Oroco Resource Corp. (TSX-V: OCO, OTC: ORRCF) announces assay results from drill holes S004 through S018 (8,547 m of drilling) of its South Zone drilling program at its Santo Tomas property located in northwestern Mexico (see Table 1, Figure 3 and the South Zone cross-sections, attached). To view an interactive 3D model that includes the South Zone results announced today, please use the following link: https://vrify.com or visit Oroco’s website: www.orocoresourcecorp.com.
DRILL RESULT HIGHLIGHTS:
Richard Lock, Oroco’s CEO, commented: “We are extremely encouraged by our current drilling results. They are beginning to confirm the mineralization which was indicated by the historical drilling in the South Zone, therefore adding to the impressive results from our North Zone drilling program. We anticipate that these results will come together very positively in support of our Preliminary Economic Assessment, which is expected in the second quarter of 2023.”
SOUTH ZONE PROGRAM
The Company has now completed a 21-hole South Zone drill program (12,154 m) designed to confirm and test the South Zone mineralized structures, with the assay results up to drill hole N018 now being reported, and those of holes S019 through S021 currently pending.
All drill holes tested the deposit approximately perpendicular to its structural attitude. Core intervals are within approximately 10% of true thickness. Assay results and cross-sections of all South Zone, North Zone and Brasiles Zone drill holes released to date are available at the Company’s website.
Historical drilling, surface geological mapping, and the Dias Geo 3D Induced Polarization survey have defined near-surface mineralization projected to 400 m below the surface along 2,000 m of strike length in the South Zone.
The South Zone is only partly tested by the current drill program. However, the historical drilling and the 2022-2023 drill program conclusively define a NNW to NNE trending zone of faulting, Laramide-age intrusion, hydrothermal breccias and mineralization along the entire two kilometer corridor south of drill hole N034 of the North Zone.
DRILLING RESULTS – MIDDLE SEGMENT OF THE SOUTH ZONE
DRILLING RESULTS – SOUTHERN SEGMENT OF THE SOUTH ZONE
The southern segment of the South Zone has a contrasting geology to the North Zone. The North Zone is a body of sheeted, west-dipping Laramide-age intrusive dikes and mineralization. Drilling of the southern segment has intersected similar west-dipping intrusions and mineralization but also cut a slightly younger overprinting of mineralized hydrothermal breccia bodies and a wide body of stockwork vein and fracture mineralization. Grades are comparable to North Zone and locally extend over wider intervals than seen in the North Zone to date.
Table 1: Significant Assay Intervals in the 2021-2023 Program, Drill Holes S004 to S018:
|Cu %||Mo %||Au g/t||Ag g/t*||CuEq %|
Cu Equivalent (CuEq) % = Cu % + (Mo %*3.75) + (Au ppm*0.752). The commodity prices (3 yr Average) used are in $US: Cu $3.20 /lb, Mo $12.00 /lb, and Au $1,650.00 /troy oz. Ag values are not used in the CuEq calculations.
NORTH ZONE PROGRAM
The Company is continuing its horizontal drilling from the base of the Santo Tomas ridge testing the southern 400 m of the North Zone, south of hole N038, to depths of 300 to 500 m below surface. This previously untested area of the North Zone also has the potential to add significant tonnage to the resource estimate being prepared in support of the planned Preliminary Economic Assessment.
TECHNICAL INFORMATION AND QUALITY CONTROL / QUALITY ASSURANCE
The historical drilling data employed in this current exploration program was the subject of Data Verification procedures cited in the current Technical Report. Additional drill collar verifications were performed in the current program, and collar locations fit closely to the 2021/2022 survey control. Appropriate QA/QC protocols governed geological logging, core sampling, sample preparation, analyses, and security during the current program, including quality controls with duplicates, standards, and blanks. Samples were submitted to the Mexican division of ALS Limited in Hermosillo, Mexico, for sample preparation to pulps. Sample pulps are then sent to ALS Canada Ltd. in Vancouver, Canada, for analysis. Total copper and molybdenum contents are determined by four-acid digestion with AAS finish. Gold was determined by fire assay of a 50-gram charge, or alternately, of a 30-gram charge (1 Assay ton).
Mr. Paul McGuigan, P. Geo., of Cambria Geosciences Inc., a “Qualified Person” (as defined in NI 43-101 –Standards for Disclosure for Mineral Projects) and a senior consulting geoscientist to the Company, has reviewed and approved the technical disclosures in this news release. The Company strictly adheres to CIM Best Practices Guidelines in conducting, documenting, and reporting the exploration activities on its projects.
The Company holds a net 85.5% interest in the collective 1,172.9 ha Core Concessions of the Santo Tomas Project in NW Mexico. The Company also holds an 80% interest in 8,154.3 ha of mineral concessions surrounding and adjacent to the Core Concessions (for a total project area of 23,048 acres). The Project is situated within the Santo Tomas District, which extends from Santo Tomas up to the Jinchuan Group’s Bahuerachi project, approximately 14 km to the northeast. Santo Tomas hosts a significant copper porphyry deposit defined by prior exploration spanning the period from 1968 to 1994. During that time, the property was tested by over 100 diamond and reverse circulation drill holes, totalling approximately 30,000 meters. Based on data generated by these drill programs, a historical Prefeasibility Study was completed by Bateman Engineering Inc. in 1994.
The Santo Tomas Project is located within 160 km of the Pacific deep-water port at Topolobampo and is serviced via highway and proximal rail (and parallel corridors of trunk grid power lines and natural gas) through the city of Los Mochis to the northern city of Choix. The property is reached by a 32 km access road originally built to service Goldcorp’s El Sauzal Mine in Chihuahua State.
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