Extremely low δ56Fe in arc tholeiites linked to ferrocarbonate recycling: Implications for Fe enrichment in the Awulale Arc, Central Asia
文献类型：期刊论文
| 作者 | Yan, Shuang3,5; Niu, He-Cai3,5; Zhao, Zhenhua3,5; Li, Ning-bo3,5; Yang, Wu-bin3,5; Zhou, Renjie2; An, Yajun3,6; Huang, Fang1,4 |
| 刊名 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN
 |
| 出版日期 | 2024 |
| 卷号 | 136期号:1-2页码:184-200 |
| ISSN号 | 0016-7606 |
| DOI | 10.1130/B36729.1 |
| 英文摘要 | Recycling of Fe -rich materials through subduction may affect the element budgets and redox properties of the mantle, thus influencing the differentiation trends and mineralization types of mantle -derived magmas. However, the effects of different recycled Ferich materials on the mantle are dependent on their lithologies, which are still poorly constrained. Stable Fe isotopes can act as useful tracers for distinguishing among different recycled Fe -rich lithologies, and their imprints may be documented in mantle -derived magmas. This study focuses on the Fe isotopes of ferrobasalts and the associated dacites and magnetite ores in the Chagangnuoer Fe deposit of the Awulale Arc, Central Asia, to identify recycled Fe -rich materials and explore the Fe enrichment mechanism in continental arcs. Our results indicate that the ferrobasalts and dacites possess the lowest known 656Fe, -0.40%o +/- 0.04%o (2SE), among their counterparts worldwide. The low 656Fe signatures are considered to originate from a hybridized mantle source, which may have been modified by recycled ferrocarbonates. The recycled ferrocarbonates may have melted during the decompressional heating stage of the slab subduction of the South Tianshan Ocean, coupled with asthenospheric upwelling under "wet" mantle conditions. The addition of ferrocarbonate melts to the mantle might have decreased the oxygen fugacity of the mantle wedge to below the fayalite-magnetite-quartz buffer, accounting for the Fe enrichment in arc tholeiites and large-scale Fe mineralization along the Awulale. Notably, our study reveals a novel carbonate recycling pathway in the cold subduction zones, where ferrocarbonates were subducted into the mantle and then recycled by the upwelling asthenosphere to mix with the fluid-metasomatized mantle through mantle convection. |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001167650300003 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/77373]  |
| 专题 | 中国科学院广州地球化学研究所 |
| 通讯作者 | Niu, He-Cai; Huang, Fang |
| 作者单位 | 1.Univ Sci & Technol China, Key Lab Crust Mantle Mat & Environm, Chinese Acad Sci, Sch Earth & Space Sci, Hefei 230026, Peoples R China 2.Univ Queensland, Sch Earth & Environm Sci, Brisbane, Qld 4072, Australia 3.Chinese Acad Sci, Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 4.Univ Sci & Technol China, Chinese Acad Sci, Ctr Excellence Comparat Planetol, Hefei 230026, Peoples R China 5.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Mineral & Metallogeny, Guangdong Prov Key Lab Mineral Phys & Mat, Guangzhou 510640, Peoples R China 6.Chinese Acad Sci, State Key Lab Isotope Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yan, Shuang,Niu, He-Cai,Zhao, Zhenhua,et al. Extremely low δ56Fe in arc tholeiites linked to ferrocarbonate recycling: Implications for Fe enrichment in the Awulale Arc, Central Asia[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2024,136(1-2):184-200. |
| APA | Yan, Shuang.,Niu, He-Cai.,Zhao, Zhenhua.,Li, Ning-bo.,Yang, Wu-bin.,...&Huang, Fang.(2024).Extremely low δ56Fe in arc tholeiites linked to ferrocarbonate recycling: Implications for Fe enrichment in the Awulale Arc, Central Asia.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,136(1-2),184-200. |
| MLA | Yan, Shuang,et al."Extremely low δ56Fe in arc tholeiites linked to ferrocarbonate recycling: Implications for Fe enrichment in the Awulale Arc, Central Asia".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 136.1-2(2024):184-200. |
入库方式： OAI收割
来源：广州地球化学研究所
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