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| The Characteristics of Grain Size and Chemical Elements of the Nebkha Sediments in the Southwestern Margin of the Mu Us Sandy Land |
| Liu Haixia1, LI Jinchang1, Su Zhizhu2, Du Ziqiang1, Gao Jing1 |
1. Institute of Loess Plateau, Shanxi University, Taiyuan 030006, China;
2. Historical Culture School, Shanxi University, Taiyuan 030006, China |
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Abstract The characteristics of grain size and chemical elements of the Nitraria tangutorum nebkha sediments in the Mu Us Sandy Land have been analyzed. The results show that the nebkha sediments almost all come from the surface soils at the interdune, and its characteristics of grain size and chemical elements are extremely similar to that of the surface soils at the interdune. Comparatively, the nebkha sediments contain more coarse particles than the surface soils at the interdune, which is mainly because the medium sand and fine sand that can be transported by saltation easily are intercepted by nebkha and then accumulate. The contents of most chemical elements are lower in the nebkha sediments than in the surface soils at the interdune, which is mainly because the elements easily enrich in the surface soil at the interdune due to the leaching and movement. Since the development of the nebkha, the sedimentary environment of the nebkha has fluctuated but relatively been stable with few significant changes.
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Received: 21 April 2014
Published: 20 January 2015
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2015, Vol. 35 
