Oro Silver Resources Ltd.

Oro Silver Resources Ltd.

April 22, 2008 09:30 ET

Oro Silver Surface Sampling Returns 1,062 g/t Silver at Vetagrande Mine, Zacatecas, Mexico

VANCOUVER, BRITISH COLUMBIA--(Marketwire - April 22, 2008) - Oro Silver Resources Ltd. ("Oro Silver") (TSX VENTURE:OSR) has received additional encouraging results from its systematic surface sampling and mapping program at the Vetagrande mine, Zacatecas, Mexico. The results further demonstrate the potential for high-grade silver from at least five sub-parallel veins on the property, including the Veta Grande vein that extends over 1.9 kilometres in length. Oro Silver is currently focusing on defining and developing surface and underground targets to be tested by drilling.

Highlights of results received during the month:

Width Ag Au Pb Zn Cu
Vein (m) (g/t) (g/t) (%) (%) (%)
Tiburcio 0.12 555.4 0.12 0.14
La Grab 306.2 0.10
Predilecta --------------------------------------------------
Grab 821.0 0.19 0.33
Veta Grab 950.7 0.07 0.15
Grande --------------------------------------------------
Grab 140.0 0.67 2.85 0.21
Grab 246.6 0.06 0.01
3.00 250.5
Armado --------------------------------------------------
Grab 307.3
0.30 440.5 0.12
Grab 1,062.8
0.27 450.8 0.07 0.08 0.01
San Jose --------------------------------------------------
Grab 340.9
0.12 732.6 0.11

Results obtained by Oro Silver continue to confirm historic grades reported by Industrias Penoles S.A. de C.V. during the 1980's. The results suggest potential for high-grade silver and base metals at the surface associated with multiple parallel vein zones. The veins have experienced minimal past exploration and mining. Sample locations are shown on the accompanying plan map.

The ongoing exploration program includes completing a minimum of 5,000 metres of reverse circulation and diamond drilling to develop a resource at the Vetagrande mine. Drilling is expected to commence in the third quarter of 2008.

Oro Silver's exploration program is supervised by Mr. Herve Thiboutot, P. Eng. and Vice-President of Exploration and Development, and Dr. Charles Tarnocai, Chief Geologist. Mr. Thiboutot is a qualified person as defined by National Instrument 43-101. Mr. Thiboutot has reviewed the content of this press release.

Quality Control

Oro Silver maintains a strict quality control program. All samples were submitted directly to Inspectorate de Mexico, S.A. de C.V., for preparation in Mexico, and analysis in Reno, Nevada. Analysis was conducted on 1 assay ton samples, with standards and blanks inserted every 30 samples. Analysis of gold was by fire assay, with a gravimetric finish on samples exceeding 3 g/t gold. Analysis of silver was by atomic absorption, with a gravimetric finish on samples exceeding 200 g/t silver. Samples exceeding 10,000 part per million for copper, lead, or zinc were analyzed by a gravimetric finish. Triple acid digestion was used on all samples.

About Oro Silver

Oro Silver is a silver exploration company pursuing early and advanced stage silver-based opportunities primarily in the western hemisphere. The company is focused on (i) developing resources and optimizing milling processes at its El Compas and Vetagrande Mine projects in Zacatecas, Mexico, and (ii) completing additional strategic acquisitions. Oro Silver's strategy is to become a mid-tier silver producer through an aggressive acquisition and development plan focused on advanced-stage projects with known silver resources that exhibit potential for expansion.


Gregory Cox, President and CEO

Some statements in this release may contain forward-looking information. These statements include, but are not limited to, statements with respect to future exploration, development and production activities and future expenditures. These statements address future events and conditions and, as such, involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the statements. Such factors include, among others, the time and success of future exploration, development and production activities and the timing and amount of expenditures.

To view Figure 1 please click on the following link: http://media3.marketwire.com/docs/OSR0422.pdf

The TSX Venture Exchange does not accept responsibility for the adequacy or accuracy of this release.

Contact Information

  • Oro Silver Resources Ltd.
    Gregory Cox
    President and CEO
    (604) 646-1581
    (604) 642-2411 (FAX)
    Website: www.orosilver.com