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首页> 外文期刊>Journal of geographical sciences >The new basic theory on Quaternary environmental research
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The new basic theory on Quaternary environmental research

机译：第四纪环境研究的新基础理论

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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.
机译：在对中国北方和黄土高原的第四纪古土壤，土壤和风化层进行广泛调查的基础上，我们发现了一些化学成分异常的特殊现象，例如不成功的illuvium，孪晶illuvium，不寻常的illuvium和multi-illuvium等。 。通过对CaCO_3含量的分析和渗透实验数据，建立了风化淋滤带中CaCO_3的溶蚀深度或去除深度的新理论，表明CaCO_3去除到溶蚀深度的时间非常长。短，时间因素对冲积深度的影响可以忽略。该理论可以作为研究风化浸出带中许多地质和地理问题的可靠基础。当CaCO_3的流变深度大于土壤或古土壤发育带的厚度时，可以确定古土壤已变成风化壳。当CaCO_3的溶蚀深度大于古土壤厚度时，古土壤浸出中等酸性土壤。当在同一风化区或同一古土壤的底部存在两，三层或异常厚的CaCO_3 illuviums时，有两个或多个时期形成古土壤和相应的气候阶段。根据本文确定的年平均降水量（y）与CaCO_3（x）的逆流深度之间的关系方程（y = 305.5x + 168.5），可以计算出古土壤发展过程中的年平均降水量。

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