| 新疆伊犁黄土磁化率增强机制差异性分析 |
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| 关键词:Ili Loess magnetic susceptibility grain size Central Asia enhancement mechanism |
| 基金项目:国家重点基础研究规划项目(编号: 2010CB833406); 国家自然科学基金(编号: 40972230, 40772116); 黄土与第四纪地质国家重点实验室自主部署课题(编号: LQ0701) |
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| 摘要: |
| Differences in Magnetic Susceptibility Enhancement in Ili Loess, Xinjiang |
| In this paper, the authors have analyzed loess magnetic susceptibility and grain sizes along the Zhaosu section in Ili basin of Xinjiang dominated by the westerlies, and discussed the differences in the enhancement mechanism of magnetic susceptibility of the Ili loess. Studies show that although the content of fine clay is higher in the Ili loess than that in the loess plateau, the contribution of fine components to the loess magnetic susceptibility is very limited, suggesting that the magnetic carriers in the study area exist mainly in the coarse components. The authors hold that the mechanism of susceptibility formation in the Ili loess can be interpreted as either Alaska wind model or pedogenesis model of the Chinese Loess Plateau. However, the two models make different contributions to the loess magnetic susceptibility in different regions of the Ili basin, and even make different contributions to the enhancement of magnetic susceptibility in different periods of the same section, i.e., the enhancement mechanism of magnetic susceptibility in the Ili loess has spatial-temporal differences due to the influence of various factors, such as climate, topography, source mineral components and sedimentary environment. |
| LI Chuan-xiang,SONG You-gui.2011.Differences in Magnetic Susceptibility Enhancement in Ili Loess, Xinjiang[J].Acta Geoscientica Sinica,32(1):80-86. |
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