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中国沙漠 ›› 2002, Vol. 22 ›› Issue (2): 159-165.

• 研究论文 • 上一篇    下一篇

花海湖泊全新世古风成砂的发现及其古环境解释

胡刚1, 王乃昂1,2, 高顺尉1, 李巧玲1, 赵强1, 郭剑英1   

  1. 1. 兰州大学 资源环境学院, 甘肃 兰州 730000;
    2. 中国科学院 寒区旱区环境与工程研究所, 甘肃 兰州 730000
  • 收稿日期:2001-03-15 修回日期:2001-06-08 出版日期:2002-04-20 发布日期:2002-04-20
  • 作者简介:胡刚(1976-),男(汉族),山东滨州人,硕士研究生,主要从事环境变迁与区域开发研究。E-mail:hug2008@Yahoo.com.cn
  • 基金资助:
    中科院知识创新工程重大项目"西部生态环境演变规律与水土资源可持续利用研究"(KZCX1-10-02);国家自然科学基金项目(40071031);国家重点基础研究规划项目(G2000048701)联合资助

Discovery of Holocene Aeolian Sand in Huahai Lake and its Environmental Significance

HU Gang1, WANG Nai-ang1,2, GAO Shun-wei1, LI Qiao-ling1, ZHAO Qiang1, GUO Jian-ying1   

  1. 1. School of Resources and Environment, Lanzhou University, Lanzhou 730000 China;
    2. Cold and Arid Regions Environmental and Engineering Reaearch Institute, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2001-03-15 Revised:2001-06-08 Online:2002-04-20 Published:2002-04-20

摘要: 通过野外调查和室内分析,发现在花海剖面全新世出现了三次风成沙沉积,并对其原因进行了初步分析。初步认为风成沙的细粒组分可能主要为近源湖相,而粗粒组分则为沙漠戈壁区吹来。前两次风成沙在形成时代上可能与第一新冰期相对应,反映了沙漠的扩张状态。而且分析表明第一风沙形成期的冬季风强度和沙漠化过程似要比第二风沙期强,持续时间长。本区在全新世人类大规模活动之前就曾存在两次明显的沙漠化扩张过程,这为研究区域土地退化、荒漠化等问题提供了自然背景,特别是对西部大开发战略重点之一的生态环境保护与建设具有特殊的意义。

关键词: 花海, 古风成砂, 全新世, 环境变迁

Abstract: On the basis of field investigation and laboratory analysis, it was found that there were three layers of aeolian sand in Huahai Section, a Holocene lacustrine sediments. It was primarily assumed that the fine group in aeolian sand was the deposition of nearly lacustrine composition, while the thick was from desert. The time of the earlier two layers of aeolian sand formed corresponds with the New Ice Age. More-over, it indicates that intensity of winter monsoon in the first period of aeolian sand formed was stronger than that in the other twos in Holocene, and the duration is also longer. These provide natural background of the soil regeneration, desertification and has significant implication to the preservation and construction of ecological environments in West China.

Key words: Huahai, paleo-aeolian sand, Holocene, desertification

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