Influence of Particle Size on Magnetic Properties of Soils in Zhejiang Province, China

作     者：LU SHENGGAO (College of Environment and Resource, Zhejiang University, Hangzhou 510029 (China)) LU SHENGGAO (College of Environment and Resource, Zhejiang University, Hangzhou 510029 (China))

作者机构：浙江大学 浙江 杭州 310029 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2000年第10卷第1期

页      面：81-88页

核心收录：

学科分类：0818[工学-地质资源与地质工程] 09[农学] 0903[农学-农业资源与环境] 0901[农学-作物学] 090301[农学-土壤学] 

基　　金：Project (No. 49971044 and No. 49301010) supported by the National Natural Science Foundation of China 

主　　题：土壤 粒度 成土母质 磁性 浙江 变质岩 花岗岩 玄武岩 

摘      要：The relationship between magnetic properties and particle size of soils derived from metamorphic rock, basalt, granite, Quaternary red clay, limestone and mudstone from Zhejiang Province, East China was studied. Based on the variations of the mass magnetic susceptibility (X), anhysteretic remanent magnetization (ARM), and saturation isothermal remanent magnetization (SIRM) with soil particle size, the relationship could be classified into three groups. For the soils derived from metamorphic rock and basalt, magnetic values were the highest in the gravel and coarse sand fractions and decreased with decreasing soil particle size. The soils derived from sedimentary rock had a bimodal distribution of magnetic values, with peaks in 1-0.5 and 0.005-0.000 5 mm fractions. The soil developed on granite was characterized by a peak of magnetic value in 0.001-0.000 5 mm fractions. Frequency-dependent susceptibility (Xfd ) and ratics of magnetic parameters (ARM/X, SIRM/X and SIRM/ARM) of soil particle fractions showed that variations in ferrimagnetic grain size paralleled those in particle size. Xfd peaked in clay fraction and decreased with increasing particle size, irrespective of soil parent materials. The acquisition curves of IRM and demagnetization parameter of different soil particles indicated that there were different magnetic minerals assemblages in different particle fractions.