气候变化领域集成服务门户(CCPortal): Lower Crustal Rheology Controls the Development of Large Offset Strike-Slip Faults During the Himalayan-Tibetan Orogeny

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DOI	10.1029/2020GL089435
	Lower Crustal Rheology Controls the Development of Large Offset Strike-Slip Faults During the Himalayan-Tibetan Orogeny
	Yang J.; Kaus B.J.P.; Li Y.; Leloup P.H.; Popov A.A.; Lu G.; Wang K.; Zhao L.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:18
英文摘要	The mechanism of crustal deformation and the development of large offset strike-slip faults during continental collision, such as the India-Eurasia zone, remains poorly understood. Previous mechanical models were simplified which are either (quasi-)2-D approximations or made the a priori assumption that the rheology of the lithosphere was either purely viscous (distributed deformation) or purely localized. Here we present three-dimensional visco-elasto-plastic thermo-mechanical simulations, which can produce both distributed and highly localized deformation, to investigate crustal deformation during continental indentation. Our results show that large-scale shear zones develop as a result of frictional plasticity, which have many similarities with observed shear zones. Yet localized deformation requires both a strong upper crust (>1022 Pa·s) and a moderately weak middle/lower crust (~1020 Pa·s) in Tibet. The brittle shear zones in our models develop low viscosity zones directly beneath them, consistent with geological observations of exhumed faults, and geophysical observations across active faults. ©2020. The Authors.
英文关键词	Deformation; Elasticity; Strike-slip faults; Thermomechanical treatment; 2-D approximation; Continental collisions; Crustal deformations; Distributed deformation; Geophysical observations; Localized deformations; Low viscosity zone; Thermomechanical simulation; Fault slips; active fault; continental collision; crustal deformation; fault; Himalayan orogeny; lower crust; rheology; shear zone; strike-slip fault; China; Eurasia; India; Xizang
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169758
作者单位	State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China; Institute of Geosciences, Johannes Gutenberg University Mainz, Mainz, Germany; Dipartimento di Geoscienze, Università di Padova, Padova, Italy; Laboratoire de Géologie de Lyon, Université de Lyon 1, ENS de Lyon, CNRS, UMR 5276 LGL-TPE, Villeurbanne, France
推荐引用方式 GB/T 7714	Yang J.,Kaus B.J.P.,Li Y.,et al. Lower Crustal Rheology Controls the Development of Large Offset Strike-Slip Faults During the Himalayan-Tibetan Orogeny[J],2020,47(18).
APA	Yang J..,Kaus B.J.P..,Li Y..,Leloup P.H..,Popov A.A..,...&Zhao L..(2020).Lower Crustal Rheology Controls the Development of Large Offset Strike-Slip Faults During the Himalayan-Tibetan Orogeny.Geophysical Research Letters,47(18).
MLA	Yang J.,et al."Lower Crustal Rheology Controls the Development of Large Offset Strike-Slip Faults During the Himalayan-Tibetan Orogeny".Geophysical Research Letters 47.18(2020).