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Mining the Northwest: Lake Superior's North Shore remains fertile ground for gold, high-tech metals - Northern Ontario Business
Water was discovered flowing from an unpermitted gold mine in San Juan County. Here's how the state and forest service worked to clean it up.
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Pure Gold Mining's Madsen Red Lake Gold Mine: Ontario's Next, High-Grade Gold Mine – Canadian Mining Magazine
![An underground lake in the Minas de Passagem (old gold mine) near Ouro Preto in Brazil Stock Photo - Alamy An underground lake in the Minas de Passagem (old gold mine) near Ouro Preto in Brazil Stock Photo - Alamy](https://c8.alamy.com/comp/A7GB7W/an-underground-lake-in-the-minas-de-passagem-old-gold-mine-near-ouro-A7GB7W.jpg)