摘要
羌塘盆地位于班公湖 -怒江缝合带和西金乌兰 -金沙江缝合带之间 ,是一沉积盆地 ,分为羌南坳陷、中央隆起、羌北坳陷。盆地形成演化受特提斯构造带地球动力学控制。对盆地地层格架和区内碎屑岩的主要矿物成分、化学成分、微量元素以及火成岩化学成分的分析表明 ,羌塘盆地系不同类型盆地叠置而成的多旋回叠合盆地。晚古生代至中生代初为克拉通裂谷盆地、晚三叠世—侏罗纪为前陆盆地、白垩纪—第四纪为挤压抬升阶段 ,形成山间断陷盆地。
The Qiangtang Basin is a huge sedimentary basin which is situated between the Banggonghu Lake Nujiang River suture zone and the Xijinwulan Jinshajiang River suture zone.Its formation and evolution was controlled by the dynamics of the Tethys tectonic belt.An analysis of the sedimentary sequence and of the essential mineral components,chemical components and trace elements of the clastic rocks as well as the chemical components of igneous rocks in the Qiangtang Basin show that the basin resulted from a superimposition of different types of tectonic basins in different periods i.e.a craton riftbasin in the Late Paleozoic,a foreland basin in the Mesozoic and an intermountain graben basin in the Cenozoic.
出处
《地质力学学报》
CSCD
2000年第4期58-66,共9页
Journal of Geomechanics
基金
国家重点基础研究发展计划项目! (G19980 40 80 1- 5 )
关键词
羌塘盆地
前陆盆地
特提斯构造带
构造演化
Qiangtang Basin
foreland basin
Tethys tectonic belts
sedimentary sequence
