毛乌素沙地西南缘灌丛沙丘沉积物的粒度和元素特征

刘海霞; 李晋昌; 苏志珠; 杜自强; 高婧

doi:10.7522/j.issn.1000-694X.2014.00058

中国沙漠 >

2015 , Vol. 35 >Issue 1: 24 - 31

DOI: https://doi.org/10.7522/j.issn.1000-694X.2014.00058

中国地理学会沙漠分会2014年学术研讨会论文选

毛乌素沙地西南缘灌丛沙丘沉积物的粒度和元素特征

刘海霞 ,
李晋昌 ,
苏志珠 ,
杜自强 ,
高婧

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1. 山西大学黄土高原研究所, 山西太原 030006;
2. 山西大学历史文化学院, 山西太原 030006

刘海霞(1989-),女,山西大同人,硕士研究生,主要从事区域生态学研究.Email: liuhaixia140223@163.com

收稿日期: 2014-04-21

修回日期: 2014-06-06

网络出版日期: 2015-01-20

基金资助

中国科学院沙漠与沙漠化重点实验室开放基金项目(KLDD-2014-001);国家自然科学基金项目(41330748,41101013,41161066);山西省科技重大专项(20121101011)

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The Characteristics of Grain Size and Chemical Elements of the Nebkha Sediments in the Southwestern Margin of the Mu Us Sandy Land

Liu Haixia ,
LI Jinchang ,
Su Zhizhu ,
Du Ziqiang ,
Gao Jing

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1. Institute of Loess Plateau, Shanxi University, Taiyuan 030006, China;
2. Historical Culture School, Shanxi University, Taiyuan 030006, China

Received date: 2014-04-21

Revised date: 2014-06-06

Online published: 2015-01-20

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摘要

对毛乌素沙地白刺(Nitraria tangutorum)灌丛沙丘沉积物粒度和元素特征进行了采样分析.结果表明:灌丛沙丘沉积物来源单一,几乎全部由丘间地物质组成,其粒度和元素特征与丘间地物质极其相似;相对而言,灌丛沙丘沉积物比丘间地物质含有更多粗颗粒物,主要因丘间地可做跃移运动的中沙和细沙更易被灌丛阻挡而堆积;灌丛沙丘沉积物中大部分元素含量比丘间地物质低,主要因这些元素易被淋溶迁移到丘间地富集;灌丛沙丘发育以来,虽然其沉积环境存在波动,但相对稳定,未发生过显著变化.

关键词： 灌丛沙丘; 丘间地; 跃移运动; 淋溶迁移; 沉积环境

本文引用格式

刘海霞 , 李晋昌 , 苏志珠 , 杜自强 , 高婧 . 毛乌素沙地西南缘灌丛沙丘沉积物的粒度和元素特征[J]. 中国沙漠, 2015 , 35(1) : 24 -31 . DOI: 10.7522/j.issn.1000-694X.2014.00058

Abstract

The characteristics of grain size and chemical elements of the Nitraria tangutorum nebkha sediments in the Mu Us Sandy Land have been analyzed. The results show that the nebkha sediments almost all come from the surface soils at the interdune, and its characteristics of grain size and chemical elements are extremely similar to that of the surface soils at the interdune. Comparatively, the nebkha sediments contain more coarse particles than the surface soils at the interdune, which is mainly because the medium sand and fine sand that can be transported by saltation easily are intercepted by nebkha and then accumulate. The contents of most chemical elements are lower in the nebkha sediments than in the surface soils at the interdune, which is mainly because the elements easily enrich in the surface soil at the interdune due to the leaching and movement. Since the development of the nebkha, the sedimentary environment of the nebkha has fluctuated but relatively been stable with few significant changes.

Key words： nebkha; interdune; saltation; leaching and movement; sedimentary environment

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