A review on the deposits of kaolin and kaolinitic clays.

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  • カオリン質粘土の鉱床学
  • カオリンシツ ネンド ノ コウショウガク

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Abstract

Geology and mineralogy of kaolin deposits and kaolinitic clay deposits are reviewed. They are classified as follows.<BR>1. Deposits of primary kaolin<BR>1.1 Deposits of combined hydrothermal-weathering origin<BR>1.2 Residual deposits mainly formed by tropical weathering<BR>1.3 Solfataric deposits formed by shallow hydrothermal action<BR>2. Deposits accompanied by sandy sediments<BR>2.1 Sedimentary kaolin deposits<BR>2.2 Kaolinitic sand with kaolinization either before or after sedimentation<BR>3. Kaolinitic clay deposits accompanied by coal or lignite<BR>3.1 Ball clay, i. e., plastic carbonaceous clay<BR>3.2 Fireclay including high-alumina fireclay and flint clay<BR>3.3 Tonstein and allied clay of volcanic-ash origin

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