气候变化领域集成服务门户(CCPortal): Active crustal deformation in the Tian Shan region, central Asia

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DOI	10.1016/j.tecto.2021.228868
	Active crustal deformation in the Tian Shan region, central Asia
	Li Y.; Liu M.; Hao M.; Zhu L.; Cui D.; Wang Q.
发表日期	2021
ISSN	00401951
卷号	811
英文摘要	The Tian Shan mountain ranges in central Asia are one of the largest and most active intracontinental orogenic belts in the world. Its Cenozoic reactivation and deformation manifest the far-field impact of the Indian-Eurasian continental collision. How the collision-induced crustal shortening is accomondated in the Tian Shan region, however, remains debated. Some of the shortening is clearly accommodated by the piedmont fold-and-thrust belts; but the role of deformation in the interior of the orogen, and the overall pattern of crustal deformation in the Tian Shan region, differs in previous studies. We have used NeoKinema, a kinematic finite-element computer code, to analyze the long-term average rates of strain and its partitioning in the Tian Shan region. The model is constrained by updated kinematic data sets, including fault traces, geological fault slip rates, GPS site velocities, principal stress directions, and kinematic boundary conditions. Our results indicate that, in addition to shortening in the piedmont fold-and-thrust belts, significant shortening and strike-slip faulting have occurred in the interior of the Tian Shan orogen. The intra-orogen strain is concentrated north of the Nalati Fault, around the intramontane basins. The overall pattern of crustal deformation in the Tian Shan region is pure shear shortening, facilitated by NEE-trending sinistral and NW-NWW trending dextral strike-slip faults that cut across the mountain ranges. We also calculated the long-term potential of seismicity in the region and compared it with earthquake records. © 2021 Elsevier B.V.
关键词	Intercontinantal mountain building Long-term fault slip rate Regional strain rates Seismicity forecast The Tian Shan orogen
英文关键词	Deformation; Earthquakes; Kinematics; Landforms; Strain rate; Strike-slip faults; Continental collisions; Crustal deformations; Earthquake records; Finite element computer code; Fold-and-thrust belts; Kinematic boundary conditions; Long-term potential; Strike slip faulting; Fault slips
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/208011
作者单位	Second Monitoring and Application Center, China Earthquake Administration, Xi'an, China; Department of Geological Science, University of Missouri, Columbia, MO, United States
推荐引用方式 GB/T 7714	Li Y.,Liu M.,Hao M.,et al. Active crustal deformation in the Tian Shan region, central Asia[J],2021,811.
APA	Li Y.,Liu M.,Hao M.,Zhu L.,Cui D.,&Wang Q..(2021).Active crustal deformation in the Tian Shan region, central Asia.Tectonophysics,811.
MLA	Li Y.,et al."Active crustal deformation in the Tian Shan region, central Asia".Tectonophysics 811(2021).