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The new basic theory on Quaternary environmental research

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Journal of Geographical Sciences : Volume 13

Journal of Geographical Sciences : Volume 12

Journal of Geographical Sciences : Volume 11

The new basic theory on Quaternary environmental research

Content Provider	Springer Nature Link
Author	Jingbo, Zhao
Copyright Year	2004
Abstract	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.
Starting Page	242
Ending Page	250
Page Count	9
File Format	PDF
ISSN	1009637X
Journal	Journal of Geographical Sciences
Volume Number	14
Issue Number	2
e-ISSN	18619568
Language	English
Publisher	Science in China Press
Publisher Date	2004-01-01
Publisher Place	Beijing
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	new illuvial theory Quaternary soils CaCO$_{3}$ remove illuvial types illuvial depth Physical Geography Nature Conservation Geographical Information Systems/Cartography Remote Sensing/Photogrammetry
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences

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