Characteristics and Formation Mechanism of Composite Flower Structures in Northern Slope of Tazhong Uplift, Tarim Basin

被引：6
|
作者：
Han X. [1 ,2 ]
Tang L. [1 ,2 ]
Cao Z. [3 ]
Wei H. [3 ]
Fu C. [1 ,2 ]
机构：
[1] State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing
[2] College of Geosciences, China University of Petroleum, Beijing
[3] Exploration and Production Research Institute of Northwest Oilfield Branch Company, SINOPEC, Urumqi
来源：
Tang, Liangjie (1140071859@qq.com) | 2018年 / China University of Geosciences卷 / 43期
关键词：
Composite flower structure; En-echelon normal fault; Linear structure; Northern slope of Tazhong uplift; Petroleum geology; Strike-slip fault;
D O I：
10.3799/dqkx.2017.600
中图分类号：
学科分类号：
摘要：
Developmental stages and mechanisms of the strike-slip faults on the northern slope of the Tarim basin remains controversial despite many studies. However, a more detailed study of the strike-slip faults in the area is possible due to the availability of high-quality 3D seismic data now. It is found that a series of strike-slip faults, which cut through the basement strata and straight up to the Middle Devonian strata, developed in the study area based on detailed 3D seismic interpretations. On the 3D seismic profiles, the strike-slip fault shows complex geometric feature that consists of a lower positive flower structure and an upper negative flower structure that is bounded by the Late Ordovician strata. On the seismic coherency slices, the lower strike-slip faults show NE linear extension and the upper strike-slip faults are NW trending and present right-order en-echelon arrangements. According to changes of the rising height of the interface and fault throw changes, the development history of the strike-slip faults may be divided into two stages including the Late Ordovician and the Middle Silurian-Middle Devonian. Combined with tectonic background analyses on the structures surrounding Tarim basin, the lower strike-slip faults and the upper en-echelon normal faults may be genetically linked. In the Late Ordovician, the Tazhong uplift experienced a strong compression from ancient Kunlun ocean subducting in NE direction, which resulted in the formation of NNE-trending strike-slip faults. During the Middle Silurian-Middle Devonian, intense folding orogeny of the Arkin tectonic domain caused the reactivation of the lower strike-slip faults and made the formation of the en-echelon normal faults was controlled by the early-stage basement weak zones. © 2018, Editorial Department of Earth Science. All right reserved.
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页码：525 / 537
页数：12
相关论文
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