Serpentinite dehydration-driven redox heterogeneity in cold subduction zone magmas
文献类型：期刊论文
| 作者 | Chen, Zuxing1,2,6; Teng, Fang-Zhen1; Zhang, Yuxiang2,6; Qin, Liping3; Huo, Jinjing3; Stern, Robert J.4; Liu, Jia5; Lei, Jing3; Zeng, Zhigang2,6 |
| 刊名 | EARTH AND PLANETARY SCIENCE LETTERS
 |
| 出版日期 | 2025-10-01 |
| 卷号 | 667页码:9 |
| 关键词 | Cr isotope Serpentinite dehydration Oxygen fugacity Arc magma |
| ISSN号 | 0012-821X |
| DOI | 10.1016/j.epsl.2025.119537 |
| 通讯作者 | Chen, Zuxing(chenzuxing14@mails.ucas.ac.cn) ; Zeng, Zhigang(zgzeng@ms.qdio.ac.cn) |
| 英文摘要 | Serpentinite-derived slab fluids likely control the oxidation state of the sub-arc mantle, yet their oxidation state remains controversial. To address this issue, we report the first set of redox-sensitive chromium isotopic data for arc and back-arc basin lavas. Samples from the Mariana Arc and eastern Manus Basin have heavier Cr isotopic compositions (delta 53Cr = -0.13 to -0.18 %o) than the MORB-like delta 53Cr values in the Mariana back-arc basin (-0.21 to -0.31 %o). The delta 53Cr values correlate with Ba/La and V/Yb ratios, suggesting the control of slab-derived fluids on across-arc Cr isotope and oxygen fugacity variations. The Cr6+-bearing oxidized alkaline fluids released by serpentinite dehydration at sub-arc depths are enriched in heavy Cr isotopes. Their infiltration and reactions with the overlying mantle wedge facilitate the sub-arc oxidation of Fe2+ to Fe3+ and Cr2+ to Cr3+, resulting in heavy Cr isotopes and high oxygen fugacity in arc magmas. Oxidized fluids diminish beyond sub-arc depths due to the complete breakdown of antigorite, thus back-arc basin basalts have MORB-like delta 53Cr values and low oxygen fugacity. Our study suggests that Cr isotopes can provide critical insights into the role of serpentinite-derived fluids in redox heterogeneity in subduction-related magmas. |
| WOS关键词 | BACK-ARC BASIN ; CHROMIUM ISOTOPIC COMPOSITION ; NORTHERN MARIANA TROUGH ; CERRO DEL ALMIREZ ; MANTLE XENOLITHS ; FRACTIONATION ; ELEMENT ; BASALTS ; WATER ; FE |
| 资助项目 | National Key Research and Development Program of China[2023YFF0804301] ; Shandong Provincial Natural Science Foundation, China[ZR2024MD013] ; National Natural Science Foundation of China[42106083] ; National Natural Science Foundation of China[42330409] ; National Natural Science Foundation of China[42221005] ; Taishan Scholars Program |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001537010500001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/202695]  |
| 专题 | 海洋研究所_海洋环流与波动重点实验室 |
| 通讯作者 | Chen, Zuxing; Zeng, Zhigang |
| 作者单位 | 1.Univ Washington, Dept Earth & Space Sci, Isotope Lab, Seattle, WA 98195 USA 2.Qingdao Marine Sci & Technol Ctr, Lab Marine Mineral Resources, Qingdao 266237, Peoples R China 3.USTC, State Key Lab Lithospher & Environm Coevolut, Hefei 230026, Peoples R China 4.Univ Texas Dallas, Dept Sustainable Earth Syst Sci, Box 830688, Richardson, TX 75083 USA 5.Inst Deep Space Sci, Deep Space Explorat Lab, Hefei 230026, Peoples R China 6.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Observat & Forecasting, Key Lab Marine Geol & Environm, Qingdao 266071, Shandong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Zuxing,Teng, Fang-Zhen,Zhang, Yuxiang,et al. Serpentinite dehydration-driven redox heterogeneity in cold subduction zone magmas[J]. EARTH AND PLANETARY SCIENCE LETTERS,2025,667:9. |
| APA | Chen, Zuxing.,Teng, Fang-Zhen.,Zhang, Yuxiang.,Qin, Liping.,Huo, Jinjing.,...&Zeng, Zhigang.(2025).Serpentinite dehydration-driven redox heterogeneity in cold subduction zone magmas.EARTH AND PLANETARY SCIENCE LETTERS,667,9. |
| MLA | Chen, Zuxing,et al."Serpentinite dehydration-driven redox heterogeneity in cold subduction zone magmas".EARTH AND PLANETARY SCIENCE LETTERS 667(2025):9. |
入库方式： OAI收割
来源：海洋研究所
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