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中国沙漠 ›› 1995, Vol. 15 ›› Issue (4): 323-331.

• 论文 • 上一篇    下一篇

浑善达克沙地全新世沉积特征与环境演变

李森1, 孙武2, 李孝泽1, 张勃3   

  1. 1. 中国科学院兰州沙漠研究所, 兰州 730000;
    2. 华南师范大学地理系, 广州 510631;
    3. 西北师范大学地理系, 兰州 730070
  • 收稿日期:1995-02-27 修回日期:1995-08-18 出版日期:1995-12-20 发布日期:1995-12-20
  • 基金资助:
    国家自然科学基金重大项目(9389009-Ⅱ)子课题和中科院兰州沙漠所所长基金资助项目

SEDIMENTARY CHARACTERISTICS AND ENVIRONMENTAL EVOLUTION OF OTINDAG SANDY LAND IN HOLOCENE

Li Sen1, Sun Wu2, Li Xiaoze1, Zhang Bo3   

  1. 1. Institute of Desert Research, Chinese Academy of Sciences, Lanzhou, 730000;
    2. Department of Geography, South China Normal University, Guangzhou, 510631;
    3. Departmenl of geograply, Noruwest Normal Universily, Lmzhau, 730070
  • Received:1995-02-27 Revised:1995-08-18 Online:1995-12-20 Published:1995-12-20

摘要: 浑善达克沙地全新世沉积主要有风成砂-古土壤和河湖相-古土壤-风成砂沉积序列,其中保存了大量粒度,化学元素,孢粉及披毛犀化石等环境变化证据。据此可把全新世气候划分为8个旋迥,经历了升温波动期(10~7.1ka B.P.)、温暖期(7.1~3.2ka B. P. )和温干冷干频繁波动期(3.2ka B. P. 至今)三个演变阶段。

关键词: 全新世, 砂质古土壤, 气候旋迥, 环境演变过程

Abstract: Holocene deposits of Otingdag Sandy Land mainly consist of aeolian sand-paleosol and fluvial-lacustrine-paleosol-aeolian sand sequence. There are a lot of evidences of environmental variations existed in it, including grain size variation,chemical element composition, pollen-spore assemblage and rhinoceros fossil etc..Besed on these evidences the climate of Holocene can be divided into eight cycles and three evolutional stages, namely temperature-rising fluctuation period(10~7.1ka B.P.),warm period(7.1~3. 2 ka B.P.) and warm-dry and cool-dry fluctuation period(3.2 ka B.P.~present).

Key words: Holocene, Sandy paleosol, Climatic cycle, Environmental evolution