| 巴丹吉林典型高大沙山粒度分布规律研究 |
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| 引用本文： | 邵天杰,赵景波,李恩菊,董治宝.巴丹吉林典型高大沙山粒度分布规律研究[J].地理科学,2010,30(5):790-795. |
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| 作者姓名： | 邵天杰 赵景波 李恩菊 董治宝 |
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| 作者单位： | 1. 陕西师范大学旅游与环境学院, 陕西 西安 710062;2. 中国科学院地球环境研究所黄土与第四纪地质 国家重点实验室, 陕西 西安 710075;3. 中国科学院寒区旱区环境与工程研究所, 甘肃 兰州 730000 |
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| 基金项目： | 教育部"长江学者"特聘教授项目资助。 |
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| 摘 要： | 选巴丹吉林沙漠典型高大沙山(1 605 m)为研究对象,对沙山沉积物进行系统采样分析。结果表明,巴丹吉林沙漠典型高大沙山(1 605 m)粒度组成中细砂含量最高,中砂次之;粗砂、极细砂和粗粉砂含量均较少,胶粒、粘粒、细粉砂未出现。迎风坡沉积物粒度比背风坡细。迎风坡砂粒大小均匀、分选好,迎风坡沉积物颗粒较背风坡总体要均匀。沙山迎风坡和背风坡沉积物由坡脚至顶部粒径总体变细,砂粒大小趋于均匀,分选变好,偏度和峰态由波动趋于稳定。大沙山迎风坡下部侵蚀作用为主,背风坡中上部以风力堆积为主,下部以重力堆积为主。
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| 收稿时间： | 2010-01-10 |
| 修稿时间： | 2010-06-07 |
Grain Size Composition of Typical Mega-dune in Badain Jaran Desert |
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| SHAO Tian-jie,ZHAO Jing-bo,LI En-ju,DONG Zhi-bao.Grain Size Composition of Typical Mega-dune in Badain Jaran Desert[J].Scientia Geographica Sinica,2010,30(5):790-795. |
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| Authors: | SHAO Tian-jie ZHAO Jing-bo LI En-ju DONG Zhi-bao |
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| Institution: | 1. College of Tourism and Environment Science, Shaanxi Normal University; Xian, Saanxi 710062;2. State Key Laboratory of Loess and Quaternary Geology, Earth Environment Institute, Chinese Academy of Science, Xi’an, Saanxi 710075;3. Key Laboratory of Desert and Desertification, Chinese Academy of Sciences, Lanzhou, Gansu 730000 |
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| Abstract: | The paper selected the typical mega-dune (1605 m) in Badain Jaran Desert as the object of the study, and analyzed the sediment samples systematically. The results showed that the content of the fine sand was the highest, followed by the medium sand. The contents of the coarse sand, very fine sand and coarse silt were less, and the colloidal particle, clay and fine silt didn’t appear. The particle size of sediment on windward slope was smaller than that on leeward slope. The sand particle on windward slope was even-sized, well-separated. The sediment particle size became smaller, evener, better-separated, and the deviation and kurtosis more stable from the bottom to the top of the slope. The main function was erosion on bottom of windward slope, and the main function was accretion by wind action in middle and upper part and by gravity in bottom of leeward slope. |
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