Yanahara Mine

Japanese: 柵原鉱山 - やなはらこうざん

This iron sulfide mine was located in Sakahara, Misaki-cho, Okayama Prefecture. In 1916, Fujita-gumi (which changed its name to Dowa Mining in 1945) purchased the mine and developed it, making it the largest iron sulfide mine in Japan. The deposit is a massive deposit with Paleozoic slate, diabase, and felsic rocks as host rocks, and underground and open-cut mining was carried out using methods such as filling-type upward step mining, top slicing, and subleveling. However, production began to decline in the late 1960s, and the mine was closed in 1991.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

岡山県美咲町の柵原にあった硫化鉄鉱山。 1916年藤田組 (1945同和鉱業に社名変更) が買収して開発を進め，日本最大の硫化鉄鉱山となった。鉱床は古生代の粘板岩，輝緑岩，ケイ長岩類を母岩とする塊状鉱床で，充填式上向き階段掘り，トップスライシング法，サブレベル法などによる坑内採掘と露天掘りを行なっていた。しかし 1960年代後半以降生産量が減少し 1991年閉山。

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