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中国沙漠 ›› 2025, Vol. 45 ›› Issue (5): 155-160.DOI: 10.7522/j.issn.1000-694X.2025.00007

• • 上一篇    

巴丹吉林沙漠外围戈壁沉积物粒度特征及沉积环境

刘军(), 王海兵(), 左合君, 张雪, 廖承贤   

  1. 内蒙古农业大学 沙漠治理学院/内蒙古自治区风沙物理与防沙治沙工程重点实验室/荒漠生态系统保护与修复国家林业和草原局重点实验室,内蒙古 呼和浩特 010011
  • 收稿日期:2024-10-30 修回日期:2025-02-13 出版日期:2025-09-20 发布日期:2025-09-27
  • 通讯作者: 王海兵
  • 作者简介:刘军(1984—),男,内蒙古包头人,博士研究生,高级实验师,主要从事荒漠化防治研究。E-mail: 314026272@qq.com
  • 基金资助:
    国家自然科学基金项目(42261002);内蒙古农业大学实验教学仪器设备研制与标本制作项目(YZ2024013)

Sediment grain size characteristics and sedimentary environment of the gobi in periphery of the Badain Jaran Desert

Jun Liu(), Haibing Wang(), Hejun Zuo, Xue Zhang, Chengxian Liao   

  1. College of Desert Control Science and Engineering / Key Laboratory of Aeolian Sand Physics and Sand Control Engineering in Inner Mongolia / Key Laboratory of Desert Ecosystem Conservation and Restoration,Inner Mongolia Agricultural University,Hohhot 010011,China
  • Received:2024-10-30 Revised:2025-02-13 Online:2025-09-20 Published:2025-09-27
  • Contact: Haibing Wang

摘要:

为研究巴丹吉林沙漠外围不同戈壁类型沉积物粒度特征及其沉积环境,依据2023年8月环绕该沙漠采集的41个戈壁样点表层与下伏层沉积物样品,在粒度测量与戈壁类型划分基础上,分析不同戈壁类型沉积物粒度特征,并揭示其沉积环境。结果表明:剖面上,各戈壁沉积物分选性均很差,粒度呈多峰态。自粗砾质过渡为细粒质戈壁,表层沉积物中砾石比例降低、沙比例升高,粉砂+黏土比例呈先降低后升高趋势;剖面上,表层粉砂+黏土比例表层低于下伏层,砾石比例与沙比例表层高于下伏层。各戈壁下伏层沉积物形成于河流沉积和洪积沉积环境,中砾质戈壁和细砾质戈壁表层沉积物有风成沉积特点。研究结果可为该区域戈壁生态环境建设以及防沙治沙提供基础数据。

关键词: 粒度, 沉积环境, 戈壁, 巴丹吉林沙漠

Abstract:

To study the sediments grain size characteristics and sedimentary environment of different gobi types at the periphery of Badain Jaran Desert, this paper analyzed the grain size characteristics of sediments and sedimentary environment from different gobi types based on the grain size measurements and the classification of Gobi types, the surface layer and underlying layer sediment samples were collected around the desert at August 2023 year in 41 gobi sample sites. The results show that: on the profile, the sediments of each gobi are poorly sorted, and the grain sizes are in a multimodal state. since the transition from coarse gravelly gobi to fine-grained gobi, the proportion of gravel in the surface sediment decreases, the proportion of sand increases, and the proportion of silt+clay shows a trend of decreasing and then increasing; on the profile, the proportion of silt+clay in the surface layer is lower than that in the underlying layer, and the proportion of gravel and sand is higher in the surface layer than that in the underlying layer. The sediments in the underlying layers of each gobi were formed in alluvial and fluvial depositional environments, and the surface sediments of the medium-gravelly gobi and fine-gravelly gobi are characterized by aeolian deposition. The results provide basic data for the gobi regional ecological environment construction and desertification control.

Key words: grain size, sedimentary environment, gobi, Badain Jaran Desert

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