Magnetofossil Abundance and Diversity as Paleoenvironmental Proxies: A Case Study From Southwest Iberian Margin Sediments
文献类型：期刊论文
| 作者 | He, Kuang1,3,4; Pan, Yongxin1,2,3,4 |
| 刊名 | GEOPHYSICAL RESEARCH LETTERS
 |
| 出版日期 | 2020-04-28 |
| 卷号 | 47期号:8页码:10 |
| ISSN号 | 0094-8276 |
| 关键词 | magnetofossil morphology Iberian margin environmental magnetism paleoenvironmental proxy |
| DOI | 10.1029/2020GL087165 |
| 英文摘要 | It is still contentious how the abundance and diversity of magnetofossils reflect varying paleoenvironmental conditions. Here, we apply rock magnetic methods and transmission electron microscopy to identify magnetofossils in the core MD01-2444 from the southwestern Iberian margin during the period 49.6-18.5 ka and 193.8-171.7 ka. Results show a correlation between the biogenic magnetite component and contrasting paleoenvironmental conditions. Specifically, remanence ratio (M-rs/M-s), the ratio of anhysteretic susceptibility (chi(ARM)) to saturation isothermal remanant magnetization (SIRM), fractions of biogenic soft and biogenic hard components (BS + BH), and delta-delta ratio (delta(FC)/delta(ZFC)) have a negative relationship with planktonic delta O-18, suggesting that more magnetofossils existed in sediments during warmer periods. Combining transmission electron microscopy images with paleoenvironmental proxies, we found that the proportions of bullet-shaped magnetofossils increased in a warmer and less oxic environment, while isotropic shapes dominated in cooler and oxic environments. |
| WOS关键词 | REMANENCE ACQUISITION EFFICIENCY ; ORGANIC-CARBON FLUX ; DEEP-SEA SEDIMENTS ; MAGNETOTACTIC BACTERIA ; RELATIVE PALEOINTENSITY ; MAGNETIC-PROPERTIES ; DETRITAL MAGNETITE ; VARIABILITY ; MORPHOLOGY ; CYCLES |
| 资助项目 | China Postdoctoral Research Funds[2018M641461] ; National Natural Science Foundation of China[41621004] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| 出版者 | AMER GEOPHYSICAL UNION |
| WOS记录号 | WOS:000530332600021 |
| 资助机构 | China Postdoctoral Research Funds ; China Postdoctoral Research Funds ; China Postdoctoral Research Funds ; China Postdoctoral Research Funds ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Research Funds ; China Postdoctoral Research Funds ; China Postdoctoral Research Funds ; China Postdoctoral Research Funds ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Research Funds ; China Postdoctoral Research Funds ; China Postdoctoral Research Funds ; China Postdoctoral Research Funds ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Research Funds ; China Postdoctoral Research Funds ; China Postdoctoral Research Funds ; China Postdoctoral Research Funds ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/96736]  |
| 专题 | 地质与地球物理研究所_中国科学院地球与行星物理重点实验室 |
| 通讯作者 | He, Kuang |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Paleomagnetism & Geochronol Lab, Key Lab Earth & Planetary Phys, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 3.Chinese Acad Sci, France China Joint Lab Evolut & Dev Magnetotact M, Beijing, Peoples R China 4.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | He, Kuang,Pan, Yongxin. Magnetofossil Abundance and Diversity as Paleoenvironmental Proxies: A Case Study From Southwest Iberian Margin Sediments[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(8):10. |
| APA | He, Kuang,&Pan, Yongxin.(2020).Magnetofossil Abundance and Diversity as Paleoenvironmental Proxies: A Case Study From Southwest Iberian Margin Sediments.GEOPHYSICAL RESEARCH LETTERS,47(8),10. |
| MLA | He, Kuang,et al."Magnetofossil Abundance and Diversity as Paleoenvironmental Proxies: A Case Study From Southwest Iberian Margin Sediments".GEOPHYSICAL RESEARCH LETTERS 47.8(2020):10. |
入库方式： OAI收割
来源：地质与地球物理研究所
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