VANCOUVER, Canada, April 22, 2026 (GLOBE NEWSWIRE) — Oroco Useful resource Corp. (TSX-V: OCO, OTCQB: ORRCF) (the “Company” or “Oroco”) is happy to offer an replace on the Part 2 drill program at present underway at its Santo Tomás copper challenge in northwestern Mexico.
Highlights
A second diamond drill rig has been mobilized and is now lively within the South ZoneSix holes have been accomplished so far, with two extra at present in progress. Core from two holes has been submitted for assay.Drilling continues to focus on areas recognized within the Part 2 plan in help of an up to date Mineral Useful resource Estimate (“MRE”) and Pre-Feasibility Examine (“PFS”)
Second Rig Mobilization
Oroco’s Govt Chairman, Craig Dalziel, commented: “Adding a second rig is an important operational milestone and keeps us on pace toward an updated MRE and a Pre-Feasibility Study. Every metre we drill increases the value of one of the largest undeveloped copper porphyry projects in the Americas.”
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Core from drill holes STPH2-22 and STPH2-23 has been logged, sampled, and submitted for assay. Assay outcomes can be reported as soon as obtained, validated, and compiled in accordance with the Firm’s disclosure requirements.
Function of the Part 2 Program
The Part 2 drill program is designed to help the upgrading of the classification of the mineral useful resource within the South Zone by a mixture of infill and affirmation drilling. This work is being superior in parallel with complementary PFS-level workstreams, together with hydrogeological, geotechnical, and metallurgical applications.
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These applications are designed to provide the inputs required for an up to date Mineral Useful resource Estimate and, in the end, a Pre-Feasibility Examine on the Santo Tomás Venture, constructing on the revised MRE and up to date Preliminary Financial Evaluation filed in August 2024.
Concerning the Santo Tomás Venture
Oroco holds a web 87.0% curiosity within the 1,173-hectare Core Concessions and an 80% curiosity in surrounding concessions at Santo Tomás, a copper porphyry challenge in Sinaloa State, Mexico. The Venture was examined by historic drilling from 1968 to 1994 and by Oroco’s Part 1 program, which totaled 48,481 metres in 76 diamond drill holes and supported the revised Mineral Useful resource Estimate and up to date Preliminary Financial Evaluation filed in August 2024.
The August 2024 MRE, ready by SRK Consulting (U.S.), Inc., outlined an Indicated Useful resource of 540.6 Mt at 0.37% CuEq (0.33% Cu) and an Inferred Useful resource of 530.3 Mt at 0.35% CuEq (0.31% Cu) throughout the North and South Zones. The up to date Preliminary Financial Evaluation, ready by Ausenco Engineering USA South Inc., contemplates a staged open-pit operation ramping from 60,000 t/d in Yr 1 to 120,000 t/d by Yr 8 over a 22.6-year lifetime of mine, producing an after-tax NPV₈% of US$1.48 billion and an after-tax IRR of twenty-two.2%. Each research can be found at www.orocoresourcecorp.com and on SEDAR+ at www.sedarplus.ca.
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