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JOURNAL OF DESERT RESEARCH  2013, Vol. 33 Issue (3): 682-687    DOI: 10.7522/j.issn.1000-694X.2013.00098
Paleoclimate and Environment Evolution     
Grain-size Distribution and its Significance in Liaowadian Profile in the Upper Hanjiang River Valley, China
YANG Jian-chao, PANG Jiang-li, HUANG Chun-chang, ZHA Xiao-chun, WU Shuai-hu
College of Tourism and Environment, Shaanxi Normal University, Xi’an 710062, China
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Abstract  

The Liaowadian profile in the first level river terraces of the upper Hanjiang River valley was surveyed in detail, and then sampled systematically. Profile structure was observed in the field. Grain size distribution was analyzed in laboratory and compared with aeolian deposit in the Weihe River valley. An integration of the results shows that the loess and paleosol (S0) in the LWD profile were composed mainly of coarse silt (10-50 μm), and the loess and paleosol (S0) fall in the same area in the grain frequency curves, grain triangular diagram and grain parameter structure scatter diagram. It suggests that loess and paleosol (S0) have the same material source, but different from those of the slackwater deposits (SWD). They are the same as the Holocene loess-paleosol sequences in the Weihe River valley in stratigraphic structure, macroscopic characteristics and grain-size distribution. It indicates that the loess and paleosol (S0) from the LWD profile have aeolian features. Average loess grain size of the LWD profile is more finer than those in the Weihe River valley because dust storm activity decreased after it across the Qinling Mountains.

Key words:  grain-size      loess      Liaowadian      the upper Hanjiang River valley     
Received:  18 April 2012      Published:  23 May 2012
ZTFLH:  P531  

Cite this article: 

YANG Jian-chao, PANG Jiang-li, HUANG Chun-chang, ZHA Xiao-chun, WU Shuai-hu. Grain-size Distribution and its Significance in Liaowadian Profile in the Upper Hanjiang River Valley, China. JOURNAL OF DESERT RESEARCH, 2013, 33(3): 682-687.

URL: 

http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2013.00098     OR     http://www.desert.ac.cn/EN/Y2013/V33/I3/682

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