气候变化领域集成服务门户(CCPortal): Mantle Plume-Lithosphere Interactions Beneath the Emeishan Large Igneous Province

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DOI	10.1029/2023GL106973
	Mantle Plume-Lithosphere Interactions Beneath the Emeishan Large Igneous Province
	Zhang, Anqi; Guo, Zhen; Afonso, Juan Carlos; Shellnutt, J. Gregory; Yang, Yingjie
发表日期	2024
ISSN	0094-8276
EISSN	1944-8007
起始页码	51
结束页码	2
卷号	51 期号:2
英文摘要	The formation of large igneous provinces (LIPs) has been widely believed to be linked to mantle plume activity. However, how the plume modifies the overlying lithosphere, particularly its compositional structure, remains uncertain. Here, we characterize the deep thermochemical structure beneath the Emeishan LIP (ELIP), which is a well-known Permian plume-related LIP in China, by taking a multi-observable probabilistic inversion. Our results find a clear correlation between the lithospheric composition with the ELIP's concentric zones. We infer that the fertile feature of the lithospheric mantle in the ELIP's inner zone was caused by the plume-derived fertile magmas which infiltrated into and chemically refertilized the ambient depleted lithosphere. This plume-modified lithospheric compositional structure is likely to be preserved after the plume event, while the present lithospheric thermal structure has been mainly influenced by the subsequent thermal-tectonic activity. Our results improve our understanding of the physicochemical interactions between the lithosphere and ancient plume. Gaining insights into the nature of large igneous provinces (LIPs) helps understand mass extinction and climate change in the past, since the outpouring of large accumulations of igneous rocks associated with LIPs could alter ancient climates and environments. Here, we focus on a well-known plume-related LIP during the Permian in China, Emeishan LIP (ELIP), to construct its deep thermochemical structure based on a multi-observable probabilistic inversion method. Our results suggest that the bulk fertile feature (not depleted by melt extraction) of the lithospheric mantle in the vicinity of the ELIP's inner zone was caused by the plume-derived fertile magmas which infiltrated into the ambient depleted (deficient in minerals extracted by partial melting of the rock) lithospheric mantle and chemically refertilized it by melt-rock interaction. However, the imaged thermal structure shows a large ongoing asthenospheric upwelling and small-scale thermal convection, implying that the present-day lithospheric thickness has been mainly influenced by the subsequent tectonic events. Our results improve the understanding of the physicochemical interactions between the lithosphere and ancient plume and contribute to the knowledge of the nature of LIPs. Image the thermochemical structure beneath the Emeishan Large Igneous Province via novel joint inversionsReveal plume refertilization of the lithosphere beneath the Emeishan Large Igneous Province's inner zoneImage complex mantle circulation patterns beneath the Emeishan Large Igneous Province region
英文关键词	Emeishan large igneous province; multi-observable probabilistic inversion; thermochemical structure; mantle plume-modified lithosphere
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001148152600001
来源期刊	GEOPHYSICAL RESEARCH LETTERS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/305822
作者单位	Southern University of Science & Technology; Chinese Academy of Sciences; Innovation Academy for Precision Measurement Science & Technology, CAS; Southern University of Science & Technology; University of Twente; National Taiwan Normal University; Southern University of Science & Technology
推荐引用方式 GB/T 7714	Zhang, Anqi,Guo, Zhen,Afonso, Juan Carlos,et al. Mantle Plume-Lithosphere Interactions Beneath the Emeishan Large Igneous Province[J],2024,51(2).
APA	Zhang, Anqi,Guo, Zhen,Afonso, Juan Carlos,Shellnutt, J. Gregory,&Yang, Yingjie.(2024).Mantle Plume-Lithosphere Interactions Beneath the Emeishan Large Igneous Province.GEOPHYSICAL RESEARCH LETTERS,51(2).
MLA	Zhang, Anqi,et al."Mantle Plume-Lithosphere Interactions Beneath the Emeishan Large Igneous Province".GEOPHYSICAL RESEARCH LETTERS 51.2(2024).