Magnesium isotope fractionation in differentiation of mafic-alkaline-carbonatitic magma and Fe-P-REE-rich melt at Bayan Obo, China
文献类型：期刊论文
| 作者 | Yang, Kui-Feng2,3,4; Fan, Hong-Rui2,3,4; Pirajno, Franco1; Liu, Xuan5,6 |
| 刊名 | ORE GEOLOGY REVIEWS
 |
| 出版日期 | 2023-06-01 |
| 卷号 | 157页码:14 |
| 关键词 | Magnesium isotope fractionation Mafic-alkaline-carbonatitic magma Fe-P-REE-rich melt Immiscibility Bayan Obo |
| ISSN号 | 0169-1368 |
| DOI | 10.1016/j.oregeorev.2023.105466 |
| 英文摘要 | The Bayan Obo area in the North China Craton (NCC) contains the largest rare earth element (REE) resources in the world. The key to this gigantic and efficient REE accumulation has been the focal point of century-long research efforts. Intense differentiation of mantle-derived alkaline magmas is envisaged as a highly viable pro-cess for REE enrichment based on the first discovery of mafic-alkaline-carbonatitic suite in the Bayan Obo region. Geochronological and Sr-Nd-Hf-O isotopic analyses revealed that these rocks derived from a common mantle source and evolved with magmatic differentiation at 1.31 Ga to 1.32 Ga. Elemental geochemistry and Mg iso-topes in this magma series (alkaline diabase sill, syenite dyke and carbonatite) unambiguously support the differentiation model. The earliest ferrocarbonatite, with nearly undifferentiated REE concentrations, has mantle-like delta 26Mg (-0.27 +/- 0.03%o), and therefore can be considered as the original product of the mantle derived alkaline magma at Bayan Obo. The subsequent magnesiocarbonatites have a LREE enrichment feature, which is consistent with the alkaline diabase sills. The magnesiocarbonatites possess light Mg isotopic compo-sition (from -0.42%o to -0.50%o), whereas the alkaline diabase sills have heavy Mg isotopic composition (from -0.03%o to -0.05%o). This rock assemblage should present two end members, which differentiated likely by immiscibility in the chamber from a common alkaline magma. The subsequent syenite dyke has no obvious Mg isotopic variation (from -0.44%o to -0.39%o) during differentiation from the above alkaline magma. Notably, as the most important REE hosts, fine-grained ferrocarbonatites show large Mg isotopic variations (from -0.85%o to + 0.13%o) and present positive correlations with total MgO and CaO contents, but negative with total Fe2O3, P2O5 and REE contents. In fine-grained ferrocarbonatite, closely associated apatite, monazite, hematite and magnetite minerals occur as a special intergrowth texture. This unique paragenetic assemblage is likely the mineralization record of a Fe-P-REE-rich melt, which shows particular affinity of hydrothermal fluid and light Mg isotope in carbonatitic magma. By contrast, magnesian siderite phenocrysts as the early cumulates in carbonatitic magma are enriched in heavy Mg isotope (from -0.07%o to + 0.21%o). Immiscibility of Fe-P-REE-rich melt and fractional crystallization of carbonate minerals are responsible for large Mg isotope fractionation and giant REE enrichment in the Bayan Obo deposit. |
| WOS关键词 | U-TH-PB ; LIQUID IMMISCIBILITY ; OLDOINYO-LENGAI ; SILICATE ; ZIRCON ; EARTH ; SR ; ND ; HF ; SUPERCONTINENT |
| 资助项目 | National Key R&D Program of China[2021YFC2901704] ; National Natural Science Foundation of China[91962103] ; National Natural Science Foundation of China[41930430] ; Key Research Program of the Innovation Academy for Earth Science, CAS[IGGCAS-201901] ; Zhongke Developing Science and Technology Co., Ltd.[2017H1973] ; Zhongke Developing Science and Technology Co., Ltd.[ZK2018H003] |
| WOS研究方向 | Geology ; Mineralogy ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:001005096800001 |
| 出版者 | ELSEVIER |
| 资助机构 | National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program 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 ; Key Research Program of the Innovation Academy for Earth Science, CAS ; Key Research Program of the Innovation Academy for Earth Science, CAS ; Key Research Program of the Innovation Academy for Earth Science, CAS ; Key Research Program of the Innovation Academy for Earth Science, CAS ; Zhongke Developing Science and Technology Co., Ltd. ; Zhongke Developing Science and Technology Co., Ltd. ; Zhongke Developing Science and Technology Co., Ltd. ; Zhongke Developing Science and Technology Co., Ltd. ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program 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 ; Key Research Program of the Innovation Academy for Earth Science, CAS ; Key Research Program of the Innovation Academy for Earth Science, CAS ; Key Research Program of the Innovation Academy for Earth Science, CAS ; Key Research Program of the Innovation Academy for Earth Science, CAS ; Zhongke Developing Science and Technology Co., Ltd. ; Zhongke Developing Science and Technology Co., Ltd. ; Zhongke Developing Science and Technology Co., Ltd. ; Zhongke Developing Science and Technology Co., Ltd. ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program 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 ; Key Research Program of the Innovation Academy for Earth Science, CAS ; Key Research Program of the Innovation Academy for Earth Science, CAS ; Key Research Program of the Innovation Academy for Earth Science, CAS ; Key Research Program of the Innovation Academy for Earth Science, CAS ; Zhongke Developing Science and Technology Co., Ltd. ; Zhongke Developing Science and Technology Co., Ltd. ; Zhongke Developing Science and Technology Co., Ltd. ; Zhongke Developing Science and Technology Co., Ltd. ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program 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 ; Key Research Program of the Innovation Academy for Earth Science, CAS ; Key Research Program of the Innovation Academy for Earth Science, CAS ; Key Research Program of the Innovation Academy for Earth Science, CAS ; Key Research Program of the Innovation Academy for Earth Science, CAS ; Zhongke Developing Science and Technology Co., Ltd. ; Zhongke Developing Science and Technology Co., Ltd. ; Zhongke Developing Science and Technology Co., Ltd. ; Zhongke Developing Science and Technology Co., Ltd. |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/111208]  |
| 专题 | 地质与地球物理研究所_中国科学院矿产资源研究重点实验室 |
| 通讯作者 | Yang, Kui-Feng |
| 作者单位 | 1.Univ Western Australia, Ctr Explorat Targeting, 35 Stirling Highway, Crawley, WA 6009, Australia 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China 5.Univ Lorraine, CNRS, CREGU, GeoRessources, F-54000 Nancy, France 6.Geol Survey Finland, POB 96, FI-02151 Espoo, Finland |
| 推荐引用方式 GB/T 7714 | Yang, Kui-Feng,Fan, Hong-Rui,Pirajno, Franco,et al. Magnesium isotope fractionation in differentiation of mafic-alkaline-carbonatitic magma and Fe-P-REE-rich melt at Bayan Obo, China[J]. ORE GEOLOGY REVIEWS,2023,157:14. |
| APA | Yang, Kui-Feng,Fan, Hong-Rui,Pirajno, Franco,&Liu, Xuan.(2023).Magnesium isotope fractionation in differentiation of mafic-alkaline-carbonatitic magma and Fe-P-REE-rich melt at Bayan Obo, China.ORE GEOLOGY REVIEWS,157,14. |
| MLA | Yang, Kui-Feng,et al."Magnesium isotope fractionation in differentiation of mafic-alkaline-carbonatitic magma and Fe-P-REE-rich melt at Bayan Obo, China".ORE GEOLOGY REVIEWS 157(2023):14. |
入库方式： OAI收割
来源：地质与地球物理研究所
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