福井県嶺北地方の主要な水田土壌中の粘土鉱物組成

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The clay mineral Composition of thirty six paddy soils distributed in Reihoku District, Northeast part of Fukui Prefecture, was discussed quantitatively based on the results of X-ray diffraction method, differential thermal analysis, thermogravimetry and infrared absorption spectrometry. The outline of the results is as follows: Chloreite was dominant in the paddy soils from the south part of Ohno valley, the upper basin of Kuzuryu river. The considerable amount of mica clay minerals also existed in the soil of the valley. These minerals should be transported from Paleozoic or Mesozoic sediments in the upper stream of this river. Amorphous inorganic materials were rich in the foot of Kyogatake volcano, the east part of the valley. Mica clay minerals, chlorite, vermiculite and chlorite-vermiculite intergrade were found frequently in the paddy soils from Sakai plain, the lower basin of Kuzuryu river. A small amount of smectite was also present in there all soils. Mica clay minerals were dominant in the upper basin of Asuwa river. On the other hand, the contents of chlorite-vermiculite intergrade and kaokin minerals were high in the lower basin of this river. The content of mica clay minerals was extremely high in the paddy soils from the upper basin of Hino river, where are influenced strongly with Pareozoic sandstone and shale. Considerrable amount of chloritevermiculite intergrade also found in this basin. Smectite was very rich in the east side of the basin, locally. Kaolin minerals and chlorite-vermiculite intergrade were dominant in the paddy soils from Nyu mountain area. The amount of mica clay minerals was, however, high in a soil of this area.
日本ペドロジー学会の論文
1994-12-31

福井県嶺北地方の主要な水田土壌中の粘土鉱物組成

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