Ontario Mineral Inventory

The Ontario Mineral Inventory (OMI) database (previously known as the Mineral Deposit Inventory or MDI database) provides an overview of mineral occurrences in the province of Ontario. It contains information on location, geological environment, exploration history of metallic and industrial mineral occurrences, as well as some building stone and aggregate sites. Occurrences are categorized by their status (e.g., producing mine, developed prospect with reserves or resources, mineral occurrence, etc.). When available, current and historical production and resource data also are included.

Read the OMI description page for more information.

This data is best viewed using Google Earth or similar Keyhole Markup Language (KML) compatible software. For instructions on how to use Google Earth, read the Google Earth tutorial.

[KML]: Keyhole Markup Language [OMI]: Ontario Mineral Inventory

Ministry contact: ndmminister@ontario.ca

Additional information

Tags: Economy and Business Economy and Business

Environment and Nat... Environment and Natural Resources

Rural and north Rural and north
Geographic coverage: Ontario
Source URL/Address: https://www.hub.geologyontario.mines.gov.on.ca/pages/mineral-inventory
Last Validated Date: June 4, 2026
Update frequency: Monthly