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中国沙漠 ›› 2001, Vol. 21 ›› Issue (4): 346-353.

• 研究论文 • 上一篇    下一篇

“河套东南角理想剖面”的新近研究

李保生1,2, 靳鹤龄3, 祝一志2, 张宇红1, 董光荣3, 孙冬怀4, 邵亚军3, 孙武1, 张甲珅5, 阎满存6, 高全洲7   

  1. 1. 华南师范大学地理系, 广东广州 510631;
    2. 中国科学院地球环境研究所黄土与第四纪地质国家重点实验室, 陕西西安 710061;
    3. 中国科学院寒区旱区环境与工程研究所, 甘肃兰州 730000;
    4. 中国科学院南海海洋研究所, 广东广州 510301;
    5. 中国科学院地理科学与资源研究所, 北京 100101;
    6. 清华大学水利水电工程系, 北京 100084;
    7. 中山大学地理系, 广东广州 510275
  • 收稿日期:2001-03-18 修回日期:2001-05-25 出版日期:2001-12-20 发布日期:2001-12-20
  • 作者简介:李保生(1951-),男(汉族),河北邯郸人,理学博士,教授,多年来从事中国沙区环境及其演变研究。
  • 基金资助:

    国家自然科学基金项目(49971009);中科院地球环境研究所黄土与第四纪地质国家重点实验室项目(SKLLQG0008);国家重点基础研究发展规划项目(G2000048700)资助

Recent Study on the "Ideal Section in the Southeast Corner of Ordos"

LI Bao-sheng1,2, JIN He-ling3, ZHU Yi-zhi2, ZHANG Yuhong1, DONG Guang-rong3, SUN Dong-huai4, SHAO Ya-jun3, SUN Wu1, ZHANG Jia-shen5, YAN Mun-cun6, GAO Quan-zhou7   

  1. 1. Department of Geography, South China Normal University, Guangzhou 510631, China;
    2. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China;
    3. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
    4. South China Sea Research Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;
    5. Geography Research Institute, Chinese Academy of Sciences, Beijing 100101, China;
    6. Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China;
    7. Department of Geography, Zhongshan University, Guangzhou 510275, China
  • Received:2001-03-18 Revised:2001-05-25 Online:2001-12-20 Published:2001-12-20

摘要:

以在萨拉乌苏河流域近年命名的"米浪沟湾地层剖面"作为河套东南的理想剖面,描述了其地层特征、讨论了地层磁化率值和粒度分布与气候变迁的关系。研究指出,该剖面记录了150kaBP以来毛乌素沙漠27个旋回的砂丘与河湖相和古土壤互为交替的演化历史;剖面风成砂丘的堆积时期和河湖相或古土壤发育时期分别主要与过去冬季风和夏季风作用加强有关。根据中国沙漠及黄土区现代沙尘暴发生的区域特征认为,米浪沟湾剖面记录的150ka来的27次砂丘期代表了中国沙区存在27个沙漠堆积时期。

关键词: 米浪沟湾, 地层剖面, 150ka, 27个时期的风成砂丘堆积, 中国沙漠环境变迁

Abstract:

Taking "Milanggouwan section" located in the Salawusu River valley termed in recent years as an ideal profile in the southeastern margin of Ordos Plateau, the stratigraphic characteristics in the section and the relation between the stratigraphical magnetic susceptibility values, grain-size distributions and climatic changes have been discussed in this paper. It is pointed by studies out that the section takes down 27 cycles of alternately evolutionary histories of desert depositions in the Mu Us Desert with the fluvio-lacustrine facies and palaeosols since 150 ka BP and that the sedimentary periods of the aeolian dune and fluvio-lacustrine facies or palaeosol are chiefly apart related to intensifying winter monsoon and summer monsoon. Based on the regional feature that the contemporary sand-dust storm take place, it is considered that the 27 periods of dune accumulations recorded in Milanggouwan section represent 27 periods of desert deposition in China in past 150 ka.

Key words: Milanggouwan, stratigraphical section, past 150 ka, 27 periods of aeolian dunes, desert environmental vicissitude of China

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