Oroco Resource Corp.
TSX VENTURE : OCO

Oroco Resource Corp.

September 17, 2009 16:48 ET

Oroco Second Phase Drilling Verifies 2.0 Kilometer Mineralized Structure

VANCOUVER, BRITISH COLUMBIA--(Marketwire - Sept. 17, 2009) - Oroco Resource Corp. (TSX VENTURE:OCO) ("Oroco" or "the Company") is pleased to announce the progress on and results from its Cerro Prieto Project in Sonora State, Mexico.

Since beginning the Phase 2 drill program on August 9th, 2009, the two drills have completed approximately 2000 meters of drilling in ten holes. Six of the holes have been drilled immediately to the north of the 2008 Phase 1 drill locations at 100 meter intervals along strike and to depth with the intent of adding resources in the oxide zone. The remaining four drill holes have been completed on the claims optioned from Yamana Gold Inc. further north along strike with the objective of extending the overall length of the Cerro Prieto mineralized structure.

Drill hole locations plotted on a longitudinal section of Cerro Prieto may be viewed at http://www.orocoresourcecorp.com/projects-Cerro-Prieto-Project-Maps-and-Sections.html.

Highlights of the Phase 2 drilling to date include:

1. All holes completed to their target depth have intersected a strongly mineralized zone, therefore establishing a drilled strike length of two kilometers;

2. CP025 intersected 53.1 meters of mineralization with greater than 1% zinc and anomalous gold, silver and lead values;

3. CP026 intersected 15.6 meters with 0.324 g/t Au and 65.2 g/t Ag including a 6.2 meter section with 0.686 g/t Au, and 156.2 g/t Ag;

4. CP027 intersected a 13.5 m section averaging 0.826 g/t Au and 10.2 g/t Ag including a 3.1 meter section with 2.777 g/t Au and 26.2 g/t Ag; and

5. CP029 intersected 7.0 meters averaging 1.464 g/t Au including 1 meter that assays 9.070 g/t Au.

CP025 was drilled under 2008 holes CP020 and CP021 which both intersected sections of highly anomalous mineralization. The paucity of gold and silver and abundance of base metals points to the vertical zoning of the deposit.

CP026 was drilled 100 meters north along strike of the section with CP025 and intersected the zone approximately 100 meters below surface.

CP029 was drilled to intersect the mineralized zone 100 meters below CP026.

CP027 was drilled 100 meters north along strike of CP026 and also intersected the zone approximately 100 meters below surface.

CP028 was drilled under very high surface samples on the Yamana option as outlined in Oroco's press release dated August 11, 2009. The hole failed to intersect the target because of poor drilling conditions and was redrilled as CP030.

Assays have been received for four holes and the highlights are presented in the following table.



Significant Intersections from Cerro Prieto Phase 2 Drill Results

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Hole To Apparent True Au Ag Pb Zn
No From (m) (m) Thickness Thickness (g/t) (g/t) (%) (%)
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CP025 219.0 272.1 53.1 34.5 0.126 4.2 0.19 1.01
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222.0 266.5 44.5 28.9 0.137 4.9 0.22 1.16
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223.5 253.0 29.5 19.2 0.148 7.1 0.29 1.45
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CP026 131.0 146.6 15.6 14.0 0.324 65.2 0.10 0.28
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incl 140.4 146.6 6.2 6.0 0.686 156.2 0.11 0.25
--------------------------------------------------------------------
and 139.0 143.5 4.5 4.3 1.030 82.9 0.11 0.24
--------------------------------------------------------------------

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CP027 82.5 96.0 13.5 12.2 0.826 10.2 0.09 0.22
--------------------------------------------------------------------
incl 87.0 93.5 6.5 5.9 1.663 19.1 0.14 0.25
--------------------------------------------------------------------
incl 87.9 91.0 3.1 2.9 2.777 26.2 0.20 0.25
--------------------------------------------------------------------

--------------------------------------------------------------------
CP028 NO ASSAYS
--------------------------------------------------------------------

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CP029 187.0 194.0 7.0 7.0 1.464 2.5 0.18 0.48
--------------------------------------------------------------------
incl 188.5 189.5 1.0 1.0 9.070 5.3 0.25 0.64
--------------------------------------------------------------------

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Oroco is pleased that the results verify that the mineralized zone extends to the north and maintains a significant thickness. The drilling completed in 2008 enabled the company to complete a resource estimate from line 150N to line 750N (a distance of 600 meters) and identified the mineralized zone in drilling as far north as line 1050N in step out hole CP023. Visual results from the holes drilled on the ground optioned from Yamana also indicate that the faulting, shearing and brecciation that characterize the zone are all present through line 2150N.

The mineralized zone has now been identified in drilling over a total distance of two kilometers and is still open, within a 17.5 kilometer strike length, in both directions.

About Oroco

Oroco is a Canadian-based mineral exploration company with its primary focus on the accelerated development of the gold bearing oxide zones of its Cerro Prieto project, a polymetallic (Au-Ag-Pb-Zn) project in Sonora State, Mexico.
The Cerro Prieto project consists of the 100% owned, 2,723 ha, San Felix, San Francisco and Cerro Prieto concessions and the 4,120 ha of the connecting Argonauta 5 Fraccion 1 concession to which the Company holds an option to purchase (see May 14, 2009 news release). During the first field season in 2008, the Company drilled 5,975 meters of core and tabled a NI 43-101 compliant resource estimate together with the results of a preliminary metallurgical study (See May 11, 2009 news release). The Company is moving the Cerro Prieto project forward with the rapid development of mineral resources, further metallurgy studies and the development of a preliminary assessment by an independent mining engineering firm.

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. He 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.

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

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