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干旱区地理 ›› 2003, Vol. 26 ›› Issue (1): 23-29.doi: 10.13826/j.cnki.cn65-1103/x.2003.01.005

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中国西风区黄土常量元素地球化学行为与古环境

叶玮1, Yabuki Sadaya2, Kanayama Shinji2   

  1. 1.浙江师范大学旅游与资源管理学院, 金华321004;
    2.The Institute of Physical and Chemical Research, Sitama35-0198, Japan
  • 收稿日期:2002-05-16 修回日期:2002-12-21 发布日期:2025-12-31
  • 基金资助:
    国家重点基础研究发展规划项目(批准号:G1999043502)和国家自然科学基金项目(批准号:49671009)和日本理化学所国际合作项目资助

GEOCHEMICAL BEHAVIOR OF MAJOR ELEMENT OF LOESS IN WESTERLY AREA OF CHINA AND PALEOCLIMATIC IMPLICATIONS

Ye Wei1, Yabuki Sadaya2, Kanayama Shinji2   

  1. 1. College of Tourism and Resource Management, Zhejiang Normal University, Jinhua, 321004, China;
    2. The Institute of Physical and Chemical Research, Sitama35-0198, Japan
  • Received:2002-05-16 Revised:2002-12-21 Online:2025-12-31

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摘要： 位于中国西风区新疆伊犁盆地黄土与古土壤样品的常量元素分析表明, 其烧失量和SiO2含量与样品的碳酸盐含量正相关。黄土与古土壤SiO2含量没有明显差别, 但Al、Fe、Mn和K在古土壤中发生一定的分异, 代表了相对强的成壤作用。与黄土高原相比, 伊犁盆地末次间冰期古土壤富钛、铁、锰、镁和钙(个别样品除外), 而黄土高原S1更加贫钠和钾, 而且钙含量很低;末次冰期黄土富锰、镁和钙, 贫钠和钾, 而黄土高原L1以富钙贫钠、钾为特征。常量元素地球化学行为揭示, 伊犁黄土与古土壤较黄土高原同期黄土与古土壤形成于更加干旱的气候环境中。

关键词: 西风区, 黄土, 古环境, 伊犁, 新疆

Abstract: Yili basin is located at the northwest of China where the climate is influenced by westerlies year in year out and loess is widespread. According to the dating of TL, most of the loess accumulated during the last glaciation. 48 samples of loess and paleosols collected from Yili area of China were analyzed. The major element composition were measured by a VA-320 A X-ray fluorescence spectrometer. Analytical uncertainties are less than ±2% for all major element and the loss ignition was obtained by weighting after one hour of caldination at 950℃. The result shows that the loss ignition of loess and paleosol are positively related to the concentration of CaCO 3 and the percentage of SiO 2 as well as. The relative coefficient (R 2) are 0.9548 and 0.7029 respectively. The paleosol can be distinguished by a relatively high content of Al, Fe, Mn and K from the loess, even though the percentages of SiO 2 are not different significantly. This implies that the pedogenisis was stronger during the paleosol developing and the soil was formed under an oxidation and alkaline condition. The paleosol developed during last glaciation in Yili basin is rich in Ti, Fe, Mn, Mg and Ca, while S 1 at the Loess Plateau is poor at Ca, Na and K contrasting to that of the Loess Plateau, the Yili loess (L 1) is characterized by a high content of Ca, Mg and Mn All of these suggest that the Yili loess and paleosol developed under more arid climate.

Key words: Westerly area, loess, paleoenvironment, Yili, Xinjiang

中图分类号: 

  • P595