关中东部全新世黄土——古土壤序列微量元素分布特征及意义  

Distributions of Trace-elements in Holocene Loess-palaeosol Sequences and Its Significance in the Eastern of Guanzhong

作　　者：李艳华[1] 庞奖励[1] 黄春长[1] 查小春[1] 丁敏[1] 牛晓露[1] 王丽娟[1] 

机构地区：[1]陕西师范大学旅游与环境学院,陕西西安710062

出　　处：《土壤通报》2012年第1期125-130,共6页Chinese Journal of Soil Science

基　　金：中央高校基本科研业务费专项基金(KG200901007);国家自然基金重点项目(41030637)资助

摘　　要：X-荧光光谱仪、磁化率仪和激光粒度仪对尧禾村(YHC)全新世黄土-古土壤序列的微量元素、磁化率、粘粒(<5μm)含量进行了测量。将磁化率曲线、粘粒曲线、Rb/Sr变化曲线和Ba/Sr变化曲线进行了对比分析发现:YHC剖面的磁化率曲线、粘粒曲线、Rb/Sr曲线和Ba/Sr曲线具有高度的同步同向变化趋势,可很好的指示研究区域内全新世的气候变化。而元素的含量变化是该区域气候变化的结果,其中Pb元素在黄土中的含量明显高于古土壤层,属于淋失性元素。Mn、Cr、Cu、Zn、Co、Ti元素在古土壤含量高于黄土层,属于富集性元素。The contents of trace-elements and their variations,were determined in the soils, including the magnetic susceptibility and the cosmid （〈 5 μm） by X-Ray Fluorescence, susceptibility meter and Mastersizer 2000 and then contrasted the curves of magnetic susceptibility, cosmid, Rb/Sr and Ba/Sr. It was found that the curves of magnetic susceptibility, cosmid, Rb/Sr and Ba/Sr in YHC profile had a high degree changing trend in pacing and aspect, andthey could be good indicators of eastern of Guanzhong in climate changing. And the distributions of trace-elements in studying area were the direct results of climate changing in the eastern of Guanzhong. In which it was clearly that the migratory element Pb had a more content in loess than in So, but the enrichment elements Mn, Cr, Cu, Zn, Co and Ti had more contents in So than in the loess.

关 键 词：全新世 黄土-古土壤 微量元素 关中东部 

分 类 号：P597.2[天文地球—地球化学]