| 巴丹吉林沙漠高大沙山沉积物地球化学元素组成及其环境意义 |
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| 引用本文： | 崔徐甲,孙虎,董治宝,李继彦,郜学敏,李超.巴丹吉林沙漠高大沙山沉积物地球化学元素组成及其环境意义[J].中国沙漠,2017,37(1):17-25. |
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| 作者姓名： | 崔徐甲 孙虎 董治宝 李继彦 郜学敏 李超 |
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| 作者单位： | 1. 陕西师范大学 旅游与环境学院, 陕西 西安 710062;2. 中国科学院寒区旱区环境与工程研究所 沙漠与沙漠化重点实验室, 甘肃 兰州 730000;3. 晋中学院 旅游管理学院, 山西 晋中 030600 |
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| 基金项目： | 国家科技支撑计划农村领域科技基础性工作专项（2012BAD16B0303）；中央高校基本科研业务费专项（GK201604011）；国家林业公益性行业科研专项（201304325） |
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| 摘 要： | 地球化学元素不仅反映地球表层沉积物的组成特征，并在分析物源、沉积过程及重建古环境等方面有积极意义。通过野外采样、室内实验，对巴丹吉林沙漠伊和吉格德湖、巴丹湖高大沙山区沉积物地球化学特征进行了分析。结果表明：沙山沉积物元素组成特征和含量略有区域差异；与上部陆壳平均化学组成（UCC）相比，常量元素中仅Si富集，其余均亏损；趋向迎风坡上部剖面，Si、K富集程度相对增加，其他常量元素（除Na）亏损程度增加。常量元素间的关系表明SiO2影响沙山沉积物的地球化学组成及性质；迎风坡底部剖面沉积物呈现出多源性特征，可能是不同外力作用的结果。两湖区沙山的沙源属局部范围混合的结果，就近供应；干旱气候下沙山沉积物缺少较高等化学风化产生的条件，基本处在大陆风化早期阶段的初期。
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| 关 键 词： | 地球化学元素 化学风化 高大沙山 巴丹吉林沙漠 |
| 收稿时间： | 2015-08-17 |
| 修稿时间： | 2015-09-24 |
Geochemical Elements Composition of Sediments for Mega-dunes and Its Environmental Significance in the Badain Jaran Sand Sea |
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| Cui Xujia,Sun Hu,Dong Zhibao,Li Jiyan,Gao Xuemin,Li Chao.Geochemical Elements Composition of Sediments for Mega-dunes and Its Environmental Significance in the Badain Jaran Sand Sea[J].Journal of Desert Research,2017,37(1):17-25. |
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| Authors: | Cui Xujia Sun Hu Dong Zhibao Li Jiyan Gao Xuemin Li Chao |
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| Institution: | 1. College of Tourism & Environment Sciences, Shaanxi Normal University, Xi'an 710062, China;2. Key Laboratory of Desert and Desertification, Cold and Arid Regions Environment and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;3. College of Tourism Management, Jinzhong University, Jinzhong 030600, Shanxi, China |
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| Abstract: | Geochemical elements not only reflect the composition characteristics of the earth's surface sediments, but also have positive significance in analysis of material source, sedimentary process, and reconstruction of paleo-environment. Through field investigation and laboratory experiment, this article analyzed the geochemical characteristics of sediments for mega-dunes in Yihejigede Lake and Badain Lake areas of Badain Jaran sand sea. The results showed that the sediment of mega-dunes had the similar composition characteristics and slightly regional differences in element content; Compared with UCC, only Si was enriched for major elements,others was loss; Trending to the upper section in the windward of mega-dune, the relative degree of enrichment for Si and K increased, but the degree of loss for other major element except Na increased; Relationship among major elements demonstrated that SiO2 played an important role in geochemical composition and properties for mega-dunes; Sediments in the bottom section of windward slope presented a characteristic of multiple material source, this may be affected by different exogenic action, meanwhile, the material source for the mega-dunes in the two lakes areas belonged to local supply as a result of mixture in local scope; The condition of drought climate make it impossible for sediment to get an advanced chemical weathering process, and they stayed in the initial stage of the early stage of continental weathering. |
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| Keywords: | geochemical elements chemical weathering mega-dunes Badain Jaran Sand Sea |
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