尾去沢鉱山跡
三菱の経営下にあった約 90 年間に 2,850 万 t の粗鉱が採掘され、生産量は銅 30 万 t、金 4.4 t、銀 155 t、鉛 1 万 t、亜鉛 1 万 t ほどに及ぶと推定されます。
1978 年閉山
Osarizawa Mine
The mine produced approximately 28.5 million tonnes of crude ore, 300,000 tonnes of copper, 4.4 tonnes of gold, 155 tonnes of silver, and 10,000 tonnes of lead and zinc respectively over approximately 90 years under the management of Mitsubishi.
closure in 1978