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| Grain Size Distribution of the Parabolic Dunes’ Sediments in the Ebinur Lake Basin, Xinjiang, China |
| Ma Qian1,2, Wu Shengli1,2, Liu Yongquan2, Jia Chunrong2 |
1. Xinjiang Laboratory of Lake Environment and Resources in Arid Zone, Xinjiang Normal University, Urumqi 830054, China;
2. College of Geography and Tourism, Xinjiang Normal University, Urumqi 830054, China |
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Abstract Based on experiment analysis of the surface sediments samples of the parabolic dunes in the Ebinur Lake Basin, the grain size of the sand dunes was between 0.4 μm and 2116.5 μm. The main components of the dunes sediments were sand, and it also contained a certain amount of fine gravel and clay. The average grain size gradually became coarser from the inter-dune to dune crest, and then became finer until lee slope toe. The sorting were overall poor, the smaller the average particle diameter was, the better sorted. Frequency curve of grain size were mixed of positive bias, the basic symmetry, negative bias and extreme negative bias. The grain size and sorting coefficient showed no significant negative correlation, the grain size and kurtosis coefficient showed a significant negative correlation, while sorting coefficient and kurtosis coefficient showed a significant positive correlation. The grain size, sorting coefficient and frequency curve of the different parts of dune landform sediments showed a regular change, which was the result affected by airflow, dunes morphology, vegetation cover and sediments character. The parabolic dunes sediments of the Ebinur Lake Basin were supplied by two or more sources.
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Received: 27 May 2013
Published: 20 May 2014
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Corresponding Authors:
武胜利（Email：wushengli77@126.com）
E-mail: wushengli77@126.com
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2014, Vol. 34 
