扬子地块古生代大地构造演化及古地磁学研究综述

A REVIIEW OF THE TECTONIC EVOLUTION AND PALEOMAGNETIC RESEARCH FOR THE YANGTZE BLOCK DURING PALEOZOIC

本文简要地论述了扬子地块古生代大地构造研究现状，扬子与华夏地块之间的华南裂谷盆地于奥陶纪初（郁南运动）发生收缩，直到加里东末期基本封闭。古生代扬子地块与华北地块之间的秦岭海槽以拉张为主，扬子地块西缘古生代期间处于相对稳定的构造环境，古生代末进入特提斯构造域，发生活化。目前扬子地块早古生代古地磁学研究程度相对较低，其难点是岩石普遍遭受了重磁化的影响。

In this paper,a brief review about the Paleozoic tectonic evolution for Yangtze block has been present. The Huanan rift basin, had been undergone a contract at Ordovician,and die out untill the late Caledonian Cycle. Qinling lies between Huabei and Yangtze blocks.The tectonic evolution of Qingling trench between Huabei and Yangtze blocks shows opening characteristic in the early paleozoic. The western edge of Yangtze block was in the relative stable tectonic environment. Despite numerous investigations spanning more than a decade,the paleomagnetic data base for the Paleozoic af South China remains sparse and the subject controversial. A major cause for the slow progress is that the Paleozoic rocks had been subject pervasive remagnetization.