愛知県西三河地方の碧海層の粘土鉱物について
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概要
- 論文の詳細を見る
The Pleistocene Hekkai formation is distributed in the West Mikawa district, Aichi Prefecture. It is composed of sand, silt and clay, the latter two being mined as ceramic raw material. The clay mineralogy of these sediments is goverened by their position in the terrace and by their permeability. The clay fraction of the less permeable clay and of the sand overlaid by a clay bed are mainly composed of kaolinite, illite and vermiculite. This mineralogy may represent the original one formed during the sedimentation. On the other hand, the sand and silt which are located in the upper part of the terrace have large permeability and suffer weathering after the sedimentation, resulting in halloysite-rich clay fraction. The clay fraction of surface soil ,is composed of Al-vermiculite, illite, kaolinite and gibbsite. Abundant gibbsite is precipitated in sand bed beneath the soil.
- 日本粘土学会の論文
- 1971-03-05