Volumetric Fractal Dimension Characteristics of Loess-Paleosol Sequence and Its Environmental Significance in Huangping Village,Yunxian County,Hubei Province
Liu Tao
Pang Jiangli
Huang Chunchang
Zha Xiaochun
Zhou Yali
Mao Peini
Hu Hui
Abstract：The volumetric fractal dimensions of particle-size(D) in soil profile of Huangping Village (HPC), Yunxian County, Hubei Province were calculated by the volumetric fractal dimension mode. The fractal dimension values were between 2. 52 and 2. 78, and the highest one was in the paleosol layer(S0) and the lowest one was in the Malan loess layer(L1). The fractal dimension values in the whole profiles was ranked as DS0 > DLt > DL0 > DL1. This study discovered that the fractal dimension values were positively correlated to the clay content, negatively correlated to the coarse silt content, and was in direct proportion to magnetic susceptibility and CIA value. The fractal dimension could be used to reflect the evolution of pedogenic environment. The higher value reflected warm and humid, whereas lower value reflected arid and cold. The fractal characteristics of HPC soil profile indicted the history of climate change in Hanjiang area. During the late pleistocene, the fractal dimension value of L1 was only 2. 61, indicated cold climate and weak pedogenesis. During the early holocene, the value in Lt increased to 2. 71 compared with L1, which indicated the climate was improved and warmer. During the middle holocene, the value in S0 increased to 2. 75, indicated warm and humid climate and strong pedogenesis. During the late holocene, the value in L0 reduced to 2. 70, indicated that the climate in Hanjiang area became cool.
Keywords：Volumetric fractal dimensionPartide size compositionMagnetic susceptibilityCIA valueDepositional environment
Publication Date：2018-04-02
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：6( 73-78 )