| Grain size characteristics in the Hexi Corridor Desert | |
| Zhang, Zhengcai; Dong, Zhibao | |
| 刊名 | AEOLIAN RESEARCH
 |
| 2015-09-01 | |
| 卷号 | 18页码:55-67 |
| 关键词 | Grain size Dune Hexi Corridor Desert Deposition environment |
| ISSN号 | 1875-9637 |
| DOI | 10.1016/j.aeolia.2015.05.006 |
| 通讯作者 | Zhang, Zhengcai(zhangzhsi@sina.com) |
| 英文摘要 | This study investigates grain-size characteristics on the dune surfaces in the Hexi Corridor Desert, a little-researched area of northwestern China. Grain-size parameters (mean, standard deviation, skew, and kurtosis) were determined on dune surfaces at the windward toe, stoss, crest, and leeward toe. Multiple discriminant analyses were applied to distinguish deposition environments. Results indicated that the aeolian sediment in the Hexi Corridor Desert is mainly composed of very fine and fine sand (0.07 mm +/- 0.01 to 0.24 mm +/- 0.06). Sorting improves as grain size becomes finer. However, mean grain size increased with skew, but decreased with kurtosis. There is a good negative correlation between skew and sorting. However, there is no correlations between sorting and skew, and skew and kurtosis. The sediment deposition environment includes aeolian, lacustrine and alluvial sediments. The lacustrine sediment provides the source material for the formation and development of dune windward toes and stoss, but the aeolian sediment provides the source material for the formation and development of dune crest and leeward toes. Based on log-probability of grain size distributions, aeolian sediments in dune networks are composed of two distinct saltation populations. Sand sources affect the mean grain size changed from upwind to downwind, medium sand decreases and fine sand, very fine sand, and silt and clay increase, sand sediment become finer from upwind to downwind. There are three types of mean sand grain sizes over dune surface: coarser crest (69%), finer crest (24%), or no difference (7%) with windward slope and leeward slope. (C) 2015 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | PARTICLE-SIZE ; LINEAR DUNES ; BLOWN SAND ; CHINA ; KALAHARI ; TRANSPORT ; BASIN |
| WOS研究方向 | Physical Geography |
| WOS类目 | Geography, Physical |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCI LTD |
| WOS记录号 | WOS:000362134800006 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2557012 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Zhang, Zhengcai |
| 作者单位 | Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Key Lab Desert & Desertificat, Lanzhou 730000, Gansu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Zhengcai,Dong, Zhibao. Grain size characteristics in the Hexi Corridor Desert[J]. AEOLIAN RESEARCH,2015,18:55-67. |
| APA | Zhang, Zhengcai,&Dong, Zhibao.(2015).Grain size characteristics in the Hexi Corridor Desert.AEOLIAN RESEARCH,18,55-67. |
| MLA | Zhang, Zhengcai,et al."Grain size characteristics in the Hexi Corridor Desert".AEOLIAN RESEARCH 18(2015):55-67. |
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