Orientation Analysis and Formation Ages of Fractures Filled with Clay Minerals (Clay Veins) in Hiroshima and Shimane Prefectures, Southwest Japan

Ryuji KITAGAWA, Hirotsugu NISHIDO
1994 Journal of the Japan Society of Engineering Geology  
Fractures filled with clay minerals (clay veins) occur extensively in granitic andrhyolitic rocks throughout Hiroshima and Shimane Prefectures, southwest Japan. The main constituent clay minerals are mica clay mineral,
doi:10.5110/jjseg.35.60 fatcat:mydmgzisonbprkitquezqafmbe