[1]邵天杰,赵景波,董治宝,等.巴丹吉林沙漠沙山粒度组成与沙山地貌分带[J].山地学报,2013,(04):434.
　SHAO Tianjie,ZHAO Jingbo,DONG Zhibao.Particle Size Composition and Geomorphology Zoning of the Megadune in the Badain Jaran Desert[J].Mountain Research,2013,(04):434.
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巴丹吉林沙漠沙山粒度组成与沙山地貌分带()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2013年04期
页码:
434
栏目:
山地环境
出版日期:
2013-01-01

文章信息/Info

Title:
Particle Size Composition and Geomorphology Zoning of the Megadune in the Badain Jaran Desert
作者:
邵天杰;赵景波;董治宝;
陕西师范大学旅游与环境学院,陕西 西安 710062
Author(s):
SHAO Tianjie;  ZHAO Jingbo;  DONG Zhibao
College of Tourism and Environment Science, Shaanxi Normal University, Xi`an 710062,China
关键词:
沙山形成; 地貌分带; 粒度成分; 巴丹吉林沙漠
Keywords:
megadunes formed;  geomorphology zoning;  particle size composition;  Badain Jaran Desert
分类号:
P931.3
文献标志码:
A
摘要:
为查明巴丹吉林沙漠东南部沙山的成因与发育机制,在沙山密集分布的中心地区选择典型高大沙山作为研究对象,将单个沙山的物质组成与地貌分带相结合进行系统、定量的研究。通过粒度分析获得了沙山不同剖面、不同部位沉积物的粒度组成和各粒级含量的变化等数据,并进一步探讨了粒度组成和含量变化与沙山地貌分带、形成风动力条件之间的相互关系。得出以下主要结论:1.巴丹吉林沙漠沙山粒度组成为粗粉砂、极细砂、细砂、中砂、粗砂。其中细砂含量最高,中砂、粗砂次之,极细砂和粗粉砂含量均较少。2.沙山迎风坡表层沉积物的粒度比迎风坡下层和背风坡表层要粗,其搬运介质的平均动能也最大。3.从沙山坡脚到坡顶粒度组成均呈现由粗变细的趋势,这...
Abstract:
In order to find out the formation and developmental mechanism of megadune, an emblematic megadune in the densely distributed central area in the southeastern Badain Jaran Desert was chosen as the study object.Using a combination of the material composition and physiognomy zonations of a single megadune to research the formations of megadune systematically and quantificationally. Method of particle size analysis was used to obtain the data of physiognomy zonations at the windward slope, sediment size composition at the different parts of megadune. According to these data, further discuss the relationship between sediment size composition and landform zoning characteristics of megadune windward slope and wind dynamic conditions at different parts of megadune. Some results were drawn as follows:1 the particle size of megadune was comprised by coarse silt, very fine sand, fine sand, medium sand and coarse sand. The content of the fine sand was the highest，followed by the medium sand and coarse sand, the very fine sand and coarse silt were less. 2 The particle size of sediment on surface layer of windward slope was thicker than that on sublayer of windward slope and surface layer of leeward slope, and its average kinetic energy of transportation medium also was maximal. 3 The sediment particle size became smaller from the bottom to the top of the slope, which was caused by the differences of forming prpcess and dynamic effect. 4 According to the observational data of secondary physiognomy, the windward slope of megadune was divided into lowlying sandy depression zones, sparse simple barchans or barchanoid chains zoning, dense barchans and barchanoid chains zoning and steep main peak zoning from the bottom up. 5 That aeolian sand material was not carried to the middle and upper part of megadune one time, but carried to the upper part of megadune by numerousness windforce transport. Firstly, medium sand and fine sand in the lower of megadune was carried to the middle part, and shaped barchan and barchanoid chains. After repeatedly transport, finally the peak of megadune was shaped.

备注/Memo

备注/Memo:
收稿日期(Received date)：2012-10-10；改回日期(Accepted)：2013-01-24。
基金项目(Foundation item)：中央高校基本科研业务费专项资金资助(GK201302033)、中国干旱地区苦咸水调查(2008FY210300)、教育部长江学者特聘教授项目(801313)资助。[Supported by the Fundamental Research Funds for the Central Universities,No.GK201302033;Investigation on Brackish Water in Arid Regions of China,No.2008FY210300;Yangtze River Scholar Bonus Schemes of China.No.801813.]
作者简介（Biography）：邵天杰(1982-)，男，安徽淮北人，博士，主要从事区域环境学研究。[Shao Tianjie (1982-),Doctor, specialized in regional environment in arid regions.]E-mail:tjshao2010@126.com
更新日期/Last Update: 1900-01-01