GreenLight Metals (TSX-V: GRL | OTCQB: GRLMF): The First Drill Hole Through a 20-Year Mining Ban Came Up With Visible Gold
In the autumn of 2025, a drill rig in northern Wisconsin pulled a length of rock from 290 metres underground. Visible in the core, plain to the eye, were flecks of gold.
The ground that core came out of had not been touched by a drill in more than twenty years.
GreenLight Metals (🇨🇦GRL / 🇺🇸GRLMF) is the company that put the rig there. They are first through the door of a copper-gold mining belt that the state of Wisconsin sealed off in the mid-1990s and quietly reopened in 2017. Right now, they are the only company drilling it.
Twenty years frozen
To understand why that fact carries weight, you have to know what got frozen.
The Penokean Volcanic Belt runs through the northern part of Wisconsin. It shares the same rock formation as two of the most productive mining camps in North America, the Abitibi and the Flin Flon, both of which sit just over the border in Canada and have produced billions of dollars of metal across the last hundred years. The Canadian side of that geology got drilled, mapped, and turned into mines. The Wisconsin side was politically sealed by a state moratorium on non-ferrous mining. For more than twenty years, nobody could drill it. The capital walked away. The majors moved on.
The ban came off in 2017. The state modernized its permitting framework. And for nearly a decade after that, almost nobody actually moved.
Matt Filgate listed GreenLight Metals on the TSX Venture Exchange in April 2025 and walked straight into the gap. He locked up the best ground. He got the permits. He started drilling.