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Edge-driven convection and thinning of craton lithosphere: Two-dimensional thermal-mechanical modeling
Liu, Danhong1,2; Chen, Lin1
2019-12-01
Source PublicationSCIENCE CHINA-EARTH SCIENCES
ISSN1674-7313
Volume62Issue:12Pages:2106-2120
AbstractThere are usually abrupt changes in lithospheric thickness at the boundaries between ancient cratons and adjacent young mobile belts. Lateral variations in temperature and density between the two can trigger small-scale mantle convection (edge-driven convection, EDC). Here, we use two-dimensional thermal-mechanical simulations to explore the EDC caused by the lithospheric step between a craton and a mobile belt, and its role in the thinning of the craton lithosphere. The results show that the impact of EDC on a craton depends on the properties of the craton lithosphere and on their contrasts with the adjacent mobile belt, given the same initial condition. When the craton lithospheric density is relatively large, a high-strength craton has strong ability to resist EDC, and craton lithospheric thinning is limited to the edge. In contrast, the ability of a low-strength craton to resist EDC is weak, and the craton lithosphere is gradually eroded by the downward flow, eventually leading to large-scale thinning of the cratonic lithosphere. When the craton lithospheric density is relatively small, regardless of the strength of the cratonic lithosphere, the craton can well withstand the impacts of EDC. In this case, upwelling flow drives cratonic lithosphere materials to the base of the mobile belt, and lithospheric thinning only occurs at the edge of the craton lithosphere. The Archean North China Craton (NCC) was surrounded by Phanerozoic mobile belts, and its lithospheric thinning first occurred on the northern and eastern margins, a process that lasted for a long time. We suggest that EDC has played an important role in lithospheric thinning of the NCC, in particular the initiation of lithospheric thinning, but we cannot rule out the additional contributions from other mechanisms.
KeywordEdge-driven convection Lithospheric steps Lithospheric thinning Numerical modeling Craton
DOI10.1007/s11430-019-9371-0
Funding OrganizationNational Key Research and Development of China ; National Key Research and Development of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Key Research and Development of China ; National Key Research and Development of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Key Research and Development of China ; National Key Research and Development of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Key Research and Development of China ; National Key Research and Development of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences
WOS KeywordNORTH CHINA CRATON ; COLLISIONAL OROGENS ; DESTRUCTION ; MANTLE ; BENEATH ; SUBDUCTION ; DYNAMICS ; DELAMINATION ; LONGEVITY ; ACCRETION
Language英语
Funding ProjectNational Key Research and Development of China[2016YFC0600406] ; Chinese Academy of Sciences[XDB18000000]
Funding OrganizationNational Key Research and Development of China ; National Key Research and Development of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Key Research and Development of China ; National Key Research and Development of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Key Research and Development of China ; National Key Research and Development of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Key Research and Development of China ; National Key Research and Development of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000509534600017
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95597
Collection岩石圈演化国家重点实验室
Corresponding AuthorChen, Lin
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
First Author AffilicationState Key Laboratory of Lithospheric Evolution
Corresponding Author AffilicationState Key Laboratory of Lithospheric Evolution
Recommended Citation
GB/T 7714
Liu, Danhong,Chen, Lin. Edge-driven convection and thinning of craton lithosphere: Two-dimensional thermal-mechanical modeling[J]. SCIENCE CHINA-EARTH SCIENCES,2019,62(12):2106-2120.
APA Liu, Danhong,&Chen, Lin.(2019).Edge-driven convection and thinning of craton lithosphere: Two-dimensional thermal-mechanical modeling.SCIENCE CHINA-EARTH SCIENCES,62(12),2106-2120.
MLA Liu, Danhong,et al."Edge-driven convection and thinning of craton lithosphere: Two-dimensional thermal-mechanical modeling".SCIENCE CHINA-EARTH SCIENCES 62.12(2019):2106-2120.
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