Determination of magnetic carriers of the characteristic remanent magnetization of Chinese loess by low-temperature demagnetization
文献类型：期刊论文
| 作者 | Liu, QS; Jackson, MJ; Banerjee, SK; Zhu, RX; Pan, YX; Chen, FH |
| 刊名 | EARTH AND PLANETARY SCIENCE LETTERS
 |
| 出版日期 | 2003-11-15 |
| 卷号 | 216期号:1-2页码:175-186 |
| 关键词 | Chinese loess characteristic remanent magnetization magnetic carrier low-temperature demagnetization paleomagnetism |
| ISSN号 | 0012-821X |
| DOI | 10.1016/S0012-821X(03)00477-1 |
| 文献子类 | Article |
| 英文摘要 | The Chinese loess/paleosol sequences can provide excellent paleomagnetic records for detailed studies on both magnetostratigraphy and secular variations of the Earth's magnetic field. However, the nature of the loess/paleosol characteristic remanent magnetization (ChRM), isolated by thermal demagnetization from the natural remanent magnetization, still remains in debate. In this study, we directly measure the thermal, alternating field, and low-temperature demagnetization (cooling/warming cycle of remanence in zero field between 300 and 50 K) spectra of ChRM of the loess samples at Touxiangdao, Xining, PR China. The results show that coarse-grained, pseudo-single-domain (PSD)/multi-domain (MD) magnetite and PSD maghemite particles are the main magnetic carriers of the loess and paleosol ChRMs, respectively. By comparing the ChRM characteristics across a loess/paleosol transition zone. we have found that during pedogenesis, the thermally separable ChRM (original detrital remanent magnetization) carried by the PSD/MD magnetite in loess is gradually overprinted by the chemical remanent magnetization carried by PSD maghemite. Even moderate pedogenesis (e.g., for the pedogenically altered loess) can strongly affect the loess ChRM. Thus more attention has to be focused on the paleosol ChRM separated solely by thermal demagnetization, especially when constructing a continuous paleomagnetic record covering both loess and paleosol units. (C) 2003 Elsevier B.V. All rights reserved. |
| WOS关键词 | MULTIDOMAIN MAGNETITE ; SATURATION REMANENCE ; PALEOSOL SEQUENCES ; SUSCEPTIBILITY RECORD ; SINGLE-CRYSTAL ; NORTHERN CHINA ; DOMAIN STATE ; GRAIN-SIZE ; DEPOSITS ; PLATEAU |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000186856300014 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/78731]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Liu, QS |
| 作者单位 | 1.Univ Minnesota, Inst Rock Magnetism, Dept Geol & Geophys, Minneapolis, MN 55455 USA 2.Chinese Acad Sci, Inst Geol & Geophys, Paleomagnetism Lab, Beijing 100029, Peoples R China 3.Lanzhou Univ, CAEP, Coll Earth & Environm Sci, Lanzhou 730000, Gansu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, QS,Jackson, MJ,Banerjee, SK,et al. Determination of magnetic carriers of the characteristic remanent magnetization of Chinese loess by low-temperature demagnetization[J]. EARTH AND PLANETARY SCIENCE LETTERS,2003,216(1-2):175-186. |
| APA | Liu, QS,Jackson, MJ,Banerjee, SK,Zhu, RX,Pan, YX,&Chen, FH.(2003).Determination of magnetic carriers of the characteristic remanent magnetization of Chinese loess by low-temperature demagnetization.EARTH AND PLANETARY SCIENCE LETTERS,216(1-2),175-186. |
| MLA | Liu, QS,et al."Determination of magnetic carriers of the characteristic remanent magnetization of Chinese loess by low-temperature demagnetization".EARTH AND PLANETARY SCIENCE LETTERS 216.1-2(2003):175-186. |
入库方式： OAI收割
来源：地质与地球物理研究所
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