DOI: 10.1002/2013GL058081
论文题名: Layered structure of the lithospheric mantle changes dynamics of craton extension
作者: Liao J. ; Gerya T. ; Wang Q.
刊名: Geophysical Research Letters
ISSN: 0094-8379
EISSN: 1944-8110
出版年: 2013
卷: 40, 期: 22 起始页码: 5861
结束页码: 5866
语种: 英语
英文关键词: continental breakup
; craton extension
; heterogeneous lithospheric mantle
; numerical geodynamic modeling
Scopus关键词: Continental break-up
; craton extension
; Extensional deformation
; Geodynamic modeling
; Layered Structures
; Lithospheric mantle
; Thermo-mechanical
; Viscoelasto plastics
; Deformation
; Geodynamics
; continental breakup
; craton
; extensional tectonics
; geodynamics
; hydration
; lithosphere
; mantle structure
; metasomatism
; numerical model
; rheology
; tectonic evolution
; thermomechanics
英文摘要: Although presence of weak layers due to hydration and/or metasomatism in the lithospheric mantle of cratons has been detected by both geophysical and geochemical studies, its influence on craton evolution remains elusive. Using a 2-D thermomechanical viscoelastoplastic numerical model, we studied the craton extension of a heterogeneous lithospheric mantle with a rheologically weak layer. Our results demonstrate that the effect of the weak mantle layer is twofold: (1) enhances deformation of the overlying lithosphere and (2) inhibits deformation of the underlying lithospheric mantle. Depending on the weak-layer depth, the Moho temperature and extension rate, three extension patterns are found (1) localized mantle necking with exposed weak layer, (2) widespread mantle necking with exposed weak layer, and (3) widespread mantle necking without exposed weak layer. The presence of the weak mantle layer reduces long-term acting boundary forces required to sustain extensional deformation of the lithosphere. ©2013. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84890468545&doi=10.1002%2f2013GL058081&partnerID=40&md5=f86693d293057ab822d40316b264247c
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5643
Appears in Collections: 气候减缓与适应
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作者单位: Geophysical Fluid Dynamics, Institute of Geophysics, ETH Zurich, Sonneggstrasse 5, CH-8092, Zurich, Switzerland
Recommended Citation:
Liao J.,Gerya T.,Wang Q.. Layered structure of the lithospheric mantle changes dynamics of craton extension[J]. Geophysical Research Letters,2013-01-01,40(22).