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Crustal SiO2 Content of the Emeishan Large Igneous Province and its Implications for Magma Volume and Plumbing System

文献类型：期刊论文

作者Li, Wei1,3; Chen, Yun1,3; Xu, Yi-Gang1,2
刊名GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
出版日期2021-08-01
卷号22期号:8页码:16
关键词crust composition Emeishan large igneous province magma plumbing system receiver function SiO2-V-P V-S-V-S relationship magma volume
DOI10.1029/2021GC009783
英文摘要The Permian Emeishan large igneous province (LIP) in Southwestern China is recognized as a remnant of mantle plume activity. Its crust composition has a significant bearing on understanding the magmatic plumbing system in a LIP and the volume of magmas generated, which is critical to the viability of the mantle plume model and its potential environmental impact but is difficult to constrain. Here, a SiO2-V-P/V-S-V-S relationship, compiled from existing laboratory measurements, is used to estimate the crustal SiO2 content of the Emeishan LIP based on the joint constraint of the crustal bulk V-P/V-S ratio and average V-S. The crust underneath the northeastern inner zone of the Emeishan LIP has a SiO2 content of similar to 55.7 wt%, in contrast with the bulk continental crust's SiO2 content of 62.1 +/- 2.1 wt% but largely overlapping with the exposed mafic-ultramafic intrusions. Such an unusually "mafic" crust is attributable to the intensive magmatic underplating and intraplating associated with the Emeishan mantle plume. It further allows a minimum estimate of the volume of similar to 1.45 x 10(6) km(3) for erupted magmas and similar to 2.39 x 10(6) km(3) for total emplaced magmas, which is comparable to the volume of typical plume-generated LIPs.
WOS关键词TELESEISMIC RECEIVER FUNCTIONS ; CONTINENTAL-CRUST ; VELOCITY STRUCTURE ; WAVE VELOCITIES ; SOUTH CHINA ; SEISMIC VELOCITIES ; POISSONS RATIO ; TYPICAL ROCKS ; BENEATH ; CONSTRAINTS
资助项目National Key R&D Program of China[2017YFC0602504] ; National Key R&D Program of China[2016YFC0600402] ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences[XDB18000000] ; National Natural Science Foundation of China[41804056] ; National Natural Science Foundation of China[41374063] ; China Postdoctoral Science Foundation[2019M650034] ; China Postdoctoral Science Foundation[2020T130650]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000691021600014
出版者AMER GEOPHYSICAL UNION
资助机构National Key R&D Program of China ; National Key R&D Program of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Key R&D Program of China ; National Key R&D Program of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Key R&D Program of China ; National Key R&D Program of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Key R&D Program of China ; National Key R&D Program of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation
源URL[http://ir.iggcas.ac.cn/handle/132A11/102622]  
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Chen, Yun
作者单位1.CAS Ctr Excellence Deep Earth Sci, Guangzhou, Peoples R China
2.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou, Peoples R China
3.Chinese Acad Sci, State Key Lab Lithospher Evolut, Inst Geol & Geophys, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Li, Wei,Chen, Yun,Xu, Yi-Gang. Crustal SiO2 Content of the Emeishan Large Igneous Province and its Implications for Magma Volume and Plumbing System[J]. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,2021,22(8):16.
APA Li, Wei,Chen, Yun,&Xu, Yi-Gang.(2021).Crustal SiO2 Content of the Emeishan Large Igneous Province and its Implications for Magma Volume and Plumbing System.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,22(8),16.
MLA Li, Wei,et al."Crustal SiO2 Content of the Emeishan Large Igneous Province and its Implications for Magma Volume and Plumbing System".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 22.8(2021):16.

入库方式： OAI收割

来源：地质与地球物理研究所

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