“That classification debt, unfortunately, needs to get paid,” he told about 430 conference participants from 21 countries at CIM’s first Mineral Resources & Mineral Reserves conference. “The CEO may be walking around with a 3-million-oz. resource estimate, but they haven’t earned that classification with sufficient drilling. When the debt comes due, it’s often through painful reclassifications and revisions.”
Decade of missteps
Several recent projects have demonstrated the high cost of classification debt.
Rubicon Resources’ catastrophic 91% downgrade in resource estimates in 2015 stands as one of the most glaring examples. After it began initial production at the F2 gold deposit on its Phoenix property in Ontario’s Red Lake district, the company found the deposit to be uneconomic, shuttering the operation. It had not completed a feasibility study for the high-grade project.
The size of the downgrade blindsided…
