Halogen (F, Cl) Concentrations and Sr-Nd-Pb-B Isotopes of the Basaltic Andesites From the Southern Okinawa Trough: Implications for the Recycling of Subducted Serpentinites
文献类型：期刊论文
| 作者 | Zhang, Yuxiang1,2,3,4 ; Gaetani, Glenn2; Zeng, Zhigang1,3,4,5; Monteleone, Brian2; Yin, Xuebo1,3,4; Wang, Xiaoyuan1,3,4; Chen, Shuai1,3,4
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| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
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| 出版日期 | 2021-03-01 |
| 卷号 | 126期号:3页码:20 |
| ISSN号 | 2169-9313 |
| 关键词 | AOC boron isotope geochemical cycling serpentinite Sr‐ Nd isotope decoupling subduction zone |
| DOI | 10.1029/2021JB021709 |
| 通讯作者 | Zhang, Yuxiang(zhangyuxiang13@mails.ucas.ac.cn) ; Zeng, Zhigang(zgzeng@ms.qdio.ac.cn) |
| 英文摘要 | Serpentinites are increasingly recognized as playing an important role in the global geochemical cycle. However, discriminating the contributions of serpentinites to arc magmas from those of other subduction components is challenging. The Okinawa Trough is a back-arc basin developed behind the Ryukyu subduction zone, where magmas are extensively affected by sediment subduction. In this study, we reported the F-Cl concentrations and Sr-Nd-Pb-B isotopes of basaltic andesites from the Yaeyama Graben, Yonaguni Graben, and Irabu Knoll in the southern Okinawa Trough. The Irabu Knoll lavas show the most enrichment of fluid-mobile elements and F +/- Cl, and have the heaviest B isotopes (delta B-11: +6.6 +/- 1.5 parts per thousand). They also have decoupled Sr-Nd isotopes: higher Sr-87/Sr-86 (similar to 0.7049) but have no obvious decrease of Nd-143/Nd-144 (similar to 0.5128). Results from slab dehydration modeling and mixing calculations suggest that the heavy delta B-11 in the Irabu Knoll lavas is not consistent with fluids derived from altered oceanic crust (AOC), sediments, or wedge serpentinites (formed in the mantle wedge), but rather from slab serpentinites (formed within the subducting plate); sediments control the subduction input of Nd, whereas the decoupled Sr-Nd isotopes are most likely due to the excess radiogenic Sr carried by AOC fluids. Our results imply that recycling of serpentinite fluids and AOC fluids are usually coupled in subduction zones, as the arc lavas influenced by subducted serpentinite generally show Sr-Nd isotopes decoupling. The large variation of Sr-Nd-B isotopes observed in a relatively localized area is consistent with a focused migration through the mantle wedge of components from multiple sources. |
| 资助项目 | National Natural Science Foundation of China[91958213] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42020402] ; China Postdoctoral Science Foundation[2019M662454] ; Shandong Provincial Natural Science Foundation, China[ZR2020QD068] ; Shandong Provincial Natural Science Foundation, China[ZR2020MD068] ; International Partnership Program of the Chinese Academy of Sciences[133137KYSB20170003] ; Special Fund for the Taishan Scholar Program of Shandong Province[ts201511061] ; China Scholarship Council[201709410550] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | AMER GEOPHYSICAL UNION |
| WOS记录号 | WOS:000638091600039 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/170507]  |
| 专题 | 海洋研究所_海洋地质与环境重点实验室 |
| 通讯作者 | Zhang, Yuxiang; Zeng, Zhigang |
| 作者单位 | 1.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao, Peoples R China 2.Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543 USA 3.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Mineral Resources, Qingdao, Peoples R China 4.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao, Peoples R China 5.Univ Chinese Acad Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Yuxiang,Gaetani, Glenn,Zeng, Zhigang,et al. Halogen (F, Cl) Concentrations and Sr-Nd-Pb-B Isotopes of the Basaltic Andesites From the Southern Okinawa Trough: Implications for the Recycling of Subducted Serpentinites[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2021,126(3):20. |
| APA | Zhang, Yuxiang.,Gaetani, Glenn.,Zeng, Zhigang.,Monteleone, Brian.,Yin, Xuebo.,...&Chen, Shuai.(2021).Halogen (F, Cl) Concentrations and Sr-Nd-Pb-B Isotopes of the Basaltic Andesites From the Southern Okinawa Trough: Implications for the Recycling of Subducted Serpentinites.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,126(3),20. |
| MLA | Zhang, Yuxiang,et al."Halogen (F, Cl) Concentrations and Sr-Nd-Pb-B Isotopes of the Basaltic Andesites From the Southern Okinawa Trough: Implications for the Recycling of Subducted Serpentinites".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 126.3(2021):20. |
入库方式： OAI收割
来源：海洋研究所
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