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Slab-triggered wet upwellings produce large volumes of melt: Insights into the destruction of the North China Craton
Yang, Jianfeng1,2,3; Zhao, Liang1; Kaus, Boris J. P.2; Lu, Gang1; Wang, Kun1; Zhu, Rixiang1
2018-10-30
发表期刊TECTONOPHYSICS
ISSN0040-1951
卷号746页码:266-279
摘要Cratons have remained stable for billions of years, despite of ongoing mantle convection and plate tectonics. The North China Craton (NCC), however, is abnormal, as it has experienced a destruction event during the Mesozoic and Cenozoic which was accompanied by extensive magmatism. Several lines of evidence suggest that the (Paleo-)Pacific plate played an important role in this event. Yet, the geodynamic link between subduction and craton destruction remains poorly understood, and it is unclear why there is no systematic spatial and temporal variation of magmatism related to subduction. Here, we perform 2-D petrological-thermomechanical simulations to investigate the influence of subduction dynamics and (de)hydration processes, on craton destruction. Results show that: (1) cold slabs may transport considerable amounts of water into the mantle transition zone; (2) the subducted slab triggers wet upwellings from the transition zone that result in partial melting. Subsequently formed buoyant melt regions percolate the base of the craton, which results in a mixed magma source, deriving from the continental mantle lithosphere (CML), the asthenosphere and the oceanic crust. This is consistent with the geochemical signatures observed in 90-40 Ma rocks in the NCC; (3) cratons are more prone to be destructed by mantle convection if they are more buoyant and the subducting plate has higher water content. Our results suggest that refertilization of the cratonic mantle lithosphere by slab-triggered wet upwellings is physically a plausible mechanism of decratonization. Our model might also be applicable to the destruction of Wyoming craton in North America. (C) 2017 Elsevier B.V. All rights reserved.
关键词Numerical modeling Craton destruction Lithosphere thinning Intraplate volcanism Dehydration
DOI10.1016/j.tecto.2017.04.009
资助者National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution, China ; State Key Laboratory of Lithospheric Evolution, China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution, China ; State Key Laboratory of Lithospheric Evolution, China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution, China ; State Key Laboratory of Lithospheric Evolution, China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution, China ; State Key Laboratory of Lithospheric Evolution, China
关键词[WOS]METAMORPHIC CORE COMPLEXES ; MANTLE TRANSITION ZONE ; RECYCLED OCEANIC-CRUST ; LITHOSPHERIC MANTLE ; NE CHINA ; CONTINENTAL-CRUST ; LATERAL VARIATION ; HYDROUS SILICATE ; CENOZOIC BASALTS ; WATER TRANSPORT
语种英语
资助项目National Natural Science Foundation of China[91414301] ; National Natural Science Foundation of China[41625016] ; National Natural Science Foundation of China[41304074] ; State Key Laboratory of Lithospheric Evolution, China[201703]
资助者National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution, China ; State Key Laboratory of Lithospheric Evolution, China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution, China ; State Key Laboratory of Lithospheric Evolution, China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution, China ; State Key Laboratory of Lithospheric Evolution, China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution, China ; State Key Laboratory of Lithospheric Evolution, China
WOS研究方向Geochemistry & Geophysics
WOS类目Geochemistry & Geophysics
WOS记录号WOS:000453495600017
出版者ELSEVIER SCIENCE BV
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.iggcas.ac.cn/handle/132A11/90281
专题岩石圈演化国家重点实验室
通讯作者Zhao, Liang; Kaus, Boris J. P.
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Johannes Gutenberg Univ Mainz, Inst Geosci, D-55128 Mainz, Germany
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Yang, Jianfeng,Zhao, Liang,Kaus, Boris J. P.,et al. Slab-triggered wet upwellings produce large volumes of melt: Insights into the destruction of the North China Craton[J]. TECTONOPHYSICS,2018,746:266-279.
APA Yang, Jianfeng,Zhao, Liang,Kaus, Boris J. P.,Lu, Gang,Wang, Kun,&Zhu, Rixiang.(2018).Slab-triggered wet upwellings produce large volumes of melt: Insights into the destruction of the North China Craton.TECTONOPHYSICS,746,266-279.
MLA Yang, Jianfeng,et al."Slab-triggered wet upwellings produce large volumes of melt: Insights into the destruction of the North China Craton".TECTONOPHYSICS 746(2018):266-279.
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