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Late Quaternary strike-slip along the Taohuala Shan-Ayouqi fault zone andits tectonic implications in the Hexi Corridor and the southern Gobi Alashan,China
Yu,JX(Yu,Jingxing)1,2; Zheng,WJ(Zheng,Wenjun)3; Zhang,PZ(Zhang,Peizhen)1,3; Lei,QY(Lei,Qiyun)4; Wang,XL(Wang,Xulong)5; Wang,WT(Wang,Weitao)1; Li,XN(Li,Xinnan)1; Zhang,N(Zhang,Ning)6; Zheng,Wenjun
2017-11-28
发表期刊Tectonophysics
卷号721期号:2017页码:28-44
文章类型期刊论文
摘要The Hexi Corridor and the southern Gobi Alashan are composed of discontinuous a set of active faults with various strikes and slip motions that are located to the north of the northern Tibetan Plateau. Despite growing understanding of the geometry and kinematics of these active faults, the late Quaternary deformation pattern in the Hexi Corridor and the southern Gobi Alashan remains controversial. The active E-W trending Taohuala Shan-Ayouqi fault zone is located in the southern Gobi Alashan. Study of the geometry and nature of slip along this fault zone holds crucial value for better understanding the regional deformation pattern. Field investigations combined with high-resolution imagery show that the Taohuala Shan fault and the E-W trending faults within the Ayouqi fault zone (F2 and F5) are left-lateral strike-slip faults, whereas the NW or WNW-trending faults within the Ayouqi fault zone (F1 and F3) are reverse faults. We collected Optically Stimulated Luminescence (OSL) and cosmogenic exposure age dating samples from offset alluvial fan surfaces, and estimated a vertical slip rate of 0.1–0.3 mm/yr, and a strike-slip rate of 0.14–0.93 mm/yr for the Taohuala Shan fault. Strata revealed in a trench excavated across the major fault (F5) in the Ayouqi fault zone and OSL dating results indicate that the most recent earthquake occurred between ca. 11.05 ± 0.52 ka and ca. 4.06 ± 0.29 ka. The geometry and kinematics of the Taohuala Shan-Ayouqi fault zone enable us to build a deformation pattern for the entire Hexi Corridor and the southern Gobi Alashan, which suggest that this region experiences northeastward oblique extrusion of the northern Tibetan Plateau. These left-lateral strike-slip faults in the region are driven by oblique compression but not associated with the northeastward extension of the Altyn Tagh fault.
关键词Fault Geometry Active Tectonics Hexi Corridor Gobi Alashan Northeastern Tibetan Plateau
DOI10.1016/j.tecto.2017.09.014
收录类别SCI
所属项目编号41372220 ; 41590861 ; 41661134011 ; 201408023 ; XDB03020201
语种英语
项目资助者National Science Foundation ofChina ; National Science Foundation ofChina ; Public Service Funds forEarthquake Studies ; Public Service Funds forEarthquake Studies ; Strategic Priority ResearchProgram of the Chinese Academy of Sciences ; Strategic Priority ResearchProgram of the Chinese Academy of Sciences
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文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5604
专题现代环境研究室
通讯作者Zheng,Wenjun
作者单位1.State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, China
2.COMET, Department of Earth Sciences, University of Oxford, Oxford OX1 3AN, UK
3.School of Earth Science and Geological Engineering, Sun Yat-Sen University, Guangzhou 510275, China
4.Earthquake Administration of Ningxia Hui Autonomous Region, Yinchuan 750001, China
5.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China
6.Earthquake Administration of Hainan Province, Haikou 570100, China
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Yu,JX,Zheng,WJ,Zhang,PZ,et al. Late Quaternary strike-slip along the Taohuala Shan-Ayouqi fault zone andits tectonic implications in the Hexi Corridor and the southern Gobi Alashan,China[J]. Tectonophysics,2017,721(2017):28-44.
APA Yu,JX.,Zheng,WJ.,Zhang,PZ.,Lei,QY.,Wang,XL.,...&Zheng,Wenjun.(2017).Late Quaternary strike-slip along the Taohuala Shan-Ayouqi fault zone andits tectonic implications in the Hexi Corridor and the southern Gobi Alashan,China.Tectonophysics,721(2017),28-44.
MLA Yu,JX,et al."Late Quaternary strike-slip along the Taohuala Shan-Ayouqi fault zone andits tectonic implications in the Hexi Corridor and the southern Gobi Alashan,China".Tectonophysics 721.2017(2017):28-44.
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