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Marathon Platinum Group Metals and Copper Mine Project

Marathon PGM Corporation is proposing to construct, operate and decommission an open pit platinum group metals and copper mine approximately 10 km from Marathon, Ontario. The proposed project would include three open pits, an ore processing plant, tailings and mine rock storage facilities, site access roads, a 7 km power transmission line, explosives factory and magazines, water management facilities, ancillary mine infrastructure and associated activities. The rate of production would be approximately 22,000 tonnes per day with a proposed operating mine life of approximately 11.5 years.


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 project.

Latest update

October 31, 2014 - The Minister of the Environment has disbanded the Joint Review Panel established to conduct the environmental assessment of the proposed project, as the proponent has indicated that it does not plan to proceed with the project at this time.

October 29, 2014 - The proponent provided a project update on September 2, 2014, which indicated that it has decided not to move forward with the Project at this time and cannot provide any further timelines.


List all documents


  • Marathon Platinum Group Metals and Copper Mine Project
  • Impact Assessment Agency of Canada
  • 160 Elgin Street, 22nd floor
  • Ottawa, ON, K1A 0H3
  • Telephone: 613-957-0700 or 1-866-582-1884
  • Fax: 613-957-0941
  • Email:

  • Location

    • Marathon (Ontario)
  • Project Type

    • Mines and Minerals
  • Status

    In progress
  • Start Date

  • Proponent

    Stillwater Canada Inc.
  • Authorities

    • Impact Assessment Agency of Canada
  • Assessment Type

    Environmental assessment by Review Panel under CEAA 2012
  • Reference Number

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