MINERALOGICAL STUDY ON THE CLAY RICH IN CHLORITE ASSOCIATED WITH THE GYPSUM DEPOSIT OF THE IWAMI MINE. SHIMANE PREFECTURE
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概要
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Magnesium-rich clays are distributed around the hydrothermal replace ment deposit of gypsum in the Tertairy rocks of the Iwami mine, Shimane Prefecture. Generally speaking, the principal constetuent mineral is a magnesium-rich chlorite, accompanied by other accessory minerals such as montmorillonite, illite, 11 Å mineral, 30 Å mineral, gypsum, quartz, calcite, and pyrite. In the light of X-ray data, the 30 Å mineral can be indentified as interstratified mineral of chlorite-montmorillonite, and 11 Å mineral is hydrous complex of mica clay mineral ; interstratified combination of illite and its more hdrated layers. Particularly some specimens have very complicated mineral compositions containing 30 Å mineral, chlorite, and montmorillonite Chemical compositions and differential thermal analysis curves are shown.
- 日本粘土学会の論文
著者
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Sudo Toshio
Geological And Mineralogical Institute Faculty Of Science Tokyo University Of Education
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OSADA Masanori
Geological and Mineralogical Institute, Faculty of Science, Tokyo University of Education
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Osada Masanori
Geological And Mineralogical Institute Faculty Of Science Tokyo University Of Education
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