Kimobetsu mine

…It is often found as a secondary mineral of arsenic-containing minerals such as arsenopyrite in the oxidation zones of metal deposits, but the crystals found in the oxidation zones of the Kinoura mine in Oita Prefecture are large and beautiful, and are famous both in Japan and overseas. In addition, in the limonite deposits of the Kimobetsu mine in southwestern Hokkaido, aggregates of microcrystals exist in the form of veins, sometimes reaching widths of several tens of centimeters, and have been problematic as a harmful component mixed into iron ore. Among these, a species in which part of the Fe has been replaced by Al (aluminoscorodite) has also been found, which has attracted attention. …

*Some of the terms mentioned in relation to Kimobetsu Mine are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…金属鉱床の酸化帯などに硫ヒ鉄鉱など含ヒ素鉱物の二次鉱物として産出することが多いが，大分県木浦鉱山の酸化帯から産出した結晶は大型で美しく，国外でも著名である。また北海道南西部喜茂別鉱山の褐鉄鉱鉱床中には微結晶の集合体が脈状に存在し，ときには幅数十cmにおよぶこともあり，鉄鉱石に混入する有害成分として問題とされた。またその中にはFeの一部をAlにより置換した種(アルミノスコロダイト)も産出して注目された。…

※「喜茂別鉱山」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報