中国前震旦纪地壳构造运动旋回的划分

本文对我国三大断块(区)的前寒武纪地层的发育、建造类型、不整合及部分同位素年龄值进行了对比,划分出五个地壳构造运动旋回,即桑干旋回(2500—2600百万年前),五台旋回(2000百万年前),中岳旋回(1700百万年前),“阴山旋回”(约1200—1300百万年前)和晋宁旋回(1050—900百万年前)。指出在前震旦纪变质岩系中的不整合具有多次地壳构造运动的集合的性质,相当显生宙的一个构造旋回。同时指出晋宁运动具有明显的穿时性,与板块构造理论相符

CLASSIFICATION OF THE PRE-SINIAN OROGENY CYCLES IN CHINA

There are three major fault blocks in China, i. e. the North China block province (consisting of six subblocks), the Yangtze block and the Tarim block. Their origin, development and consolidation are controlled by the pre-Sinian orogenies. One fault block may have been resulted from a single orogenic cycle or in most cases a few orogenic cycles because of the pre-Sinian orogeny was characterized by multiple cycles. Since the idea that an orogeny is occurred simultaneously all over the world was