北関東における火山砕せつ物の風化に関する１事実

DOI Web Site 被引用文献1件

書誌事項

タイトル別名
  • A Note on Halloysite Formation in Weathered Pyroclastics Based on an Observation in the Northern Kanto District
  • キタ カントウ ニ オケル カザン サイセツブツ ノ フウカ ニ カンスル イ

この論文をさがす

抄録

On the occasion of the Field Trip of the 20th Meeting of the Clay Science Society. of Japan, we visited Itabashi, Tochigi Prefecture, where a pile of weathered pyroclastics was exposed. It is composed of Shichihonzakura Pumice, Imaichi Pumice, Tawara Volcanic Ash, Takaragi Volcanic Ash and Kanuma Pumice in descending order. The Takaragi Volcanic Ash is composed of halloysite. Although the Kanuma Pumice is composed of allophane, halloysite was formed in its uppermost part along the boundary with the Takaragi Volcanic Ash. This fact seems to support the Kanno's opinion that halloysite is formed by resilication to which silica carried by percolating water is responsible. Allophane formation in the upper part of pyroclastic deposits and halloysite formation in the lower part of them may be coupled chemical reactions; silica released by allophane formation migrates downwards and is used for halloysite formation.

収録刊行物

  • 粘土科学

    粘土科学 18 (2), 68-71, 1978

    一般社団法人 日本粘土学会

被引用文献 (1)*注記

もっと見る

詳細情報 詳細情報について

問題の指摘

ページトップへ