Oroco Resource to start phase 2 drilling at Santo Tomas

Executive Summary

• Oroco Resource Corp. has mobilized a diamond drill rig to its Santo Tomas copper project in northwestern Mexico to begin Phase 2 drilling.
• The primary objective of this drilling is to upgrade mineral resource classifications in the project's South zone through infill and confirmation drilling.
• The company is simultaneously launching a prefeasibility study (PFS) program involving hydrogeological, geotechnical, and metallurgical testing to advance engineering and reduce technical risk.

Key Details

• Project Location: Santo Tomas copper project, northwestern Mexico.
• Drilling Objective: Support the upgrade of mineral resource classifications in the South zone; refine geological and grade models; increase drilling density for improved confidence in future mine planning and engineering.
• Drilling Strategy: Initial work prioritizes infill and confirmation drilling; additional drills will be added as required.
• Prefeasibility Study (PFS) Components:
  • Hydrogeological: Collection of baseline and operational water data, targeted testing, and integration into water management planning.
  • Geotechnical: Systematic logging of drill core, core orientation, structural data, and collection of parameters for pit slope and infrastructure design.
  • Metallurgical: Additional sample collection for variability, comminution, and process-response testing to PFS standards.
• Recent History: Phase 1 drill program (commencing 2021) totaled 48,481 metres in 76 diamond drill holes, supporting a revised mineral resource estimate and updated Preliminary Economic Assessment (PEA) filed in August 2024.
• Land Package: Net 87.0% interest in 1,173 hectares (core concessions); 80% interest in surrounding concessions.
• Infrastructure Proximity: Located within 170 km of the Pacific deepwater port at Topolobampo; serviced via highway and rail through Los Mochis to Choix.

Notable Quotes

• "The mobilization to the South zone at Santo Tomas marks the restart of a project that is not only of great value to the shareholders of Oroco but is also essential to the future of a local community that, along with the regional government, has been so supportive of the project. We are so very thankful to be located in an area of Mexico where the potential benefits of the Santo Tomas project are so widely appreciated. We look forward to the many contributions, both local and federal, that the success at Santo Tomas is likely to provide." — Craig Dalziel, Chairman