The restart marked exactly a century since the mine first went into production.
The company has signed an additional LOI with Export Development Canada worth $300 million.
The company changed its board of directors and plans to spin out non-core assets La Verde, Capricho, and Paco Orco into a new company.
The Canadian miner has reportedly engaged law firm Thomson Geer to finalize a prospectus for listing in the ASX before Christmas.