为碰撞造山带分类奠定了基础。１９９２年，Ｓｅｎｇｏｒ提出了一个三分法的分类。但是，这个分类不能涵盖所有的碰撞造山带，同时其内部还有重叠。本文主要依据参与碰撞的单元，即板块、微板块、前缘弧、残留弧和增生弧，提出一个新的分类方案，即将碰撞造山带分为陆－陆，陆－前缘弧，陆－残留弧，陆－增生弧，弧－弧，陆－弧－陆６种类型。从世界各地的碰撞造山带来看，陆－陆碰撞型是很少见的，也就是说，威尔逊旋回不论在现代还是古代地质历史上都是罕有发生的，而大多数碰撞造山带都是非威尔逊旋回型的。

In the recent years,the study on collision orogenic belts has greatly advanc ed.The foundation of classification of collision orogenic belts is founded. Sengor(1992)proposed a triple classification, but it can not cover all collis ion orogenic belts.In this paper a new classification on basis of units that take part in the collision is put forward. The units include plate,microplate,f ro ntarc,remnant arc and accretion arc. The collision orogens can be classified int o continent-continent, continent-frontarc, continent-remnant arc, continent- accretion arc, arc-arc and continent-arc-continent types.In the light of collision orogenic belts in the world,the continent-continent t y pe is veryrare. The refore,the Wilson cycle is seldom seen at present and in geo logical history and most collision orogens are non-Wilson cycle type.The classification is not unique one,the other classification could be founded based on the intriorstructures or collision processes,if the geological data is plenty. However, these imformations are not enough for the classification,so the classification developed in this paper is very useful one at present.