A Chemical and Mineralogical Study of Clay Materials from Several Gray-Brown Podzolic Soils of Minnesota 1
A Chemical and Mineralogical Study of Clay Materials from Several Gray-Brown Podzolic Soils of Minnesota 1
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明尼苏达州几种灰棕色灰化土中粘土材料的化学和矿物学研究 1
DOI：
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发表时间：
1955
期刊：
影响因子：
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通讯作者：
F. L. Hammers
中科院分区：
文献类型：
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作者：
A. Caldwell;R. Farnham;F. L. Hammers
土壤样品采集自两个发育自Peorian黄土的Fayette土、一个发育自威斯康星州的卡里亚期的非钙质冰碛物的Milaca土和一个发育自威斯康星州的曼卡托亚期的钙质冰碛物的Hayden土。形态观察将这些土壤置于灰棕色灰壤组。力学分析表明，这些土壤是粉砂壤土。B层中的一些粘土堆积证实了发生了一些灰化的野外观察。从这些剖面的A层、A层、B层、B层和C层中分离出粒度小于0.5µ的粘土物质。粘土组分的总化学分析表明，剖面内和剖面之间的无机成分含量差别不大。一些粘土的X射线衍射和差热分析表明粘土矿物主要是蒙脱石型。相对较高的总交换容量的粘土也表明蒙脱石型粘土矿物。
Soil samples were collected from two Fayette soils developed from Peorian loess, one Milaca formed from non-calcareous glacial till of Cary substage of the Wisconsin, and one Hayden soil developed from calcareous glacial till of Mankato substage of the Wisconsin. Morphological observations placed these soils in the Gray-Brown Podzolic group. Mechanical analysis showed these soils to be silt loams. Some accumulation of clay in the B₂ horizon substantiated field observations of some podzolization having occurred. The clay material less than 0.5µ in size was separated from the A₁, A₂, B₁, B₂, and C horizons of these profiles. Total chemical analysis of the clay fraction showed little differentiation in content of inorganic constituents within and between profiles. X-ray diffraction and differential thermal analysis of some of the clays indicated clay minerals largely of the montmorillonitic type. Relatively high total exchange capacities of the clays were indicative also of montmorillonitic types of clay minerals.