A Poorly-Crystallized Sepiolite From the Oeyama Nickel Mine, Kaya-Cho, Yosa-Gun, Kyoto Prefecture

Abstract

Sepiolite is a very rare mineral in Japan and only one occurrence has been reported hitherto. The sepiolite from the Oeyama nickel mine would be speculated to attribute its formation to the reaction between serpentine rock and supergene water descending along fissures in the rock, considering from its thermal analysis curve and X-ray data. Masatomo Muchi , Yoshiaki Hoshino, Isao Furusato solved sufficiently. Sepiolite is a very rare mineral in Japan particularly, there being hitherto only one occurrence from Yoshikawa-mura, Fukuoka Prefecture described by Muraoka, Minato , Takano and Okamoto (1958), and it being found in serpentine rock distributed widely in the region.