中国东北地区主要地体古地磁学研究

东北地区由多个地体组成，其运动特征与邻区西伯利亚和华北等板块具有明显差异，有其独特的演化历史。古地磁资料支持将其划为独立构造单元，称之为东北地体群。古地磁资料表明，东北主要地体古生代处在南纬低纬度地区，中生代诸地体共同快速北移，其纬向运移的平均速度约为３．８ｃｍ／ａ。于白垩纪中期就位于现今位置。

PALAEOMAGNETIC STUDY OF THE MAIN TERRANES,NORTHEAST AREA, CHINA

The Northeast area cousists of many terranes. They joined together near by equator during permian period and form a whole block. Its palaeomagnetic properties is dissimilar to both Siberia and North China, therefore this report consider it as a independent terrane group. 2. Northeast terrane group connected with North China in the terminal stage of Triassic period, boundary-line should lie to the south of middle Jilin-Yanji. The terrane group connected with Siberia plate during upper Jurassic to lower cretaceous, boundary should lie mongolia-ehuocike belt. 3. Palaeomagnetic data from the northeast terrane group is similar to that from other terranes of China continent, they all show a southern movement during upper Jurassic to Lower Cretaceous.