Topic
Illuvium
About: Illuvium is a research topic. Over the lifetime, 2 publications have been published within this topic receiving 19 citations.
Papers
TL;DR: Wang et al. as mentioned in this paper constructed a new theory of illuvial depth or removal depth of CaCO3 in weathering and leaching belt, which indicates that the time of Ca CO3 removing to the illUVial depth is very short, and the effect of time factor on illUV depth can be ignored.
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 CaCO3 and the data of penetrating experiment, a new theory of illuvial depth or removal depth of CaCO3 in weathering and leaching belt was constructed, which indicates that the time of CaCO3 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 CaCO3 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 CaCO3 is bigger than the thickness of paleosol, paleosol is leaching moderately acid soil. When two, three layers or unusually thick CaCO3 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 CaCO3 (x) (y = 305.5x + 168.5) determined in the paper, mean annual precipitation during the development of paleosol can be calculated.
14 citations
TL;DR: In this paper, a series of laboratory experiments designed to simulate the formation of intrapedal cutans was carried out through repetitive leachings of undisturbed blocks of soils (6 × 3 × 4 cm3) by suspensions (0.3% concentration) of clay-sized particles from two commonly occurring Bt horizons in southern England.
Abstract: SUMMARY
A series of laboratory experiments designed to simulate the formation of intrapedal cutans was carried out through repetitive leachings of undisturbed blocks of soils (6 × 3 × 4 cm3) by suspensions (0.3% concentration) of clay-sized particles from two commonly occurring Bt horizons in southern England. After leaching, thin sections were cut and point-counted, thus enabling the visual recognition, replication and potential quantification of newly formed intrapedal pore and grain cutans. They all exhibit morphological, physical and optical properties diagnostic of illuviation cutans, and can be differentiated from inherited cutans on these and on spatial grounds. A general relationship between numbers of newly formed cutans and increasing leaching cycles was observed, and experimental support obtained from these soils for the significance of the complex, three-dimensional spatial pattern of tubular pores in the translocation of clay-sized materials and the formation of these argillic, Bt horizons. This study highlights both the value and difficulties of designing laboratory-based, soil/water/gravity studies in pedology.
8 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2004 | 1 |
| 1985 | 1 |