NioBay’s Crevier niobium-tantalum project: economics and design notes for mine planners
Reviewed by Joe Ashwell

First reported on MINING.com
30 Second Briefing
NioBay Metals is seeking strategic and offtake partners, including major miners and defence clients, to fund a prefeasibility study and environmental work for its Crevier niobium-tantalum open-pit project in Quebec, targeting first production in the early 2030s. The February 2026 resource outlines 23.7 million measured and indicated tonnes at 0.17% Nb and 202 ppm Ta plus 12.8 million inferred tonnes at 0.12% Nb and 131 ppm Ta, with a 20-year mine plan and projected annual revenue of C$118–C$110 million against C$55–C$80 million in operating costs. A 10,000-metre drilling campaign, high-purity metallurgical test results and a C$500,000 Quebec grant to optimise hydrometallurgical processing aim to lift resources by at least 25% and strengthen economics for what could be North America’s only niobium-tantalum oxide mine, backed by the Pekuakamiulnuatsh First Nation.
Technical Brief
- Open-pit scenario targets 35,200 t Nb and 4,200 t Ta contained in measured + indicated.
- Inferred inventory adds 15,300 t Nb and 1,700 t Ta, supporting potential mine-life extensions.
- Site lies ~450 km north of Montreal in the Lac Saint-Jean region, affecting logistics and power options.
- Metallurgical testwork has already produced high-purity niobium and tantalum oxides, de-risking downstream processing design.
- C$500,000 Quebec grant is earmarked specifically to optimise hydrometallurgical flowsheets for Nb-Ta recovery.
- NioBay’s strategy is to offset low head grades with high-volume mining, leveraging large low-grade inventories.
- A 2023 tantalum-rich discovery north of the main zone could materially improve by-product credits and cut unit costs.
- Cooperation agreement with the Pekuakamiulnuatsh First Nation (2023) underpins permitting and potential equity participation structures.
Our Take
Within our 1266 Mining stories, niobium and tantalum appear in only 11 keyword-matched pieces, so Crevier positions NioBay in a relatively uncrowded critical-minerals space compared with gold or base metals in Quebec.
The envisioned 20-year life and relatively modest annual revenue range at Crevier suggest it will likely appeal more to strategic offtakers or downstream users of niobium–tantalum than to majors seeking large-scale standalone cash engines.
With measured and indicated grades of 0.17% niobium and 202 ppm tantalum, Crevier sits in the lower- to mid-grade band of hard-rock niobium–tantalum projects in our database, which increases the importance of low-cost logistics from Lac Saint-Jean and disciplined operating costs to stay competitive.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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