Marban Gold Mine Project

O3 Mining Inc. is proposing the construction and operation of a new open-pit gold mine located in the Dubuisson Sector of Val-d'Or, in Quebec. As proposed, the Marban Mining Project would include the mining of three open pits, the construction of a new ore processing plant, new waste rock, tailings and overburden stockpiles, the relocation of an existing road and the diversion of a permanent watercourse. The project would have a maximum ore production capacity of 16,400 tonnes per day and a 10-year life span.


This map is for illustrative purposes. The markers represent the approximate locations based on available data. More than one marker may be identified for a given assessment.


Latest update

January 20, 2023 — The Impact Assessment Agency of Canada issued the Summary of Issues to the proponent on January 6, 2023, for the preparation of the Detailed Project Description and Response to the Summary of Issues.

January 11, 2023 — The participant funding application period has closed. The Impact Assessment Agency of Canada is reviewing the funding applications.


Key documents

Key documents
Document Number Document Title File Date
28 Summary of Issues PDF (460 KB) January 6, 2023
3 Public Notice - Comments Invited on the Summary of the Initial Project Description - December 1, 2022
2 Summary of the Initial Project Description PDF (1.9 MB) December 1, 2022
1 Description initiale de projet (French Only) PDF (16.7 MB) December 1, 2022


Marban Mining Project
Impact Assessment Agency of Canada
901-1550, Estimauville Avenue
Québec, Quebec G1J 0C1
Telephone: 418-649-6444

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