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Low-δ56Fe fluid released from serpentinite as recorded by iron isotopes of Myanmar jadeitites

文献类型：期刊论文

作者Chen, An-Xia1,7; Chen, Xi1,5,6; Chen, Yi3,4; Han, Xi-Qiu7; Wang, Ye-Jian7; Huang, Fang1,2
刊名CHEMICAL GEOLOGY
出版日期2023-11-20
卷号639页码:11
ISSN号0009-2541
关键词Fe isotopes Jadeitite Subduction zone Serpentinite-derived fluid
DOI10.1016/j.chemgeo.2023.121730
英文摘要Melt extraction and subduction zone fluid infiltration can produce light Fe isotope compositions of arc lavas relative to the MORBs. However, the Fe isotope signature of subduction zone fluid is poorly constrained, which has hampered our understanding of Fe cycling in the subduction zone. Jadeitite veins in forearc serpentinite provide a unique record for the characteristics of subduction zone fluids. Here we report Fe isotope data for Myanmar jadeitites and associated rocks to constrain the Fe isotope signature of subduction zone fluids. Two types of jadeitites from Myanmar display distinct 656Fe much lower than typical igneous rocks. White jadeitites, directly precipitated from fluids, have variable 656Fe from-0.60%o to-0.04%o, while green jadeitites, formed by fluid-chromite interaction, have 656Fe (-0.44%o to-0.19%o) similar to the associated amphibole-rich blackwalls (-0.47%o to-0.23%o). The light Fe isotope signature of the jadeitites is not induced by weathering, kinetic fractionation, dissolution of Fe-rich carbonate, or mineral dissolution-reprecipitation process. Instead, it most likely reflects the Fe isotope variation of serpentinite-derived fluids. Correlations of 656Fe with REEs, Sb, and U in white jadeitites suggest that the jadeitite-forming fluid is a mixture of serpentinite-derived and sediment-derived fluids. In contrast, correlations of 656Fe with Si, Al, and Cr in green jadeitites record the interaction of low-656Fe fluids with chromite. Considering the abundance of the serpentinite-derived fluid, it can effectively influence the Fe isotope compositions of the ambient mantle and arc lavas.
WOS关键词SUBDUCTION-ZONE FLUIDS ; CIMA DI GAGNONE ; HIGH-PRESSURE ; CHUGOKU MOUNTAINS ; OCEANIC-CRUST ; FE ; FRACTIONATION ; MANTLE ; ROCKS ; AGE
资助项目Natural Science Foundation of China[42203012] ; Natural Science Foundation of China[41873009] ; National Key Research and Development Program of China[2018YFA0702600] ; China Postdoctoral Science Foundation[2023M734095]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者ELSEVIER
WOS记录号WOS:001081370200001
资助机构Natural Science Foundation of China ; Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Natural Science Foundation of China ; Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Natural Science Foundation of China ; Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Natural Science Foundation of China ; Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation
源URL[http://ir.iggcas.ac.cn/handle/132A11/110763]  
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Huang, Fang
作者单位1.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Anhui, Peoples R China
2.USTC, CAS Ctr Excellence Comparat Planetol, Hefei, Peoples R China
3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
5.Univ Chicago, Enrico Fermi Inst, 5734 South Ellis Ave, Chicago, IL 60615 USA
6.Univ Chicago, Dept Geophys Sci, Origins Lab, 5734 South Ellis Ave, Chicago, IL 60615 USA
7.Minist Nat Resources, Inst Oceanog 2, Hangzhou 310012, Peoples R China
推荐引用方式
GB/T 7714		 Chen, An-Xia,Chen, Xi,Chen, Yi,et al. Low-delta56Fe fluid released from serpentinite as recorded by iron isotopes of Myanmar jadeitites[J]. CHEMICAL GEOLOGY,2023,639:11.
APA Chen, An-Xia,Chen, Xi,Chen, Yi,Han, Xi-Qiu,Wang, Ye-Jian,&Huang, Fang.(2023).Low-δ56Fe fluid released from serpentinite as recorded by iron isotopes of Myanmar jadeitites.CHEMICAL GEOLOGY,639,11.
MLA Chen, An-Xia,et al."Low-δ56Fe fluid released from serpentinite as recorded by iron isotopes of Myanmar jadeitites".CHEMICAL GEOLOGY 639(2023):11.

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来源：地质与地球物理研究所

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