秋田県横手市及び大森町八沢木のゼオライト岩開発の推移と新知見

概要

論文の詳細を見る
The first discovery of zeolite rock in Japan was done in 1949 by Sudo et al. from the pumiceous tuff of Utsunomiya, which we call Oyaishi. In the following year, Sudo reported the occurrence of a zeolite-bearing bentonite deposit at Yokote. Akita Prefecture. The locality names, Asakura and Morokozawa were often cited in these papers, however, thier localities were not mentioned in detail. In this paper. I clarifies the localities of both places and briefly summarizes the exploitative history of zeolite rock at Yokote. A smectite clay deposit which includes zeolite sporadically occurs at Yasawagi, Omori-machi, Akita Prefecture and was named "Yasawagi clay" by the author in 1959. Since then, the exploitation of the deposits has been continued until today, and the products are commercially called "Soft Silica". Recently, the author found K-feldspar bearing rocks which were originated from tuff beds in the Yasawagi clay. Thus, mode of occurrece and mineralogical properties of the K-feldspar rocks are described and its genesis are also inferred in this paper.
日本粘土学会の論文
1990-11-20