Vanadium isotope records of the transformation from carbonated melt to alkali basalt
文献类型：期刊论文
| 作者 | Chen, Zhenwu5; Ding, Xin1,5; Zhang, Guo-Liang2,3,4; Huang, Fang1,5 |
| 刊名 | CHEMICAL GEOLOGY
 |
| 出版日期 | 2024-11-05 |
| 卷号 | 667页码:10 |
| 关键词 | Vanadium isotopes Alkali basalt Carbonated melt Melt-rock reaction Fractional crystallization |
| ISSN号 | 0009-2541 |
| DOI | 10.1016/j.chemgeo.2024.122329 |
| 通讯作者 | Ding, Xin(xinding@ustc.edu.cn) |
| 英文摘要 | Volcanic clasts from the International Ocean Discovery Program Site U1431 in the South China Sea (SCS) were analyzed for V isotopic compositions in this study. These volcanic clasts represent mantle-derived carbonated melts and record the transition from carbonated melts to alkali basalts. Based on the formation sequence, these clast samples were divided into early-stage (> 8.3 Ma) and late-stage (< 8.3 Ma) clasts. The early-stage volcanic clasts have delta 51V values of -0.76%o to -0.67%o, which provide an estimate for the V isotopic composition of primary carbonated melts. Their V isotopic compositions are slightly heavier than those of mid-ocean ridge basalts (-0.84%o f 0.10%o) and bulk silicate Earth (-0.86%o to -0.91%o), reflecting the control of low-degree partial melting under conditions of high oxygen fugacity. The late-stage volcanic clasts have delta 51V values ranging from -0.62%o to 0.29%o, which are systematically heavier than those of early-stage volcanic clasts. The carbonated melts rose through and reacted with the lithospheric mantle and were transformed into alkali basalts by dissolving orthopyroxene and precipitating olivine and/or clinopyroxene. Because the reactants and reaction products do not lead to significant V isotope fractionation, the V isotopes show limited variations during transformation from carbonated melts to alkali basalts. The alkali basalts were emplaced into shallow crust by multiple pulses, in which the magma experienced variable degrees of magma differentiation, with delta 51V values close to those of the initial alkali basalts or increasing due to fractional crystallization of Fe-Ti oxides. The change in V isotopic compositions from early-stage volcanic clasts to late-stage volcanic clasts was driven by the varying magnitude of influence exerted by different magmatic processes en route from the deep mantle to the shallow crust. |
| WOS关键词 | SOUTH CHINA SEA ; 3 GPA ; TRACE-ELEMENTS ; RICH MELTS ; MANTLE ; ECLOGITE ; SILICATE ; PERIDOTITE ; GENESIS ; DIFFERENTIATION |
| 资助项目 | National Key Research and Development Program of China[2019YFA0708400] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001298920100001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/198212]  |
| 专题 | 海洋研究所_海洋地质与环境重点实验室 |
| 通讯作者 | Ding, Xin |
| 作者单位 | 1.Univ Sci & Technol China, CAS Ctr Excellence Comparat Planetol, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Ctr Deep Sea Res, Qingdao 266071, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 4.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China 5.Univ Sci & Technol China, Sch Earth & Space Sci, State Key Lab Lithospher & Environm Coevolut, Hefei 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Zhenwu,Ding, Xin,Zhang, Guo-Liang,et al. Vanadium isotope records of the transformation from carbonated melt to alkali basalt[J]. CHEMICAL GEOLOGY,2024,667:10. |
| APA | Chen, Zhenwu,Ding, Xin,Zhang, Guo-Liang,&Huang, Fang.(2024).Vanadium isotope records of the transformation from carbonated melt to alkali basalt.CHEMICAL GEOLOGY,667,10. |
| MLA | Chen, Zhenwu,et al."Vanadium isotope records of the transformation from carbonated melt to alkali basalt".CHEMICAL GEOLOGY 667(2024):10. |
入库方式： OAI收割
来源：海洋研究所
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