Oroco Announces 425 Meter Stepout To Mineralized Zone.

September 9, 2008

VANCOUVER, BRITISH COLUMBIA – (Marketwire – September 9, 2008) – Oroco Resource Corp (OCO – TSX-V) is pleased to announce the results from a surface trenching program on the Cerro Prieto property, located in Sonora State, Mexico.


The trench cut what is believed to be an extention of the Cerro Prieto mineralized zone 425 meters north of the current 6,000 meter Phase One diamond drill program. The 425 meter strike length between the most northerly drill section of that program and the trench is virtually unexplored with the exception of a few small historical pits that partially exposed minor veining and alteration.

The trench exposes veining and brecciated veining comparable to that seen in drill core from the mineralized zone in the area of current drilling to the south. The assays for the full length of the sampled trench averages 0.401 g/t Au, 79.7 g/t Ag, 0.32% Pb and 0.47% Zn over a true thickness of 36.3 meters. Within that section, a higher grade silver zone assayed 163.4 g/t Ag, 0.327 g/t Au, 0.34% Pb and 0.30% Zn over a true thickness of 13.5 meters. Also within the trench, a separate section of higher grade lead and zinc averages 0.57 g/t Au, 25.2 g/t Ag, 0.57% Pb and 1.30% Zn over a true thickness of 6.0 meters. Mineralization is open on either end of the trench and a program of detailed trenching, mapping and sampling has begun both to the north and south of the trench.

The company is pleased to note the consistency of the true thickness and average grade of the trench with that of the Phase One drill hole intersections for which assays have been previously reported. The trench is located on section 1075 N, 425 meters north of the northern most drill section and 925 meters north of the southern-most drill section of the current drill program. For a plan view map showing the location of the drill hole sections and the trench, and a longitudinal section showing the drill hole intercepts.

The Cerro Prieto polymetallic project is located in Sonora State, Mexico and consists of three mineral concessions totaling 2,508 hectares. Oroco holds a 100% interest in these concessions. In April of this year a Phase 1 drill program commenced and at the completion of the this program (6,000 meters in approximately 25 holes) the mineralized zone will have been drill tested vertically at 100 meter centers along a strike length of at least 600 meters to a depth of 400 meters allowing the calculation of an initial estimation of resources.

Qualified Person

Kenneth R. Thorsen, B.Sc., P. Geo., is a director of the company and is a ‘qualified person’ for the purposes of National Instrument 43-101 Standards of Disclosure for Mineral Properties of the Canadian Securities Administrators and has verified the data (including sampling, analytical and test data) and prepared or supervised the preparation of the information contained in this news release.

Quality Assurance & Control

The Company has implemented a quality assurance and control (QA/QC) program to ensure sampling and analysis of all exploration work is conducted in accordance with the best possible practices. Split core is transported to the ALS Chemex laboratory in Hermosillo where it is crushed and pulverized, with pulps sent to the ALS Chemex laboratory in Vancouver, B.C. for assaying. The other half of the core is retained for future assay verification. The QA/QC policy includes the chain of custody monitoring, insertion of blanks, standards and duplicates in the initial samples submitted. The laboratory provides an additional internal control program.

Stephen Leahy



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These historical resource estimate models are based upon historical resource estimates prepared by John Thornton in 2011. While, in the opinion of Dane A. Bridge, author of the revised NI 43-101 standard technical report, Geology, Mineralization and Exploration of the Santo Tomas Cu-(Mo-Au-Ag) Porphyry Deposit, Sinaloa, Mexico dated April 21, 2020 (the “Report”), reliable estimation practices were used, in order to upgrade or verify the historical estimations, resampling and assay of historical drill samples, twinning of historical drill holes, and a new program of regularly spaced drilling is required. No qualified person has undertaken sufficient work to classify the current mineral resources or mineral reserves upon which these models are based and the Company is not treating the estimates as current estimates of the mineral resources. The Company gives no assurance that either these models or the historical resource estimates upon which they are based are accurate, and does not undertake any obligation to update the models or to release publicly any update or revisions of the resource estimates except as required by applicable securities law. The reader is cautioned not to rely upon these models or the historical resource estimates upon which they are based.

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