風化変質により生成する粘土鉱物とその性質

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タイトル別名
  • Clay minerals produced by weathering and their properties.
  • フウカ ヘンシツ ニ ヨリ セイセイスル ネンド コウブツ ト ソノ セイシツ

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抄録

Minerals comprising rocks are attacked by meteoric water and air and alter their structual and chemical properties. The minerals change to intermediate and/or new minerals in such weathering process. In this paper, relatively early products of the chemical weathering from mica minerals, chlorite and smectite are referred.<BR>The vermiculite weathered from biotite in schalstein at Ofuku, Yamaguchi Pref. has cube-like materials in about 50Å size at the edge of the crack on surface and in an exforiated interlayer space. Chlorite-vermiculite interstratified minerals weathered from chlorite in schalstein and sedimentary rocks from Tobigamori, Iwate Pref. are estimated comprising about 50% of a vermiculite-like layer by X-ray diffraction analysis. The degree of swelling of their interlayers after various K+-treatments distinctively change among samples and with particle sizes of the samples. The interstratified chlorite-vermiculite alters to kaolinite with the relationship of syntaxy.

収録刊行物

  • 粘土科学

    粘土科学 25 (3), 101-106, 1985

    一般社団法人 日本粘土学会

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