Announcement • Aug 06

Oroco Resource Corp. Reports Assay Results from Phase 2 Resource Drilling Program At Santo Tomás Copper Project

Oroco Resource Corp. reported the third set of assay results from its Phase 2 resource drilling program focused on the South Zone at its Santo Tomás copper project, Choix, Sinaloa, Mexico. Results are reported for drill holes S027 and S030 through S034. The Company continues drilling with three rigs on site. Holes S031 and S034 confirmed the local westward extension of mineralization beyond the current inferred block model limits in the central western portion of the South Zone. Hole S031 is a hole drilled westwards at -65 degrees from the same pad as S029. The hole intersected near-surface mineralization and drilled out of inferred material, extending newly identified mineralization westwards. Mineralized outcrops to the west of the intercept suggest a wedge of mineralization extending up to 330m in that direction. Hole S033 was drilled at -50 degrees eastwards from a pad located 50m to the east of S034. Intersected mineralization included 26.48m @ 0.90% Cu /1.18% CuEq from a depth of 48.0m. Additional intercepts are included below. Hole S034 was collared 80m north of S031 and drilled westwards at -60 degrees. The hole displayed mineralization similar to that observed in S031 and, as with S031, intersected mineralization outside the inferred material. Surface mineralization to the west again supports a wedge of additional mineralization to the west. Hole S027 is a vertical hole drilled from the same pad as S030 and S032. The mineralization observed in this hole, combined with results from S032 and S030 and surface expressions of copper oxides, essentially defines the southern limit of the South Zone. Holes S030 and S032 have locally defined a southern limit of mineralization in the South Zone. Hole S030, located on the same pad as S032, was drilled at -50 degrees towards 280°. A 49m intercept of mixed oxide-sulphides was logged from 12m depth. Total copper assay over the interval returned 0.80% CuTot. Additional sulphide mineralization below this interval is included in Table 2. Hole S032 is located on the southernmost pad in the South Zone (S027 pad) and was drilled at -45 degrees towards 150°. A mixed oxide-sulphide zone was observed from 0 to 49m depth. The total copper assay over the interval 36 to 49m returned 0.80% CuTot and 0.31% CuSol (total and soluble copper respectively). Sulphide mineralization below this interval is reported in Table 2. Soluble copper assays for Hole S027 were received and returned a 10.5 m mixed oxide-sulphide intercept from 13.5m depth with 0.53% CuTot and 0.17% CuSol. At this stage, there is no technical report that incorporates a plan for a copper leach recovery circuit. The Company has therefore elected not to report a copper equivalent grade for significant intervals of mixed oxide and sulphide mineralization. IT IS IMPORTANT TO NOTE that Phase 2 is designed primarily to convert Inferred resources to the Indicated resource classification in the South Zone and to collect geotechnical, hydrogeological, and additional metallurgical data required for Pre-Feasibility Study mine planning. Resource drilling in the South Zone is almost complete. Rigs will thereafter be moved to “the Gap” in the pillar area between the North and South Zones. The Pre-Feasibility Study is targeted for release in Second Quarter/Third Quarter 2027. Table 1: Phase 2 Drill Holes S027, S030, S031, S032, S033 and S034. Hole S027: Southern most drill pad. Testing southern end of the inferred blocks in the 2024 Block Model. Hole S030: Southern most drill pad. Testing southern end of the inferred blocks in the 2024 Block Model. Hole S031: Testing western limits of inferred blocks. Mineralization based on drill hole results and surface mineralization 330m to the west suggests the potential for additional tonnage. Hole S032: Southern most drill pad. Testing southern end of the inferred blocks in the 2024 Block Model. Drill holes S027, 030 and 032, all intercepted variable copper oxide mineralization in a mixed oxide/sulphide zone. Southern limit now defined. Hole S033: Infill hole to the east of S034. Drilling supports the 2024 block model with an additional higher grade near surface intercept of 26.48m @ 0.90% Cu /1.18% CuEq from 48m depth. Hole S034: Testing western limits of inferred blocks. Mineralization based on the drill hole results and surface mineralization 330m to the west also indicating potential for additional tonnage. Metal recoveries are grade-based by individual assay in the reported intervals and vary accordingly. In these intervals, Cu recovery ranges from 82-89%, Mo 50-60%, Au 30-85% and Ag 35-67%. Au and Ag recoveries are dependent on copper and sulphur grades. Drill hole intervals reporting sulphide and non-sulphide copper (oxide) results are not reported with a copper equivalent. Significant Intervals comprise intervals = 10m of = 0.15% Cu, but may include assay intervals of = 4m of = 0.05% Cu. This continues the practice of significant interval reporting applied during Phase 1, including News Releases and the 2024 Preliminary Economic Assessment. CuTot is the total contained copper % via ME-ICP62, four-acid digest. CuSol is the soluble copper assay via Cu-AA05 using a sulphuric acid leach conducted on intervals exhibiting oxidation. All intervals are downhole drill core lengths. True widths will be confirmed when Phase 2 results are incorporated into the updated geological and resource models. Where holes are drilled approximately perpendicular to the interpreted structural attitude of the mineralization, core intervals are expected to approximate true thickness. Copper equivalent grades in this release are calculated using the variable metal recovery curves from Chapter 13 of the Company’s 2024 Technical Report (“Santo Tomás Copper Project, Sinaloa, Mexico — Technical Report on a Preliminary Economic Assessment”), filed on SEDAR+ August 2024 and the metal price deck in Table 3, reflecting 12-month actual trailing average prices to April 30, 2026. This price deck differs from that used in the Preliminary Economic Assessment. Copper equivalent grades in this release are not directly comparable to CuEq grades reported in the Company’s 2024 Indicated and Inferred Resource Summary Table or in earlier drill-result news releases prior to 2024, which used different metal price assumptions and CuEq methodologies.

Oroco Resource Corp. Stock Price

OCO Share Price Performance

OCO Community Narratives

Trending Discussion

Recently Updated Narratives

Snowflake Analysis

Oroco Resource Corp. Key Details

About OCO

Recent OCO News & Updates

Oroco Resource Corp. Reports Fourth Batch Of Assay Results From Phase 2 Resource Drilling Program In The South Zone Of The Santo Tomás Copper Project

Companies Like Oroco Resource (CVE:OCO) Are In A Position To Invest In Growth

Oroco Resource Corp. Reports Assay Results from Phase 2 Resource Drilling Program At Santo Tomás Copper Project

Recent updates

Oroco Resource Corp. Competitors

Mining Americas

Jaguar Mining

Silver Tiger Metals

Heliostar Metals