CRITICAL MINERAL COMPANIES · RESEARCH
Tantalum companies & projects in Ontario
Capacitors, chemical equipment and high-performance alloys. Explore 3 documented tantalum assets in Ontario, their companies, source classifications and related regional opportunities.
Asset counts by province / state · select a region
Canada’s mapped coordinates come from NRCan’s 2025 inventory. U.S. assets are mapped by state using USGS’s June 2026 release. Asset counts describe directory coverage.
MINERAL EXPOSURE
Ontario at a glance
SUPPLY-CHAIN ACTIVITIES
Where assets fit
One asset can report several minerals. An organization may participate in multiple assets. Activity grouping describes the source record, and does not confirm current production, commercial availability or investment readiness.
THE ASSET INVENTORY
Projects, mines & facilities
| Project / facility | Minerals | Region | Source classification |
|---|---|---|---|
| Pakeagama Lake ↗Frontier Lithium | Cesium · Lithium · Niobium · Rubidium | OntarioCanada | Advanced projectActive · 2025-12-31 |
| Separation Rapids ↗SCR-Sibelco N.V. | Lithium · Tantalum | OntarioCanada | Advanced projectActive · 2025-12-31 |
| Seymour Lake (Root Lake) ↗Green Technology Metals Limited | Lithium · Tantalum | OntarioCanada | Advanced ProjectActive · 2025-12-31 |
CORPORATE FOOTPRINT
Companies & operators
Avalon Advanced Materials ↗
Lithium · Niobium · Rare earths · Tantalum · Tin
Frontier Lithium ↗
Cesium · Lithium · Niobium · Rubidium · Tantalum
Green Technology Metals Limited ↗
Lithium · Tantalum
SCR-Sibelco N.V. ↗
Lithium · Tantalum
CONTINUE YOUR RESEARCH
Mineral sectors in Ontario
Research sources
- Natural Resources Canada — critical minerals inventory ↗Inventory: 2025-12-31 · Checked 2026-09-10
Each asset profile includes its source references and dates. Read the coverage, data licences and review methodology ↗.