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| DOI | 10.1029/2009JB007184 |
| A rock magnetic study of loess from the West Kunlun Mountains | |
| Zan, Jinbo; Fang, Xiaomin; Yang, Shengli; Nie, Junsheng; Li, Xiangyu | |
| 通讯作者 | Zan, JB (通讯作者) |
| 发表日期 | 2010 |
| ISSN | 2169-9313 |
| EISSN | 2169-9356 |
| 卷号 | 115 |
| 英文摘要 | West Kunlun Mountains have continuous loess deposits. However, very few papers have explored the rock magnetic characteristics of loess deposited there. Thus, although Kunlun Mountains loess is one of the useful paleoclimate archives, its importance has not been emphasized. Here we present detailed rock magnetic and bulk grain-size studies on a 207 m loess core on the northern slope of the West Kunlun Mountains. We find that magnetic susceptibility of loess from the northern slope of the West Kunlun Mountains is not controlled by changes in the concentration of ultrafine pedogenic magnetite and maghemite, but instead controlled by changes in the concentration of aeolian multidomain magnetite and maghemite. This is unsurprising given the low rainfall of the Kunlun region and the lack of postdepositional weathering and soil formation in these aeolian sequences. In addition, we find that magnetic susceptibility values increase dramatically at 111 m corresponding to an age of similar to 0.5 Ma. The magnetic susceptibility increase is accompanied by coarsening of both bulk and magnetic grain size and softening of magnetic mineralogy. We tentatively tie these changes in rock magnetic and grain-size parameter records to an expansion of desert environment. |
| 关键词 | CHINESE LOESSGRAIN-SIZEPALEOSOL SEQUENCESTIBETAN PLATEAURECORDUPLIFTPALEOCLIMATEEVOLUTIONDESERT |
| 语种 | 英语 |
| WOS研究方向 | Geochemistry & Geophysics |
| WOS类目 | Geochemistry & Geophysics |
| WOS记录号 | WOS:000283095100002 |
| 来源期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
 |
| 来源机构 | 中国科学院青藏高原研究所 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/257825 |
| 推荐引用方式 GB/T 7714 | Zan, Jinbo,Fang, Xiaomin,Yang, Shengli,et al. A rock magnetic study of loess from the West Kunlun Mountains[J]. 中国科学院青藏高原研究所,2010,115. |
| APA | Zan, Jinbo,Fang, Xiaomin,Yang, Shengli,Nie, Junsheng,&Li, Xiangyu.(2010).A rock magnetic study of loess from the West Kunlun Mountains.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,115. |
| MLA | Zan, Jinbo,et al."A rock magnetic study of loess from the West Kunlun Mountains".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 115(2010). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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