Two pedogenic models for paleoclimatic records of magnetic susceptibility from Chinese and Siberian loess
文献类型：期刊论文
| 作者 | Liu XiuMing1,2,5; Liu TungSheng3,5; Paul Hesse2,5; Xia DunSheng1,4,5; Jiri Chlachula4,5; Wang Guan1,5 |
| 刊名 | SCIENCE IN CHINA SERIES D-EARTH SCIENCES
 |
| 出版日期 | 2008-02-01 |
| 卷号 | 51期号:2页码:284-293 |
| 关键词 | Siberian loess Chinese loess paleoclimate magnetic susceptibility magnetic mineralogy environmental magnetism |
| ISSN号 | 1006-9313 |
| DOI | 10.1007/s11430-007-0145-2 |
| 文献子类 | Article |
| 英文摘要 | The magnetic susceptibility (MS) of Chinese loess showing a general proportional relationship to pedogenic grade has been widely recognized and used for reconstruction of paleoclimate by Quaternary scientists. The in-situ pedogenic enhancement of ferrimagnetic content is normally believed to be the main reason for the increase of susceptibility in soil units. However, this pattern of high magnetic susceptibility in palaeosols, and low values in loess, are not replicated in some loess deposits. Siberian loess deposits display a completely opposite susceptibility behavior: high values in loess and low values in palaeosols. This inverse relationship has been explained by the idea that magnetic susceptibility is reflecting the magnitude of an aeolian ferrimagnetic component of consistent mineralogy, the grain size of which is related to average wind velocity. Our magnetic study of Siberian samples in this paper suggests that there are notable differences in magnetic properties between Siberian loess and developed palaeosols, not only in magnetic grain-size and concentration but also in magnetic mineralogy. This evidence is difficult to explain fully through variation in wind strength alone, but implies that the low magnetic susceptibility values in the Siberian paleosol units are a reflection, at least in part, of the alteration of the ferrimagnetic content by post-depositional processes. The Loess Plateau is a very arid area where potential evaporation is always higher than precipitation; pedogenesis occurs under dry oxidising conditions. The Siberian Kurtak region is located on the edge of the tundra where it is always wet and saturation during interglacials will lead to a reducing pedogenic environment. Ferrimagnetic minerals under this condition will be destroyed, resulting in lower magnetic susceptibility. Therefore, great care should be taken when using susceptibility values for paleoclimatic reconstruction. |
| WOS关键词 | LATE QUATERNARY ; CENTRAL ALASKA ; IRON SULFIDES ; DEPOSITS ; MAGNETIZATIONS ; DISSOLUTION ; OXIDATION ; SEDIMENTS ; ORIGINS |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000252470400013 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/69550]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Liu XiuMing |
| 作者单位 | 1.Lanzhou Univ, Minist Educ, Key Lab Western Chinas Environm Syst, Lanzhou 730000, Peoples R China 2.Macquarie Univ, Dept Phys Geog, N Ryde, NSW 2109, Australia 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 4.Chinese Acad Sci, Inst Cold & Arid Reg Environm & Engn, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China 5.Tech Univ Brno, Lab Palaeoecol, FT VUT Zlin, Zlin 76272, Czech Republic |
| 推荐引用方式 GB/T 7714 | Liu XiuMing,Liu TungSheng,Paul Hesse,et al. Two pedogenic models for paleoclimatic records of magnetic susceptibility from Chinese and Siberian loess[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2008,51(2):284-293. |
| APA | Liu XiuMing,Liu TungSheng,Paul Hesse,Xia DunSheng,Jiri Chlachula,&Wang Guan.(2008).Two pedogenic models for paleoclimatic records of magnetic susceptibility from Chinese and Siberian loess.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,51(2),284-293. |
| MLA | Liu XiuMing,et al."Two pedogenic models for paleoclimatic records of magnetic susceptibility from Chinese and Siberian loess".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 51.2(2008):284-293. |
入库方式： OAI收割
来源：地质与地球物理研究所
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