摘要
恢复了大青山地区侏罗纪盆地的原形，并对盆地的迁移、演化规律和阶段进行了详细研究，提出石拐─老道沟侏罗纪盆地是早侏罗世晚期在古生代地层岩片与北部变质岩岩片之间发育起来的东西向延展的带状盆地。古地形表现为北高南低、西高东低；中侏罗世盆地范围达最大，中侏罗世末期的一次燕山构造运动，仗盆地的性质发生了明显的改变，由早、中侏罗世的弱拉伸构造环境转变为晚侏罗世的挤压构造环境，古气候由温暖潮湿气候转变为干旱气候；晚侏罗世末期，随着大规模的逆冲推覆构造的发育而结束盆地的演化历史。
The authors have reconstructed the original shape of Jurassic basin in Daqing-shan region and discussed the moving and evolution pattern of the basin. The basin developed between Paleozic strata sliver and metamorphic rock sliver in late stage of early Jurassic and ex-tended in latitude direction. The paleo - terrene of the basin is higher in north and west than in south and east. The boundary of basin is largest in Changhangou stage of middle Jurassic. After middle Jurassic, the region took place Yanshan movement, and then the basin characteristic were changed obviously from weakly extending environment of early and middle Jurassic to ex-truding environment of late Jurassic, and the paleo - climate of the basin changed from warmth and wetness to dry. The basin finished the evolution history in the late stage of late Jurassic with the development of thrust.
出处
《世界地质》
CAS
CSCD
2001年第3期231-236,共6页
World Geology
基金
国土资源部地调局内蒙古大青山地区6幅1:5万区域地质调查项目资助(0199209031)
