The new basic theory on Quaternary environmental research

作     者：ZHAO Jingbo 1, 2, 3 (1. Department of Geography, Shaanxi Normal University, Xi’an 710062, China 2. Center for Historical Environment and Socio-Economic Development in Northwest China, Shaanxi Normal University, Xi’an 710062, China 3. State Key Laboratory of Loess and Quaternary, Institute of Earth Environment, CAS, Xi’an 710075, China) 

作者机构：Department of Geography Shaanxi Normal University Xi’an China Center for Historical Environment and Socio-Economic Development in Northwest China Shaanxi Normal University Xi’an China State Key Laboratory of Loess and Quaternary Institute of Earth Environment CAS Xi’an China 

出 版 物：《Journal of Geographical Sciences》 (地理学报（英文版）)

年 卷 期：2004年第14卷第2期

页      面：242-250页

核心收录：

学科分类：070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 07[理学] 

基　　金：KeyProjectoftheMinistryofEducation No.01JAZJD770014 internationalitemofgeologicalcomparisonplan No.IGCP448 

主　　题：new illuvial theory Quaternary soils CaCO_3 remove illuvial types illuvial depth 

摘      要：On the basis of extensive survey to the Quaternary paleosols, soils and weathering layers in the vast northern China and the Loess Plateau, we found some unusually special phenomena of chemical components such as unsuccessive illuvium, twin illuviums, unusually thick illuvium and multi-illuviums etc. According to the analysis on the content of CaCO 3 and the data of penetrating experiment, a new theory of illuvial depth or removal depth of CaCO 3 in weathering and leaching belt was constructed, which indicates that the time of CaCO 3 removing to the illuvial depth is very short, and the effect of time factor on illuvial depth can be ignored. The theory can be taken as a credible foundation for studying many geological and geographical problems in weathering and leaching belt. When the illuvial depth of CaCO 3 is bigger than the thickness of developing belt of soil or paleosol, it can be determined that the paleosol has turned into weathering crust. When the illuvial depth of CaCO 3 is bigger than the thickness of paleosol, paleosol is leaching moderately acid soil. When two, three layers or unusually thick CaCO 3 illuviums exist in the same weathering section or at the bottom of the same paleosol, there were two or more periods forming paleosol and corresponding climatic stages at that time. On the basis of the equation of relationship between mean annual rainfall (y) and illuvial depth of CaCO 3 (x) (y = 305.5x + 168.5) determined in the paper, mean annual precipitation during the development of paleosol can be calculated.