地理学报 ›› 1995, Vol. 62 ›› Issue (1): 35-40.doi: 10.11821/xb199501004

• 论文 • 上一篇    下一篇

黄土中古土壤淀积类型

赵景波   

  1. 西安地质学院, 西安 710054
  • 收稿日期:1994-04-01 修回日期:1994-05-01 出版日期:1995-01-15 发布日期:1995-01-15
  • 基金资助:
    中国科学院西安黄土与第四纪地质国家重点实验室资助

A STUDY ON THE TYPES OF ILLUVIAL HORIZONS OF THE PALEOSOLS IN THE LOESS AREA

Zhao Jingbo   

  1. Xi’ an College of Geology. Xi’ an 710054
  • Received:1994-04-01 Revised:1994-05-01 Online:1995-01-15 Published:1995-01-15

摘要: 作者在西安附近发现了第1、4层古土壤的双层淀积和第5、8层古土壤多层淀现象。资料表明,双层淀积、多层淀积和厚度异常大的CaCO淀积层是土壤具多元发生过程或受后期淋溶的产物,它们常代表两个或两个以上的成壤期。第1层古土壤下部的两层结核均不属古土壤组成部分,该层土壤为中、酸性森林土壤。第8层古土壤特殊的厚层淀积代表了气候的多次变化和多个成壤期。第4、5层古土壤具不连续CaCO和Fe、Al淀积层,这两层古土壤为酸性森林土壤。

关键词: 古土壤类型, 淀积层, 黄土

Abstract: On the basis of investigation, double layer illuvial horizon under 1st and 4th paleosol layers and multi-layer illuvial horizons under 5th and 8th paleosol layers, which were not previously discovered, have been discovered. The materials obtained show that double layer illuvial horizons and multi-layer illuvial horizons as well as much thick illuvial horizons of CaCO3 were formed in the repeated soil-forming processes or by the leaching after the formation of soils. There is a difference in the shape, distribution, texture and composition between contemporaneous concretions and deuterogenic concretions. The double illuvial horizons of CaCO3 under 1st paleosol do not belong to constitution part, the paleosol was neutral or acid forest soil not having illuvial horizon of CaCO3 in the soil profile. The thick illuvial horizon in the 8th paleosol layer indicates the repeated soil-forming processes and climate changes. In the illuvial horizons of discontinuous CaCO3 concretion, Al2O3 and Fe2O3ocour under the 4th and 5th paleosol layers, and the two paleosols are the acid soils developed under the forests.

Key words: Types of paleosols, Illuvial horizons, Loess

中图分类号: 

  • P642.131