地理科学 ›› 1988, Vol. 8 ›› Issue (3): 226-231,295.doi: 10.13249/j.cnki.sgs.1988.03.226

• 论文 • 上一篇    下一篇

黄土中的有机质

刁桂仪, 文启忠   

  1. 中国科学院地球化学研究所 贵阳
  • 出版日期:1988-05-20 发布日期:1988-05-20

THE ORGANIC MATTER IN LOESS

Diao Guiyi, Wen Qizhong   

  1. Institute of Geochemistry, Academia Sinica, Guiyang
  • Online:1988-05-20 Published:1988-05-20

摘要: 据110块样品的分析结果,黄河中游黄土的有机质含量范围是0.179-0.883%,平均值为0.39%,频率分布主要集中在0.200-0.600%范围.区域上的分布,由西北向东南含量增加.剖面上的分布随深度的增加而降低.黄土层和黄土壤层的有机质在埋藏过程中都有被"丢失"的现象,而这一现象可能主要发生在距今约80万年前.

Abstract: The analysis results of 110 loess samples from the middle reaches of the Huanghe River show that the contents of Organic matter range from 0.179 to 0.883%,with an average value of 0.390%,most in extent of 0.2000.600%.The contents increase from northwest to southeast.The contents of the organic matter in loess profile decrease with depth increasing.The phenomenon known as"been lost"of organic matter are observed in both loess and paleosol,This process might be accomplished 800,000 years ago,