IEECAS OpenIR  > 黄土与第四纪地质国家重点实验室(2010~)
Young, active conjugate strike-slip deformation in West Sichuan: evidence for the stress-strain pattern of the southeastern Tibetan Plateau
Su, Z (Su, Zhe)[1,2,3]; Wang, E (Wang, Erchie)[1,2]; Furlong, KP (Furlong, Kevin P.)[4]; Shi, XH (Shi, Xuhua)[4]; Wang, G (Wang, Gang)[5]; Fan, C (Fan, Chun)[6]
2012-06-30
Source PublicationINTERNATIONAL GEOLOGY REVIEW
Volume54Issue:9Pages:991-1012
Subtype期刊论文
Abstract

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 similar to 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 similar to 2.6-9.4 mm/year. These two sets of strike-slip faults intersect at an obtuse angle that ranges from 100 degrees to 140 degrees 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 degrees. 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.

KeywordTibetan Plateau Chuan-dian Crustal Fragment Conjugate Strike–slip Fault System Wenchuan And Yushuearthquakes
DOI10.1080/00206814.2011.583491
Indexed BySCIE
Language英语
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10159
Collection黄土与第四纪地质国家重点实验室(2010~)
Corresponding AuthorSu, Z (Su, Zhe)[1,2,3]
Affiliation1.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 KeyLaboratory for Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059,PR China;
6.Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Accumulation Mechanism of the Ministry of Education,China University of Geosciences, Beijing 100083, PR China
Recommended Citation
GB/T 7714
Su, Z ,Wang, E ,Furlong, KP ,et al. Young, active conjugate strike-slip deformation in West Sichuan: evidence for the stress-strain pattern of the 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 in West Sichuan: evidence for the stress-strain pattern of the southeastern Tibetan Plateau.INTERNATIONAL GEOLOGY REVIEW,54(9),991-1012.
MLA Su, Z ,et al."Young, active conjugate strike-slip deformation in West Sichuan: evidence for the stress-strain pattern of the southeastern Tibetan Plateau".INTERNATIONAL GEOLOGY REVIEW 54.9(2012):991-1012.
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