A Model of Contractional Structure for Transition Belt between Kuche Depression and Southern Tianshan Uplift
详细信息
- 责任者：Qi Jiafu (State Key Laboratory of Petroleum Resource and Prospecting ; China University of Petroleum ; Beijing 102249 ; China) ; Lei Ganglin
- 刊名：Earth Science Frontiers
- 出版年：2009
- 卷期：16(3)
- 关键词：构造样式 ; tectonic style ; 盆岭构造 ; basin range structure ; 天山 ; Tianshan Mountains ; 库车坳陷 ; Kuqa Depression
- 页码：p.120-128
- 图表：5 illus., 29 refs.
- 分类号：0300
- issnNo：ISSN1005-2321
- isbnNo：CN11-3370/P
摘要
///The structural features of the Cenozoic contractional deformation in the transition belt between Kuche depression and southern Tianshan uplift have been revealed by geological outcrop, seismic data, well-log and CEMP (Continuous Electromagnetic Profile) data, it is found that these features are difficult to be interpreted by the typical “A-type” subduction model. Most of fault systems in the lower level probably vanished toward the salt rock of Paleocene-Eocene or coal-bearing series of Jurassic,the high-angle basement-involved thrust tipped upward to the core of detachment anticline in the shallower level, so that the salt rock or coal-bearing series was an important transfer level. The high-angle basement-involved thrust may have been formed by the reverse displacement of a pre-existing normal fault and led to the local structural deformations. The occurrence of the high-angle thrust or the reverse of the pre-existing normal fault may be attributed to the dynamics of vertical shearing caused by the uplift of southern Tianshan.
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