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Nature of the Mantle Plume Under the Emeishan Large Igneous Province: Constraints From Olivine-Hosted Melt Inclusions of the Lijiang Picrites

文献类型：期刊论文

作者Zhang, Lei1,2,6; Ren, Zhong-Yuan1,3,6; Zhang, Le1,6; Wu, Ya-Dong3,4,6; Qian, Sheng-Ping5,6; Xia, Xiao-Ping1,3,6; Xu, Yi-Gang1,3,6
刊名JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
出版日期2021-05-01
卷号126期号:5页码:26
关键词Al-in-ol thermometer EM1 Emeishan large igneous province melt inclusion recycled component
ISSN号2169-9313
DOI10.1029/2020JB021022
英文摘要Olivine-hosted melt inclusions have the potential to provide direct evidence about the nature of the mantle sources of magmas. In this study, we report the major and trace element and Sr-Nd-Pb-Hf isotope compositions of the Lijiang picrites from the Emeishan large igneous province, as well as major and trace element and Pb isotopic compositions of olivine-hosted melt inclusions in the picrites. Using these data, we infer the nature of the mantle sources for the Lijiang high-Ti picrites (Ti/Y = 645-654), and compare them with the Dali low-Ti picrites (Ti/Y = 351-408). Lijiang melt inclusions have highly heterogeneous Pb isotope compositions (Pb-208/Pb-206 = 2.015-2.201, Pb-207/Pb-206 = 0.812-0.882, 260 Ma age-corrected) that overlap the majority of the fields from FOZO to enriched mantle 1 (EM1). The primitive mantle-normalized trace element patterns of these melt inclusions reveal an enriched composition with depletions in Ba, Nb, Ta, Zr, and Hf. We suggest that an old recycled GLOSS II-like sediment was probably the main component that imparted the EM1 signature into the sources of the Lijiang picrites. Furthermore, we reverse calculated the mantle potential temperature (T-p) beneath Lijiang and Dali using the Al-in-ol temperature. The estimated mantle T-p beneath Lijiang is lower than Dali. We infer that the Lijiang picrites might have originated from the mantle plume with lower thermal energy, corresponding to the waning stage of the axis of the Emeishan mantle plume. Our study suggest that high-Ti magmas of the Emeishan large igneous province were derived from those parts or stages of the mantle plume with lower thermal energy.
WOS关键词CONTINENTAL FLOOD BASALTS ; ND ISOTOPE GEOCHEMISTRY ; RECYCLED OCEANIC-CRUST ; U-PB GEOCHRONOLOGY ; TI OXIDE DEPOSIT ; TRACE-ELEMENT ; SW CHINA ; CHEMICAL-STRUCTURE ; SOUTHWEST CHINA ; LITHOSPHERE INTERACTION
资助项目Strategic Priority Research Program (B) of the Chinese Academy of Sciences[XDB18000000] ; National Natural Science Foundation of China[41672057] ; Natural Science Foundation of Guangdong Province of China[2021A1515017789]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000654526100032
出版者AMER GEOPHYSICAL UNION
资助机构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 ; Natural Science Foundation of Guangdong Province of China ; Natural Science Foundation of Guangdong Province 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 ; Natural Science Foundation of Guangdong Province of China ; Natural Science Foundation of Guangdong Province 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 ; Natural Science Foundation of Guangdong Province of China ; Natural Science Foundation of Guangdong Province 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 ; Natural Science Foundation of Guangdong Province of China ; Natural Science Foundation of Guangdong Province of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/102029]  
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Ren, Zhong-Yuan
作者单位1.CAS Ctr Excellence Deep Earth Sci, Guangzhou, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
3.Chinese Acad Sci, Inst Earth Sci, Beijing, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
5.Tongji Univ, State Key Lab Marine Geol, Shanghai, Peoples R China
6.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Lei,Ren, Zhong-Yuan,Zhang, Le,et al. Nature of the Mantle Plume Under the Emeishan Large Igneous Province: Constraints From Olivine-Hosted Melt Inclusions of the Lijiang Picrites[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2021,126(5):26.
APA Zhang, Lei.,Ren, Zhong-Yuan.,Zhang, Le.,Wu, Ya-Dong.,Qian, Sheng-Ping.,...&Xu, Yi-Gang.(2021).Nature of the Mantle Plume Under the Emeishan Large Igneous Province: Constraints From Olivine-Hosted Melt Inclusions of the Lijiang Picrites.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,126(5),26.
MLA Zhang, Lei,et al."Nature of the Mantle Plume Under the Emeishan Large Igneous Province: Constraints From Olivine-Hosted Melt Inclusions of the Lijiang Picrites".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 126.5(2021):26.

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来源：地质与地球物理研究所

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