Rock magnetic properties of uncultured magnetotactic bacteria
文献类型：期刊论文
| 作者 | Pan, YX; Petersen, N; Winklhofer, M; Davila, AF; Liu, QS; Frederichs, T; Hanzlik, M; Zhu, RX |
| 刊名 | EARTH AND PLANETARY SCIENCE LETTERS
 |
| 出版日期 | 2005-09-15 |
| 卷号 | 237期号:3-4页码:311-325 |
| 关键词 | Bacterial Magnetite Uncultured Magnetotactic Bacteria Forc Diagram Verwey Transition Single Domain |
| ISSN号 | 0012-821X |
| DOI | 10.1016/j.epsl.2005.06.029 |
| 文献子类 | Article |
| 英文摘要 | Understanding the magnetic properties of magnetite crystals (Fe3O4) produced by magnetotactic bacteria (MTBs) is of fundamental interest in fields of geosciences, biomineralization, fine particle magnetism, and planetary sciences. The database of bulk magnetic measurements on MTBs is, however, still too sparse to allow for generalizations due to difficulties in obtaining bacteria cells in sufficient quantities from natural environments, and the fact that only a few cultivable strains are available. Here we report the first series of magnetic measurements on two air-dried samples containing solely MTBs (wild-type cocci and Magnetobacterium bavaricum), which were directly isolated from carbonaceous lake sediments. Systematic rock magnetic studies show that: 1) the magnetosomes in cells are dominated by single-domain (SD) magnetite; 2) the samples have delta ratios delta(FC)/delta(ZFC) higher than 2; 3) the measured low-temperature rematience cycling curves as well as the first-order-reversalcurve (FORC) diagrams are significantly different to those measured on synthetic SD-magnetite samples; and 4) the Verwey transition temperature (T-v,similar to 100 K) of MTB cells is distinctly lower than that from stoichiometric magnetite (T-v,120-125 K). Our results provide new insights on the magnetic properties of bacterial magnetite and advance the use of magnetic proxies for decoding the paleomagnetic signals of sediments containing bacterial magnetite. (c) 2005 Elsevier B.V. All rights reserved. |
| WOS关键词 | MARTIAN METEORITE ALH84001 ; BIOGENIC MAGNETITE ; LOW-TEMPERATURE ; VERWEY TRANSITION ; DOMAIN STATE ; SEDIMENTS ; REMANENCE ; MAGNETOSOMES ; DISSOLUTION ; COERCIVITY |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000232155200001 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/65852]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Pan, YX |
| 作者单位 | 1.Chinese Acad Sci, Lab Paleomagnet Geochronol & Biogeomagnet SKL LE, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Univ Munich, Dept Earth & Environm Sci, D-8033 Martinsried, Germany 3.Univ Minnesota, Inst Rock Magnetism, Minneapolis, MN 55455 USA 4.Univ Bremen, Dept Geosci, D-28334 Bremen, Germany 5.Tech Univ Munich, Dept Chem, D-85748 Garching, Germany |
| 推荐引用方式 GB/T 7714 | Pan, YX,Petersen, N,Winklhofer, M,et al. Rock magnetic properties of uncultured magnetotactic bacteria[J]. EARTH AND PLANETARY SCIENCE LETTERS,2005,237(3-4):311-325. |
| APA | Pan, YX.,Petersen, N.,Winklhofer, M.,Davila, AF.,Liu, QS.,...&Zhu, RX.(2005).Rock magnetic properties of uncultured magnetotactic bacteria.EARTH AND PLANETARY SCIENCE LETTERS,237(3-4),311-325. |
| MLA | Pan, YX,et al."Rock magnetic properties of uncultured magnetotactic bacteria".EARTH AND PLANETARY SCIENCE LETTERS 237.3-4(2005):311-325. |
入库方式： OAI收割
来源：地质与地球物理研究所
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