| 慕士塔格新冰期以来冰碛物风化成土特征 |
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| 引用本文： | 李亚兵,易朝路,魏灵,程功弼.慕士塔格新冰期以来冰碛物风化成土特征[J].冰川冻土,2006,28(3):355-359. |
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| 作者姓名： | 李亚兵 易朝路 魏灵 程功弼 |
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| 作者单位： | 1. 南京大学, 城市与资源学系, 江苏, 南京, 210093;2. 中国科学院, 青藏高原研究所, 北京, 100083 |
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| 基金项目： | 国家高技术研究发展计划(863计划)
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中国科学院重点实验室基金
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中国科学院"百人计划" |
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| 摘 要： | 对慕士塔格西坡冰碛物粒度及磁化率分析表明:<1 mm的冰碛物以4~6Φ (0.063~0.016mm)含量为主,平均粒径(Mean)在2~6Φ之间,分选系数(δ)在1~3之间,峰态系数(Kg)为1.5~3.5,偏度(SK)系数在-2~2之间;磁化率分别与时代较老的冰碛土的粘土,和时代较新的冰碛土的粗砂成正相关.土壤发育过程和风力作用是影响冰碛物演化的重要因素,原生冰碛物保留的平均深度在30 cm以下.
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| 关 键 词： | 冰碛物 粒度 磁化率 慕士塔格 |
| 文章编号： | 1000-0240(2006)03-0355-05 |
| 收稿时间： | 11 21 2005 12:00AM |
| 修稿时间： | 03 5 2006 12:00AM |
Grain-size Features and Magnetic Susceptibility Characteristic of the SurfaceLayer of the Moraines in the Muztag Ata |
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| LI Ya-bing,YI Chao-lu,WEI Ling,CHEN Gong-bi.Grain-size Features and Magnetic Susceptibility Characteristic of the SurfaceLayer of the Moraines in the Muztag Ata[J].Journal of Glaciology and Geocryology,2006,28(3):355-359. |
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| Authors: | LI Ya-bing YI Chao-lu WEI Ling CHEN Gong-bi |
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| Institution: | 1. Department of Urban and Resources sciences, Nanjing University, Nanjing Jiangsu 210093, China;2. Institute of Tibetan Plateau Research, Chinese Academy of Science, Beijing 100085, China |
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| Abstract: | Grain size and magnetic susceptibility of 116 samples from moraine soil on the west of the Mustag Ata over 4000 meters were analyzed.It is found that a main peak occurs at 4~6Φ in the grain size distribution curves,the mean grain-size ranges between 2Φ and 6Φ,the sort coefficient changes from 1 to 3,and the kurtosis coefficient changes from 1.5 to 3.5.Furthermore,the grain size properties are strongly correlated with the magnetic susceptibility.The grain size characteristics are different with altitude,location and depth of the moraine soil.It is concluded that the grain-size and the magnetic susceptibility of moraine soil on the Mustag Ata are mainly controlled by the soil development, wind and the dry and cold climate under the westerlies.The original moraines lie at 30~55 cm deep below the surface. |
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| Keywords: | moraine soil grain size magnetic susceptibility Muztag Ata |
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