Slab-triggered wet upwellings produce large volumes of melt: Insights into the destruction of the North China Craton

doi:10.1016/j.tecto.2017.04.009

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化国家重点实验室

	Slab-triggered wet upwellings produce large volumes of melt: Insights into the destruction of the North China Craton
	Yang, Jianfeng 1,2,3; Zhao, Liang 1; Kaus, Boris J. P.2; Lu, Gang 1; Wang, Kun 1; Zhu, Rixiang 1
刊名	TECTONOPHYSICS
	2018-10-30
卷号	746 页码:266-279
关键词	Numerical modeling Craton destruction Lithosphere thinning Intraplate volcanism Dehydration
ISSN号	0040-1951
DOI	10.1016/j.tecto.2017.04.009
英文摘要	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.
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]
WOS关键词	METAMORPHIC CORE COMPLEXES ; MANTLE TRANSITION ZONE ; RECYCLED OCEANIC-CRUST ; LITHOSPHERIC MANTLE ; NE CHINA ; CONTINENTAL-CRUST ; LATERAL VARIATION ; HYDROUS SILICATE ; CENOZOIC BASALTS ; WATER TRANSPORT
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000453495600017
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of 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 ; 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 ; 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 ; 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 ; 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 ; 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 ; 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 ; State Key Laboratory of Lithospheric Evolution, China ; State Key Laboratory of Lithospheric Evolution, China
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/90281]
专题	地质与地球物理研究所_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
推荐引用方式 GB/T 7714	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.