W-Fe isotopes argue against OIB-like basalts in Inner Mongolia originating from primordial peridotite mantle
文献类型：期刊论文
| 作者 | Lei, Ming1,2,3; Suzuki, Katsuhiko3; Kurisu, Minako3; Kashiwabara, Teruhiko3; Kikuchi, Junko3; Watakabe, Ayako3; Xu, Jifeng4; Guo, Zhengfu5; Chen, Jianlin1,2
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| 刊名 | CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
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| 出版日期 | 2024-12-01 |
| 卷号 | 179期号:12页码:15 |
| 关键词 | W-Fe isotopes Chifeng basalts Ancient primordial mantle DMM Pyroxenite Late Cenozoic |
| ISSN号 | 0010-7999 |
| DOI | 10.1007/s00410-024-02186-1 |
| 英文摘要 | Whether Inner Mongolia OIB-like basalts originate from the modern upper mantle [e.g. depleted MORB mantle (DMM)] with recycled oceanic crust in the form of pyroxenite or ancient primordial mantle (lower mantle) dominated by peridotite remains unclear. This study presents high-precision W-Fe isotopic data for Late Cenozoic Chifeng basalts (CBs) in Inner Mongolia, NE China, along with their olivine compositions, to better constrain their petrogenesis. The modern mantle-like mu 182W values (mu 182W = - 3.2 +/- 3.8 to + 2.5 +/- 2.4 ppm) of the CBs indicate that they most likely originated from DMM rather than ancient primordial mantle. The CBs exhibit elevated fractional crystallization-corrected delta 56Fe values ranging from 0.09 to 0.16 parts per thousand, compared to those of primitive normal mid-ocean ridge basalts (N-MORBs; delta 56Fe = 0.03-0.07 parts per thousand). This argues against the notion that the CBs could be generated solely by the melting of DMM peridotite. The high delta 56Fe values of the CBs, coupled with their elevated olivine Fe/Mn ratios, suggest the involvement of pyroxenite in their mantle source. The absence of correlation between the Fe isotopes of CBs and Sr-Nd-Hf isotopes, along with their previously reported low delta 98/95Mo values and existing geophysical evidence, supports the idea that pyroxenite in the mantle source of the CBs was most likely generated by the reaction between DMM peridotite and recycled Pacific oceanic crust originating from the mantle transition zone beneath NE China. Therefore, we propose that the mantle source of Inner Mongolia basalts (e.g. CBs) is DMM with some recycled oceanic crust in the form of pyroxenite, without the involvement of ancient primordial mantle. Our study highlights that W-Fe isotopes of basalts can help to identify the nature of mantle source (especially the ancient primordial mantle) and offer valuable insights into mantle lithology and the causes of mantle heterogeneity both locally and globally. |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:001367108800002 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/82001]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Chen, Jianlin |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Isotope Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 2.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 3.Japan Agcy Marine Earth Sci & Technol, Submarine Resources Res Ctr, Yokosuka 2370061, Japan 4.China Univ Geosci, Sch Earth Sci & Resources, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lei, Ming,Suzuki, Katsuhiko,Kurisu, Minako,et al. W-Fe isotopes argue against OIB-like basalts in Inner Mongolia originating from primordial peridotite mantle[J]. CONTRIBUTIONS TO MINERALOGY AND PETROLOGY,2024,179(12):15. |
| APA | Lei, Ming.,Suzuki, Katsuhiko.,Kurisu, Minako.,Kashiwabara, Teruhiko.,Kikuchi, Junko.,...&Chen, Jianlin.(2024).W-Fe isotopes argue against OIB-like basalts in Inner Mongolia originating from primordial peridotite mantle.CONTRIBUTIONS TO MINERALOGY AND PETROLOGY,179(12),15. |
| MLA | Lei, Ming,et al."W-Fe isotopes argue against OIB-like basalts in Inner Mongolia originating from primordial peridotite mantle".CONTRIBUTIONS TO MINERALOGY AND PETROLOGY 179.12(2024):15. |
入库方式： OAI收割
来源：广州地球化学研究所
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