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中国沙漠 ›› 2005, Vol. 25 ›› Issue (3): 409-411.

• 研究论文 • 上一篇    下一篇

长安四府村32~10 ka BP期间沙尘暴活动的记录

蔡小薇1, 赵景波1,2   

  1. 1. 陕西师范大学旅游与环境学院, 陕西西安 710062;
    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 710075
  • 收稿日期:2004-01-20 修回日期:2004-03-17 出版日期:2005-06-20 发布日期:2005-06-20
  • 作者简介:蔡小薇(1977-),女(汉族),陕西岐山人,硕士生,主要从事自然地理与环境研究。E-mail:smilecxw@163.com
  • 基金资助:
    陕西师范大学历史地理国家重点学科项目(SNNUHG04007);中国科学院黄土与第四纪地质国家重点实验室项目(SKLLQG0411)共同资助

Loess Record of Sand-Dust Storm Activity during 32~10 ka BP in Sifu Village, Chang'an, Shaanxi Province

CAI Xiao-wei1, ZHAO Jing-bo1,2   

  1. 1. College of Tourism and Environment Science, Shaanxi Normal University, Xi'an 710062, China;
    2. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710054, China
  • Received:2004-01-20 Revised:2004-03-17 Online:2005-06-20 Published:2005-06-20

摘要: 通过对长安区四府村剖面晚更新世后期黄土样品的粒度分析测定,探讨了沙尘暴活动与土壤颗粒组成的关系及32~10kaBP以来的沙尘暴的活动趋势。结果表明,黄土古土壤序列中粗粉砂含量高和粘粒含量低,反映当时沙尘暴活动强烈,反之,沙尘暴活动弱。冰期沙尘暴活动强主要是冰期降水量少造成的,温度低是次要的。古土壤层S10中的粘粒既包含风尘堆积的原始组分,也包含风化成壤过程中对先前发育的黄土L21改造后的次生组分。32~10kaBP以来,沙尘暴活动具有由弱到强的变化趋势,其中23~10kaBP间活动最强。

关键词: 长安四府村, 晚更新世后期, 黄土记录, 颗粒成分, 沙尘暴

Abstract: According to the grain-size analysis of Loess sample developed in late Pleistocene, we discuss the relationship between the activity of sand-dust storm and grain-size of Loess profile, and know the trend of sand-dust storm activity from 32 ka BP to 10 ka BP. As the result, the content of thick grain reflected the strong period of sand-dust storm activity; on the country, the content of thin grain reflected the sand-dust storm was weak. The sand-dust storm activity was strong during ice age mainly because of the less precipitation but not the low temperature. The form of palaeosol S1 0 is caused by later change of Loess L2 1. The sand-dust storm activity had changing trend from weak to strong from 32 ka BP to 10 ka BP.

Key words: Sifu village in Chang'an, the late Pleistocene, Loess record, grain composition, sand-dust storm

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