Oroco Drills 234.6 metres of 0.52% CuEq at Santo Tomás

Oroco reports strong copper drill results and completes South Zone drilling at Santo Tomás.

What the company is saying

Oroco Resource Corp. is emphasizing the completion of South Zone resource drilling at the Santo Tomás copper project in Mexico, highlighting a fifth batch of Phase 2 assay results from ten drill holes. The company details significant intercepts, such as S045 with 234.6 metres at 0.52% CuEq and S049 with 86.1 metres at 0.60% CuEq, positioning these as evidence of grade continuity and potential for resource expansion. CEO Charles Cryer frames the results as strengthening optimism for an expanded resource model and improved project viability, while explicitly noting that the next economic assessment will incorporate these new data. The company also references broader permitting momentum in Mexico, citing that 84% of 185 mining environmental applications were resolved by June 30, 2026, to suggest a favorable regulatory environment. Oroco is transparent about technical details, including the use of updated metal price decks (US$5.00/lb Cu, US$25.75/lb Mo, US$4,070/oz Au, US$56.50/oz Ag) and variable recovery rates, and acknowledges that true widths are not yet confirmed. The tone is confident but measured, with forward-looking statements caveated by the need for further modeling and economic analysis.

What the data suggests

The disclosed data show that 50 holes totaling 15,263.2 metres have been drilled in Phase 2, with South Zone drilling now complete and three rigs still operating. Key intercepts include S045 (234.6 m at 0.43% Cu, 0.52% CuEq from 174.1 m), S049 (86.1 m at 0.51% Cu, 0.60% CuEq from 85.5 m), S053 (84.2 m at 0.50% Cu, 0.58% CuEq from 159.6 m), and S051 (102.3 m at 0.46% Cu from 35.0 m). The intervals are reported as downhole lengths, not true widths, so actual mineable thickness may differ. Sampling to date covers 12,830.1 metres of core and 8,512 samples, including 1,449 QA/QC samples. The copper-equivalent grades are calculated using trailing average prices to April 30, 2026, and variable recoveries (Cu 82–89%, Mo 50–60%, Au 30–85%, Ag 35–67%). No processing route is planned for the high-grade carbonate-hosted mineralization in S050. Permitting data from Mexico's Ministry of Economy indicates a generally improving regulatory climate, but no direct link to Oroco’s permits is disclosed. The technical disclosure is robust, but economic impact and resource conversion remain to be demonstrated in future studies.

Analysis

The announcement provides detailed, specific assay results and operational progress from Oroco Resource Corp.'s Phase 2 drilling at the Santo Tomás copper project. The language is generally proportionate to the evidence, with most claims supported by explicit drill intervals, grades, and sampling statistics. Forward-looking statements are present but are clearly separated from realised results and are appropriately caveated (e.g., 'subject to updated resource modelling'). There is no exaggerated language about imminent production or economic impact, and no large capital outlay is disclosed in this update. The benefits of the drilling program (resource conversion, future economic assessment) are inherently long-term, as is typical for an exploration-stage company. The technical disclosure is robust and credible, with no signs of narrative inflation or overstatement.

Risk flags

• ●Resource conversion risk remains, as the current results are based on downhole intervals and true widths are not yet confirmed; actual mineable tonnage and grade could be lower than reported core lengths suggest.
• ●Economic impact is unproven until a new resource estimate and economic assessment are completed; current grades and widths are promising but do not guarantee project viability or profitability.
• ●Permitting risk persists despite positive sector-wide trends in Mexico, as the company has not disclosed the status of its own project-specific environmental or mining permits.
• ●Technical risk is present in the form of pending assays, the need for updated geological models, and the integration of geotechnical, hydrogeological, and metallurgical data for pre-feasibility study-level planning.
• ●Metallurgical uncertainty exists for certain mineralization styles, such as the carbonate-hosted interval in S050, for which no processing route is currently planned and mineralogical confirmation is required.

Bottom line

Oroco’s latest update delivers detailed and credible drill results from the Santo Tomás South Zone, with several long, moderate-to-high grade copper intercepts and completion of the resource drilling phase in this area. The technical disclosure is thorough, with explicit grades, widths, and sampling statistics, but the economic significance of these results will only become clear once a new resource estimate and economic assessment are completed. The company is transparent about the limitations of the current data, including the lack of true width confirmation and the absence of a processing plan for certain mineralization types. While sector-wide permitting progress in Mexico is encouraging, Oroco’s own permitting status is not specified. Investors should watch for the next economic assessment and updated resource model as the main catalysts. The most important takeaway is that while the drilling results are positive and support the project's potential, the path to value realization is still contingent on future technical and economic milestones.

