| 摘要: |
| 措勤盆地为青藏高原仅次于羌塘盆地的第二大海相盆地,笔者通过对盆地基底和盖层变形特征分析,将措勤盆地基底划分为北部拗陷、北部隆起、中部拗陷和南部隆起4个一级构造单元;盖层划分为北部拗褶带、北部冲断带、中部拗褶带、南部冲断带和南部拗褶带5个一级构造单元,并利用平衡剖面计算得到措勤盆地晚白垩世缩短约24%。 |
| 关键词: 措勤盆地|拗陷|盖层|地壳缩短|西藏 |
| DOI： |
| 附件 |
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| 基金项目:国土资源部"青藏高原油气资源战略选区调查与评价"项目;国家自然科学基金项目(40672086) |
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| Tectonic division and crustal shortening in the Coqen Basin,Xizang |
| ZHANG Yi, LI Ya-lin, HUANG Ji-jun |
(1. Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, Sichuan, China;
2. Centre for Qinghai-Xizang Plateau Geology, China University of Geosciences, Beijing, Beijing 100083, China) |
| Abstract: |
| The Coqen Basin,Xizang is the second large-scale marine basin only smaller than the Qiangtang Basin on the Qinghai-Xizang Plateau.Tectonically,the basement of the Coqen Basin may be divided into four first-order tectonic units,i.e.,northern depression,northern uplift,central depression and southern uplift,while the cover may be separated into five first-order tectonic units,i.e.,northern downwarped zone,northern thrust fault zone,central downwarped zone,southern thrust fault zone and southern downwarped zone.The shortening rates during the Late Cretaceous are estimated at about 24% on the basis of the balanced cross-section calculations. |
| Key words: Coqen Basin|depression|cover|crustal shortening|Xizang |
