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Commerce Resources announces tailings management progress for Canadian rare earths deposit

by Greg Klein | May 14, 2020

Commerce Resources announces tailings management progress for Canadian rare earths deposit

The laboratory set-up for
kinetic testing by le Centre
Eau Terre Environnement.

One day after reporting on the Ashram rare earths flowsheet studies conducted by Natural Resources Canada’s CanmetMINING division, Commerce Resources TSXV:CCE announced findings from tailings management studies for the Quebec deposit. Undertaken by le Centre Eau Terre Environnement of l’Institut national de la recherche scientifique, the tests found the flotation tailings are “relatively benign with no major issues identified with the material or its management,” Commerce stated.

The study found “tailings are not acid-generating due to the material’s high carbonate and low sulphide content resulting in a natural neutralization effect,” an advantage that also cuts costs.

Additionally, the tailings aren’t considered hazardous or radioactive according to Quebec’s Hazardous Materials Regulations and Environmental Quality Act.

“Concentrations of all elements in the tailings’ leachate fall below the ‘high-risk’ criteria as outlined in Directive 019,” Commerce pointed out.

Further test work is required on freeze-thaw cycles, which “appear to play an important role in mineral solubility.”

Kinetic tests continue to provide data “for better understanding of how the tailings may be altered over time and for proper mitigation measures to be implemented if any elements are indicated to be potentially problematic to the environment.”

The next steps will include creating a model of tailings weathering.

The project was expected to conclude in December but Commerce and the INRS are considering an extension under similar funding. The studies have been backed by a $300,000 grant provided jointly by le Fonds de recherche du Québec—Nature et technologies and le Ministère de l’Énergie et des Ressources naturelles.

See recent news about flowsheet studies for Commerce Resources’ Ashram rare earths deposit.

Read more about Commerce Resources.

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