Alteration Process and the Formation of a Chlorite/Smectite Interstratified Mineral in the Serpentinite Fragments of the Welded Tuff Located at the Fujiwara and Sudagai Area, Minakami, Gumma Prefecture

• SHIMODA Susumu

  The Institute of Geoscience, Tsukuba University

• HATTA Tamao

  The Institute of Geoscience, Tsukuba University

• NISHIYAMA Tsutomu

  Natural Science Laboratory, Toyo University

Bibliographic Information

Other Title

• 群馬県水上町藤原須田貝付近の溶結凝灰岩中のじゃ紋岩片の変質と混合層鉱物の生成
• グンマケン ミナカミマチ フジワラ スダ カイ フキン ノ ヨウケツ ギョウカ

Abstract

Many serpentinite fragments are recognized in the welded tuff located at the Fujiwara and Sudagai area, Minakami, Gumma Prefecture. In the fragments, a chlorite/smectite interstratified mineral is detected by X-ray together with smectite, chlorite, talc, serpentine and other non-clay minerals. The structure of interstratified mineral is almost regular, and chemically Mg is abundant. The mineral seems to be formed from serpentine by increasing temperature with chemical changes. The mechanism of the formation is not certain in this study, but smectite is formed in the early stage of the alteration by adding silica and increasing temperature.

Journal

• Journal of the Clay Science Society of Japan (in Japanese)

  Journal of the Clay Science Society of Japan (in Japanese) 22 (1), 10-18, 1982

  The Clay Science Society of Japan

Keywords

• Serpentinite
• Welded tuff
• Chlorite/smectite interstratified mineral

Details

• CRID: 1390282679089037824
• NII Article ID: 110003712694
• NII Book ID: AN00199972
• DOI: 10.11362/jcssjnendokagaku1961.22.10
• ISSN: 21863563
• ISSN: 04706455
• NDL BIB ID: 2434310
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I2434310
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • CiNii Articles
• Abstract License Flag: Disallowed