Formation of layered intrusion: A perspective from vanadium isotopes
文献类型：期刊论文
| 作者 | Lv, Wei-Xin1; Liu, Meng-Shu1; Cao, Yonghua3; Wang, Christina Yan3; Huang, Fang1,2; Ding, Xin1,2 |
| 刊名 | LITHOS
 |
| 出版日期 | 2024-10-01 |
| 卷号 | 482页码:12 |
| 关键词 | Crystallization -mush -immiscibility -layering Layered intrusions Magma evolution V isotopes |
| ISSN号 | 0024-4937 |
| DOI | 10.1016/j.lithos.2024.107699 |
| 英文摘要 | Layered intrusions, characterized by their multiple layers, serve as remarkable geological archives of magma evolution in the Earth's crust. However, the magmatic evolution processes that lead to the formation of the chemically diverse layers in the intrusions are still difficult to trace. Here we present V isotope data of whole rocks and mineral separates (clinopyroxene and magnetite) from the Panzhihua layered intrusion in southwest China. The intrusion can be divided into four zones from the base upward: the marginal zone, lower zone, middle zone and upper zone. Both the marginal and upper zones mirror the chemical compositions of the parental magma, with the V isotopic composition being about -0.83%o +/- 0.19%o (n = 4, 2 s). The lower zone is characterized by Fe-Ti oxide layers, where the whole rocks have a similar V isotopic composition as those of clinopyroxene and magnetite at each depth. The consistency in V isotopic compositions between whole rock and mineral separates reflects the control of silicate liquid immiscibility in forming the Fe-Ti oxide layers. Along the depth profile, whole rocks from the lower zone show limited variations in delta 51V values ranging from -0.82%o to -0.49%o. Such observation reveals the dynamic process of crystallization-mush-immiscibility-layering in charging the generation of repetitive oxide layers. After the formation of the lower zone, the middle zone has a large variation of delta 51V values from -0.35%o to 1.70%o, which can be attributed to fractional crystallization of FeTi oxides. Consequently, the V isotopic signatures indicate that the Panzhihua intrusion was originated from a common basaltic magma and the layering in lower and middle zones resulted from continuous evolution of a single, massive magma unit. |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:001265224000001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/78246]  |
| 专题 | 中国科学院矿物学与成矿学重点实验室 |
| 通讯作者 | Ding, Xin |
| 作者单位 | 1.Univ Sci & Technol China, Sch Earth & Space Sci, State Key Lab Lithospher & Environm Coevolut, Hefei 230026, Peoples R China 2.CAS Ctr Excellence Comparat Planetol, Hefei 230026, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lv, Wei-Xin,Liu, Meng-Shu,Cao, Yonghua,et al. Formation of layered intrusion: A perspective from vanadium isotopes[J]. LITHOS,2024,482:12. |
| APA | Lv, Wei-Xin,Liu, Meng-Shu,Cao, Yonghua,Wang, Christina Yan,Huang, Fang,&Ding, Xin.(2024).Formation of layered intrusion: A perspective from vanadium isotopes.LITHOS,482,12. |
| MLA | Lv, Wei-Xin,et al."Formation of layered intrusion: A perspective from vanadium isotopes".LITHOS 482(2024):12. |
入库方式： OAI收割
来源：广州地球化学研究所
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