The restart marked exactly a century since the mine first went into production.
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.
Most mining firms rely on their own diesel supplies to extract iron ore, diamonds, rutile and bauxite in the resource-rich country.
The miner may cut its labor costs by 10%, which could involve layoffs among its 35,000 staff.
