Young, active conjugate strike–slip deformation inWest Sichuan: evidence for the stress–strain pattern ofthe southeastern Tibetan Plateau
Su,Z(Su,Zhe)[1,2,3]; Wang,E(Wang,Erchie)[1,2]; Furlong,KP(Furlong,Kevin P.)[3]; Shi,XH(Shi,Xuhua)[4]; Wang,G(Wang,Gang)[5]; Fan,C(Fan,Chun)[6]
2012-07
发表期刊International Geology Review
卷号54期号:9页码:991-1012
文章类型期刊论文
摘要The active kinematics of the eastern Tibetan Plateau are characterized by the southeastward movement of a major tectonic unit, the Chuan-Dian crustal fragment, bounded by the left-lateral Xianshuihe–Xiaojiang fault in the northeast and the right-lateral Red River–Ailao Shan shear zone in the southwest. Our field structural and geomorphic observations define two sets of young, active strike–slip faults within the northern part of the fragment that lie within the SE Tibetan Plateau. One set trends NE–SW with right-lateral displacement and includes the Jiulong, Batang, and Derong faults. The second set trends NW–SE with left-lateral displacement and includes the Xianshuihe, Litang, Xiangcheng, Zhongdian, and Xuebo faults. Strike–slip displacements along these faults were established by the deflection and offset of streams and various lithologic units; these offsets yield an average magnitude of right- and left-lateral displacements of ∼15–35 km. Using 5.7–3.5 Ma as the time of onset of the late-stage evolution of the Xianshuihe fault and the regional stream incision within this part of the plateau as a proxy for the initiation age of conjugate strike–slip faulting, we have determined an average slip rate of ∼2.6–9.4 mm/year. These two sets of strike–slip faults intersect at an obtuse angle that ranges from 100◦ to 140◦ facing east and west; the fault sets define a conjugate strike–slip pattern that expresses internal E–W shortening in the northern part of the Chuan-Dian crustal fragment. These conjugate faults are interpreted to have experienced clockwise and counterclockwise rotations of up to 20◦. The presence of this conjugate fault system demonstrates that this part of the Tibetan Plateau is undergoing not only southward movement, but also E–W shortening and N–S lengthening due to convergence between the Sichuan Basin and the eastern Himalayan syntaxis.
关键词Tibetan Plateau Chuan-Dian crustal fragment conjugate strike–slip fault system Wenchuan and Yushuearthquakes
DOI10.1080/00206814.2011.583491
收录类别SCI
语种英语
引用统计
被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/10928
专题黄土与第四纪地质国家重点实验室(2010~)
通讯作者Su,Z(Su,Zhe)[1,2,3]
作者单位1.State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics,Chinese Academy of Sciences, Beijing, 100029, PR China;
2.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment,Chinese Academy of Sciences, Xi'an, 710075, PR China;
3.Department of Geosciences, Graduate University of the Chinese Academy of Sciences,Beijing, 100049, PR China;
4.Department of Geosciences, Pennsylvania State University, University Park, PA, 16802, USA;
5.State Key Laboratory for Geohazard Prevention and Geoenvironment Protection, ChengduUniversity of Technology, Chengdu, 610059, PR China;
6.Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Accumulation Mechanism ofthe Ministry of Education, China University of Geosciences, Beijing, 100083, PR China
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GB/T 7714
Su,Z(Su,Zhe)[1,2,3],Wang,E(Wang,Erchie)[1,2],Furlong,KP(Furlong,Kevin P.)[3],等. Young, active conjugate strike–slip deformation inWest Sichuan: evidence for the stress–strain pattern ofthe southeastern Tibetan Plateau[J]. International Geology Review,2012,54(9):991-1012.
APA Su,Z,Wang,E,Furlong,KP,Shi,XH,Wang,G,&Fan,C.(2012).Young, active conjugate strike–slip deformation inWest Sichuan: evidence for the stress–strain pattern ofthe southeastern Tibetan Plateau.International Geology Review,54(9),991-1012.
MLA Su,Z,et al."Young, active conjugate strike–slip deformation inWest Sichuan: evidence for the stress–strain pattern ofthe southeastern Tibetan Plateau".International Geology Review 54.9(2012):991-1012.
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