Announcement summary

(TSXV:OCO, OTCQB:ORRCF) Oroco Resource Corp. reported the fifth batch of assay results from its Phase 2 resource drilling program in the South Zone of the Santo Tomás copper project in Choix, Sinaloa, Mexico. The results cover ten drill holes, including S045, which delivered a 234.6-metre interval of 0.52% CuEq from 174.1 m depth. Phase 2 has now completed 50 holes in the South and Pillar Zones, with 15,263.2 m drilled and three rigs operating at Santo Tomás. South Zone resource drilling is now complete, while Pillar Zone and geotechnical work continue. Highlights include S045: 234.6 m at 0.43% Cu (0.52% CuEq) from 174.1 m; S046: 128.0 m at 0.36% Cu (0.48% CuEq) from surface, with additional mineralization below the 2024 PEA pit; S049: 86.1 m at 0.51% Cu (0.60% CuEq) from 85.5 m; S050: 6.0 m of carbonate-hosted mineralization at 4.18% Zn, 1.71% Pb, 75 g/t Ag, 0.35 g/t Au, and 0.48% Cu from 36.0 m; S051: 102.3 m at 0.46% Cu from 35.0 m; S053: 84.2 m at 0.50% Cu (0.58% CuEq) from 159.6 m; and S056: 95.4 m at 0.29% Cu (0.38% CuEq) from 40.6 m. All intervals are downhole lengths; true widths remain to be confirmed. No processing route is currently planned for the S050 carbonate-hosted mineralization. Drill holes S046, S048, S049, and S053 were among the final holes in the southern quarter of the South Pit, supporting the current PEA block model and higher grades around S018. S046 also returned 26.0 m at 0.31% Cu (0.43% CuEq) from 351.0 m and 14.1 m at 0.23% Cu (0.30% CuEq) from 387.0 m, both below the PEA pit. Drilling along the western edge continued with S051 and S056, with S051 suggesting the pit limit may extend westward and S056 indicating mineralization closer to surface than previously modeled. In the north-central and eastern South Pit, S045 supported block model grades, while S047 confirmed the up-dip extension of weakening mineralization eastward. S050 and S055 in the northeastern quadrant returned sporadic lower-grade copper assays, with S050 intersecting a high-grade carbonate-hosted interval. Table 1 provides detailed drill-hole locations, including S045 at 779,023E, 2,975,149N, 777.8 m elevation, and S046 at 778,950E, 2,974,703N, 716.6 m elevation. Table 2 lists significant copper assay intercepts, such as S045: 174.1–408.7 m, 234.6 m at 0.43% Cu, 0.52% CuEq; S046: 0–128 m, 128 m at 0.36% Cu, 0.48% CuEq; S049: 85.5–171.6 m, 86.1 m at 0.51% Cu, 0.60% CuEq; S053: 159.6–243.8 m, 84.2 m at 0.50% Cu, 0.58% CuEq. CuEq grades are calculated using variable metal-recovery curves and a metal-price deck reflecting 12-month trailing averages to April 30, 2026: US$5.00/lb Cu, US$25.75/lb Mo, US$4,070/oz Au, and US$56.50/oz Ag; actual trailing averages are US$5.05/lb Cu, US$25.74/lb Mo, US$4,070.20/oz Au, and US$56.40/oz Ag. Across these intervals, Cu recovery ranges from 82% to 89%, Mo from 50% to 60%, Au from 30% to 85%, and Ag from 35% to 67%. To date, 12,830.1 m of core has been sampled during Phase 2, through hole S063, representing 8,512 samples: 7,063 core samples and 1,449 QA/QC samples. Mexico permitting momentum is noted, with approximately 84% of 185 mining environmental applications resolved by June 30, 2026, according to ProMinería and Mexico's Ministry of Economy. The company is preparing a follow-up 3D DCIP geophysics program at the Vainilla property after completing a 707 line-kilometre drone magnetic survey over ~3,114 hectares.

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