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Recycled oceanic gabbro produced the depleted component in hotspot magma from the Comei large igneous province in the Kerguelen mantle plume

文献类型：期刊论文

作者Chen, Long2,4,6; Wang, Yaying5; Somerville, Ian1; Zhong, Yuan2,4,6; Li, Xiaohui2,4,6; Li, Dongyong2,4,6; Deng, Jianghong3; Yu, Shengyao2,4,6; Sun, Guochao7; Zhao, Zifu7
刊名COMMUNICATIONS EARTH & ENVIRONMENT
出版日期2025-05-14
卷号6期号:1页码:12
DOI10.1038/s43247-025-02353-7
通讯作者Chen, Long(chenlong@ouc.edu.cn) ; Li, Sanzhong(sanzhong@ouc.edu.cn)
英文摘要Depleted components in hotspot magma sources remain enigmatic. Zircon delta 18O values (3.97-4.80 parts per thousand, average 4.38 parts per thousand) from depleted gabbros in the Comei province (Kerguelen plume) are lower than mantle zircons, correlating negatively with 206Pb/U238ages. Combined with ultradepleted Hf isotopes, this excludes hydrothermal alteration or crustal contamination, instead indicating mixing of heterogeneous mantle magmas with light-oxygen, Hf-depleted components. Elevated Sc/Nb and Y/Nb ratios preclude upper mantle entrainment, while light delta O-1(8) contradicts ancient melting residues. We propose these components originate from recycled high-temperature hydrothermally altered gabbroic oceanic crust, which underwent melt extraction during subduction before incorporation into the plume. Gradual delta O-1(8) increases reflect progressive consumption of these components during melting with ambient mantle. This study highlights recycled gabbroic crust's role in generating depleted hotspot magmas. Preservation and emergence of low delta O-1(8) and depleted geochemical signatures requires limited mixing with enriched/high-delta O-1(8) materials, as these fragile signatures are easily masked by geochemical overprinting.
WOS关键词OXYGEN-ISOTOPE VARIATIONS ; HF-O ISOTOPES ; U-PB AGE ; TETHYAN HIMALAYA ; SOUTHEASTERN TIBET ; ZIRCON MEGACRYSTS ; WORKING REFERENCE ; ICELANDIC MANTLE ; MAFIC MAGMATISM ; SOUTH-AFRICA
资助项目National Natural Science Foundation of China (National Science Foundation of China)[42121005] ; National Natural Science Foundation of China (National Science Foundation of China)[42488201] ; National Natural Science Foundation of China (National Science Foundation of China)[92058211] ; National Natural Science Foundation of China[ZR2022YQ32] ; Shandong Excellent Young Scientist Grant[tstp20231214] ; Shandong Excellent Young Scientist Grant[tstp20221112] ; Taishan Scholars[202172003] ; Fundamental Research Funds for the Central Universities
WOS研究方向Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences
语种英语
WOS记录号WOS:001488281300003
出版者SPRINGERNATURE
源URL[http://ir.qdio.ac.cn/handle/337002/202055]  
专题海洋研究所_深海极端环境与生命过程研究中心
通讯作者Chen, Long; Li, Sanzhong
作者单位1.Univ Coll Dublin, UCD Sch Earth Sci, Belfield, Ireland
2.Qingdao Marine Sci & Technol Ctr, Laoshan Lab, Lab Marine Mineral Resources, Qingdao, Peoples R China
3.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Ctr Ocean Mega Sci, Qingdao, Peoples R China
4.Ocean Univ China, Coll Marine Geo Sci, Qingdao, Peoples R China
5.Chinese Acad Geol Sci, Inst Geol, Beijing, Peoples R China
6.Ocean Univ China, Frontiers Sci Ctr Deep Ocean Multispheres & Earth, Key Lab Submarine Geosci & Prospecting Tech, MOE, Qingdao, Peoples R China
7.Univ Sci & Technol China, State Key Lab Lithospher & Environm Coevolut, Hefei, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Long,Wang, Yaying,Somerville, Ian,et al. Recycled oceanic gabbro produced the depleted component in hotspot magma from the Comei large igneous province in the Kerguelen mantle plume[J]. COMMUNICATIONS EARTH & ENVIRONMENT,2025,6(1):12.
APA Chen, Long.,Wang, Yaying.,Somerville, Ian.,Zhong, Yuan.,Li, Xiaohui.,...&Li, Sanzhong.(2025).Recycled oceanic gabbro produced the depleted component in hotspot magma from the Comei large igneous province in the Kerguelen mantle plume.COMMUNICATIONS EARTH & ENVIRONMENT,6(1),12.
MLA Chen, Long,et al."Recycled oceanic gabbro produced the depleted component in hotspot magma from the Comei large igneous province in the Kerguelen mantle plume".COMMUNICATIONS EARTH & ENVIRONMENT 6.1(2025):12.

入库方式： OAI收割

来源：海洋研究所

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