Titanium isotopic fractionation during alkaline magma differentiation at St. Helena Island
文献类型：期刊论文
| 作者 | Zhao, Xinmiao1,8; Wang, Xiao-Jun7; Jia, Xiliang1,6; Evans, Noreen J.2; Yi, Chunxia1,6; Chen, Li-Hui7; Hanyu, Takeshi3; Li, Jin5; Wan, Bo1,8; Zhu, Xiangkun5 |
| 刊名 | CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
 |
| 出版日期 | 2024 |
| 卷号 | 179期号:1页码:14 |
| ISSN号 | 0010-7999 |
| 关键词 | Ti isotopes Isotope fractionation Alkaline magma differentiation Fe-Ti oxides St. Helena Island |
| DOI | 10.1007/s00410-023-02085-x |
| 英文摘要 | To better understand the behavior of Ti isotope fractionation during alkaline magma differentiation, we studied well characterized alkaline lavas from St. Helena Island (South Atlantic), as well as their titanomagnetite separates. The lavas are classified into three groups according to petrographic observations and major element composition. Group 1 and Group 2 samples (5 to > 13 wt.% MgO) have a narrow delta Ti-49/47 range (- 0.02 to 0.05 parts per thousand), suggesting that Ti isotopic fractionation is insignificant in less evolved basaltic lavas. Conversely, Group 3 samples (MgO < 5 wt.%) are saturated with titanomagnetite and display a wide range in delta Ti-49/47 (- 0.02 to 1.96 parts per thousand). The delta Ti-49/47 values for Group 3 samples show significant correlation with TiO2 and SiO2 content, as well as with Mg and Fe isotopic values. Moreover, titanomagnetite phenocrysts from Group 3 rocks have remarkably lighter delta Ti-49/47 values (- 0.54 to 0.01 parts per thousand) relative to the corresponding whole rock (- 0.02 to 0.21 parts per thousand), indicating that titanomagnetite crystallization exerts significant control over the delta Ti-49/47 of Group 3 samples. These observations are further supported by modeling calculations. Together with published Ti isotope data, the results demonstrate that the range in Ti isotopic evolution in alkaline, calc-alkaline and tholeiitic magmatic systems is controlled by fractional crystallization of diverse Fe-Ti oxides with contrasting Ti isotopic compositions. This makes Ti stable isotopes an important geochemical tracer for magma evolution. |
| WOS关键词 | COORDINATION CHEMISTRY ; SILICATE-GLASSES ; AMBIENT-TEMPERATURE ; MELTS ; TI ; MANTLE ; FE ; REDOX ; ULVOSPINEL ; SEPARATION |
| 资助项目 | National Natural Science Foundation of China[42122020] ; National Natural Science Foundation of China[41973015] ; [2019YFA0708400] |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| 出版者 | SPRINGER |
| WOS记录号 | WOS:001132142100001 |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/111706]  |
| 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 | Zhao, Xinmiao |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Curtin Univ, John de Laeter Ctr, Perth, WA 6945, Australia 3.Japan Agcy Marine Earth Sci & Technol, Res Inst Marine Geodynam, Yokosuka 2370061, Japan 4.Zhejiang Univ, Sch Earth Sci, Hangzhou 310027, Peoples R China 5.Chinese Acad Geol Sci, Inst Geol, MLR Key Lab Isotope Geol, Beijing 100037, Peoples R China 6.Univ Chinese Acad Sci, Beijing, Peoples R China 7.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Peoples R China 8.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Xinmiao,Wang, Xiao-Jun,Jia, Xiliang,et al. Titanium isotopic fractionation during alkaline magma differentiation at St. Helena Island[J]. CONTRIBUTIONS TO MINERALOGY AND PETROLOGY,2024,179(1):14. |
| APA | Zhao, Xinmiao.,Wang, Xiao-Jun.,Jia, Xiliang.,Evans, Noreen J..,Yi, Chunxia.,...&Zhang, Hongfu.(2024).Titanium isotopic fractionation during alkaline magma differentiation at St. Helena Island.CONTRIBUTIONS TO MINERALOGY AND PETROLOGY,179(1),14. |
| MLA | Zhao, Xinmiao,et al."Titanium isotopic fractionation during alkaline magma differentiation at St. Helena Island".CONTRIBUTIONS TO MINERALOGY AND PETROLOGY 179.1(2024):14. |
入库方式： OAI收割
来源：地质与地球物理研究所
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