| 库车坳陷克依构造带坎亚肯背斜变形序列及其ESR年代 |
| |
| 关键词:Kuqa depression Kelasu-Yiqikelike Structural Belt minor structure deformation sequence Palcostress reconstruction ESR dating |
| 基金项目:国家重点基础研究发展规划973项目(编号:G1999043303) |
|
| 摘要点击次数: 4908 |
| 全文下载次数: 5369 |
| 摘要: |
| Progressive Structural Deformation and ESR Dating Ages of Kanyaken Anticline in Kelasu-Yiqikelike Structural Belt of the Kuqa Depression |
| Medium and minor structures in field record a progressive deformation sequence of an entire fold-and-thrust belt. Observations of these structures and their overprinting relationships in Kanyaken fold of the Kuqa fold and thrust belt unravel three stages of compressive deformation in Cenozoic, i.e., layer-parallel shortening, flexural-slip and flexural-flow folding, and thrusting modification. Meanwhile, the inversion of the fault-slip data from different stages and the paleostress reconstruction show that the maximal orientation of σ_1, i.e., the structural shortening direction, is NNW-SSE during all the compressive deformations. ESR dating of the faults shows that the faulting had taken place before the end of Pliocene. It is thus concluded that the deformations of three stages were produced in the same stable stress field progressively, and that they are progressive sequential deformations rather than poly-phase compressive deformations. The compressive deformation that took place mainly in 12～5 Ma did play a crucial role in the final formation of the structural traps in the Kelasu-Yiqike like structural belt. |
| ZHANG Zhong-pei,WANG Qing-chen,WANG Yi.2007.Progressive Structural Deformation and ESR Dating Ages of Kanyaken Anticline in Kelasu-Yiqikelike Structural Belt of the Kuqa Depression[J].Acta Geoscientica Sinica,28(1):23-31. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
|
|