But Sudbury’s mining outlook positive with new projects on horizon
Despite occupying one of the most mineral-rich areas of the world, large swaths of the Sudbury Basin have remained unexplored.
Dan Farrow, the Sudbury District geologist with the Ontario Geological Survey, said Vale and Glencore hold a large number of patented mineral claims, for tracts of land in the Sudbury Basin only they can explore.
Because both companies have a number of productive mines in the region, they haven’t yet bothered to explore many of those regions. The patented claims – which lease mineral rights to the companies in question – are in an area geologists refer to as the eruptive.
Researchers estimate a meteor made impact more than 2 billion years ago with what is now the Sudbury Basin. The impact left a crater 200 kilometres in diameter, and brought molten magma beneath the Earth’s crust to surface.
The prevailing theory, said Farrow, is that the magma was rich in minerals, such as nickel and copper. When it hardened, it formed the mineral deposits that have defined the Sudbury Basin.
Sudbury’s mining giants Inco and Falconbridge – and later Vale and Glencore, respectively – jumped on rich contact deposits of solid ore. “That’s what Inco and Falconbridge mined for years because it was so easy,” Farrow said.