The physicochemical characteristics of aeolian sediments in sand dunes surface is one of the important issue in aeolian geomorphology. The 38 surface sediment samplers had been selected from the crescent-shaped sand dunes, vegetable dunes and lacustrine sediments at the gobi surface in the middle desert of the Hexi Corridor. The physical properties (average particle size, sorting degree, kurtosis, skewness) and chemical properties (major and trace elements) of these sediment samples were analyzed. The results showed that the surface sediments of crescent dunes in Hexi Corridor are mainly of medium sand (21.65%-57.39%), followed by fine sand(23.22%-52.96%). The averaged particle size is 0.27~0.43 mm and larger than other deserts. The sediments from dunes are moderately well sorted and with a near symmetry and mesokurtic distribution. The major elements are mainly Cao and SiO2, 5.55% and 66.12%, respectively. The content of trace elements is similar in the same dune, but the contents are different for different dunes.
Pan Kaijia
,
Zhang Zhengcai
,
Dong Zhibao
,
Zhang Caixia
,
Li Xingcai
. Physicochemical Characteristics of Surface Sediments of Crescent-shaped Sand Dunes in the Hexi Corridor, Gansu, China[J]. Journal of Desert Research, 2019
, 39(1)
: 44
-51
.
DOI: 10.7522/j.issn.1000-694X.2018.00150
[1] 钱广强,董治宝,罗万银,等.巴丹吉林沙漠地表沉积物粒度特征及区域研究[J].中国沙漠,2011,32(6):1358-1363.
[2] 哈斯,王贵勇.腾格里东南缘横向沙丘粒度变化及其与坡面形态的关系[J].中国沙漠,1996,16(2):216-221.
[3] 董治宝,苏志珠,钱广强,等.库姆塔格沙漠风沙地貌[M].北京:科学出版社,2011.
[4] Lancaster N.Star dunes[J].Progress of Physical Geography,1989,13:67-92.
[5] Wang X M,Dong Z B,Zhang J W,et al.Grain size characteristics of dune sand in the central Taklimakan Sand Sea[J].Sedimentary Geology,2003,16:1-14.
[6] Lancaster N.Geomorphology of Desert Dunes[M].New York,USA:Routledge,1995.
[7] Lancaster N.Grain size characteristics of Namib Desert linear dunes[J].Sedimentology,1981,28:115-122.
[8] 朗丽丽,王训明,朱秉启,等.河西走廊西端灌丛沙丘发育过程及其对沙漠化的指示意义[J].中国沙漠,2017,37(4):612-619.
[9] Zhang Z C,Dong Z B.Grain size characteristics in the Hexi Corridor Desert[J].Aeolian Research,2015,18:55-67.
[10] Zhang Z C,Dong Z B,Hu G Y,et al.Migration and morphology of asymmetric barchans in the Central Hexi Corridor of Northwest China[J].Geosciences,2018,8(6):204.
[11] Zhang H C,Ma Y Z,Peng J L,et al.Palaeolake and palaeoenvironment between 42 and 18 ka BP in Tengger Desert,NW China[J].China Science Bulliten,2002,47:1946-1956.
[12] Guan Q Y,Pan B T,Li N,et al.Timing and significance of the initiation of present day deserts in the northeastern Hexi Corridor,China[J].Palaeogeography,Palaeoclimatology,Palaeoecology,2011,306:70-74.
[13] 吴正.风沙地貌与治沙工程学[M].北京:科学出版社,2003:448.
[14] 俞胜清,阿布都米基提,周向玲,等.新疆喀拉库姆沙漠新月形沙丘不同部位粒度特征[J].中国沙漠,2013,33(6):1629-1635.
[15] Zou X Y,Li J F,Liu B,et al.The protective effects of nebkhas on an oasis[J].Aeolian Research,2016,20:71-79.
[16] Khalaf F I,Misak R,Al-dousari A.Sedimentological and morphological characteristics of some nabkha deposits in the northern coastal plain of Kuwait,Arabia[J].Journal of Arid Environments,1995,29(3):267-292.
[17] Langford R P.Nabkha (coppice dune) fields of south-central New Mexico,USA[J].Journal of Arid Environments,2000,46(1):25-41.
[18] Visher G.Grain size distributions and depositional processes[J].Journal of Sedimentary Research,1969,39(3):1074-1106.
[19] 陈渭南.塔克拉玛干沙漠84°E沿线沙物质的粒度特征[J].地理学报,1993,48(1):33-46.
[20] 朱秉启,杨小平.塔克拉玛干沙漠沉积物的粒度沉积学特征及其意义[C]//2007年全国地貌与第四纪学术研讨会论文集,2007.
[21] 魏怀东,王继和,徐先英,等.库姆塔格沙漠各沙丘类型沙粒粒度分析[J].甘肃科技,2007,23(5):85-88.
[22] 哈斯,王贵勇.沙坡头地区新月形沙丘粒度特征[J].中国沙漠,2001,21(3):271-275.
[23] 李恩菊.巴丹吉林沙漠与腾格里沙漠沉积物特征的对比研究[D].西安:陕西师范大学,2011.
