Institutional Repository of Key Laboratory of Marine Ecology & Environmental Sciences, CAS
| Classification of a Complexly Mixed Magnetic Mineral Assemblage in Pacific Ocean Surface Sediment by Electron Microscopy and Supervised Magnetic Unmixing | |
Li, Jinhua1,2,3,4; Liu, Yan1,2,3,4 ; Liu, Shuangchi1,4; Roberts, Andrew Philip5; Pan, Hongmiao3,6; Xiao, Tian3,6; Pan, Yongxin1,2,3,4
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| 2020-12-22 | |
| 发表期刊 | FRONTIERS IN EARTH SCIENCE
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| 卷号 | 8页码:18 |
| 通讯作者 | Li, Jinhua([email protected]) |
| 摘要 | Unambiguous magnetic mineral identification in sediments is a prerequisite for reconstructing paleomagnetic and paleoenvironmental information from environmental magnetic parameters. We studied a deep-sea surface sediment sample from the Clarion Fracture Zone region, central Pacific Ocean, by combining magnetic measurements and scanning and transmission electron microscopic analyses. Eight titanomagnetite and magnetite particle types are recognized based on comprehensive documentation of crystal morphology, size, spatial arrangements, and compositions, which are indicative of their corresponding origins. Type-1 particles are detrital titanomagnetites with micron- and submicron sizes and irregular and angular shapes. Type-2 and -3 particles are well-defined octahedral titanomagnetites with submicron and nanometer sizes, respectively, which are likely related to local hydrothermal and volcanic activity. Type-4 particles are nanometer-sized titanomagnetites hosted within silicates, while type-5 particles are typical dendrite-like titanomagnetites that likely resulted from exsolution within host silicates. Type-6 particles are single domain magnetite magnetofossils related to local magnetotactic bacterial activity. Type-7 particles are superparamagnetic magnetite aggregates, while Type-8 particles are defect-rich single crystals composed of many small regions. Electron microscopy and supervised magnetic unmixing reveal that type-1 to -5 titanomagnetite and magnetite particles are the dominant magnetic minerals. In contrast, the magnetic contribution of magnetite magnetofossils appears to be small. Our work demonstrates that incorporating electron microscopic data removes much of the ambiguity associated with magnetic mineralogical interpretations in traditional rock magnetic measurements. |
| 关键词 | marine sediments magnetic minerals environmental magnetism magnetic techniques transmission electron microscopy magnetofossils titanomagnetite |
| DOI | 10.3389/feart.2020.609058 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | National Natural Science Foundation of China[41920104009]; National Natural Science Foundation of China[41890843]; National Natural Science Foundation of China[41621004]; Australian Research Council[DP160100805]; Australian Research Council[DP200100765]; Senior User Project[RVKEXUE2019GZ06] |
| WOS研究方向 | Geology |
| WOS类目 | Geosciences, Multidisciplinary |
| WOS记录号 | WOS:000604602600001 |
| 出版者 | FRONTIERS MEDIA SA |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/169546 |
| 专题 | 海洋生态与环境科学重点实验室 |
| 通讯作者 | Li, Jinhua |
| 作者单位 | 1.Chinese Acad Sci, Innovat Acad Earth Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao, Peoples R China 3.CNRS CAS, Int Associated Lab Evolut & Dev Magnetotact Multi, Beijing, Peoples R China 4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 5.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT, Australia 6.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Jinhua,Liu, Yan,Liu, Shuangchi,et al. Classification of a Complexly Mixed Magnetic Mineral Assemblage in Pacific Ocean Surface Sediment by Electron Microscopy and Supervised Magnetic Unmixing[J]. FRONTIERS IN EARTH SCIENCE,2020,8:18. |
| APA | Li, Jinhua.,Liu, Yan.,Liu, Shuangchi.,Roberts, Andrew Philip.,Pan, Hongmiao.,...&Pan, Yongxin.(2020).Classification of a Complexly Mixed Magnetic Mineral Assemblage in Pacific Ocean Surface Sediment by Electron Microscopy and Supervised Magnetic Unmixing.FRONTIERS IN EARTH SCIENCE,8,18. |
| MLA | Li, Jinhua,et al."Classification of a Complexly Mixed Magnetic Mineral Assemblage in Pacific Ocean Surface Sediment by Electron Microscopy and Supervised Magnetic Unmixing".FRONTIERS IN EARTH SCIENCE 8(2020):18. |
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| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| feart-08-609058.pdf（6738KB） | 期刊论文 | 出版稿 | 限制开放 | CC BY-NC-SA | 浏览 | |
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