摘要
根据新编制的１∶２００ 万重磁资料分析，中国北部深层存在东、中、西３ 个构造区，其东界在贺兰山—六盘山—龙门山一线，西界在星星峡—若羌一线。由此可见，东部范围包括华北—东部地区；中部包括蒙甘青地区；西部为塔里木—准噶尔地区。东、西部由中国最古老的２ 个太古代—早元古代稳定地块组成，而中部是元古代地块区，因受青藏高原的推挤，活动性较大。同时认为，原定的界线———大兴安岭—太行山—武陵山断裂仅发生在东部构造区内。
According to the analysis of newly compiled 1∶2 000 000 gravity and magnetic data,there exist three (eastern,central and western) deep tectonic areas in northern China,which are bounded in the east by Helan Mountain Liupan Mountain Longmen Mountain line and in the west by Xingxingxia Ruoqiang line.It can thus be seen that the eastern area covers North China Northeast China area,the central area comprises Inner Mongolia Gansu Qinghai area,and the western area is Tarim Junggar area.The eastern and western parts consist of two oldest Archean Early Proterozoic stable land masses of China,whereas the central part is the Proterozoic land mass,which is rather active due to the compressive action of Qinghai Tibet plateau.It is also held that the original boundary,namely Da Hinggan Mountains Taihang Mountains Wuling Mountain fault,exists merely in the eastern tectonic area and does not form the boundary separating various areas.
出处
《物探与化探》
CAS
CSCD
2000年第1期17-22,共6页
Geophysical and Geochemical Exploration
关键词
重磁场特征
地壳厚度
构造区块
断裂
深层构造
northern China
gravity and magnetic characteristics
crustal thickness
tectonic block
deep fault
