DOI: 10.1038/ngeo1902
论文题名: Structure of orogenic belts controlled by lithosphere age
作者: Mouthereau F. ; Watts A.B. ; Burov E.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2013
卷: 6, 期: 9 起始页码: 785
结束页码: 789
语种: 英语
Scopus关键词: collision zone
; detachment fault
; geothermal gradient
; lithospheric structure
; orogenic belt
; Phanerozoic
; plate convergence
; plate tectonics
; thrust fault
英文摘要: The structure of a mountain belt reflects the manner in which plate convergence is accommodated in Earth's lithosphere. However, the extent to which orogenic structure is preconditioned by the thermo-mechanical conditions of the converging plates is debated. Here we re-process and analyse existing data on the amount and style of contractional deformation in 30 orogens worldwide and compare this with the lithospheric strength and age of the colliding plates. We find a correlation between orogenic deformation, and specifically the depth at which the crust decouples from the underlying plate, and the age of the lithospheric plate at the time of collision. Orogens formed from Phanerozoic lithosphere, which has high geothermal gradients and weak mantle, are characterized by several under-thrust faults that form in the mid-to-lower crust and moderate amounts of deformation, at less than 35% crustal strain. In contrast, orogens formed on older lithospheric plates, which have greater strength and higher-viscosity mantle, are characterized by a large detachment fault and large amounts of deformation, at about 70% crustal strain. We conclude that inherited lithospheric strength influences the style and amount of plate-tectonic contraction during mountain building, and thus the stability of continental subduction. Our results emphasize the influence of the deep Earth on the structural style of collisional orogens. © 2013 Macmillan Publishers Limited. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106714
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Institut des Sciences de la Terre, Université Pierre et Marie Curie, 75005 Paris, France; CNRS, Institut des Sciences de la Terre Paris (ISTEP), UMR 7193, F-75005 Paris, France; Department of Earth Sciences, University of Oxford, South Parks Road, Oxford OX1 3AN, United Kingdom
Recommended Citation:
Mouthereau F.,Watts A.B.,Burov E.. Structure of orogenic belts controlled by lithosphere age[J]. Nature Geoscience,2013-01-01,6(9)