Oro Silver Resources Ltd.
TSX VENTURE : OSR

Oro Silver Resources Ltd.

March 13, 2008 09:30 ET

Oro Silver Reports 1,035.0 g/t Silver From Sampling at Vetagrande Mine, Zacatecas, Mexico

VANCOUVER, BRITISH COLUMBIA--(Marketwire - March 13, 2008) - Oro Silver Resources Ltd. ("Oro Silver") (TSX VENTURE:OSR) has received encouraging results from its ongoing surface and underground channel/chip sampling program at the Vetagrande mine, Zacatecas, Mexico. The sampling demonstrates the potential for high silver grades from four veins on the property, including the Veta Grande vein with over 1.9 kilometres of strike length.

Summary of sample results received to date:

- Veta Grande vein

- 1,035.0 g/t Ag (vein sample over 5 square metres)

- 234.2 g/t Ag, and 0.34 g/t Au (channel over 2 metres)

- 472.7 g/t Ag, 3.0% Zn, and 1.74 g/t Au (vein sample approximately 200 m below surface)

- 159 g/t Ag (surface channel over 0. 4 metres)

- Armado vein

- 406.0 g/t Ag (dump material)

- San Jose vein

- 369 g/t Ag (channel over 0.75 metres)

- 413.8 g/t Ag (dump material)

- La Flor vein

- 1.68 g/t Au, and 10% Zn (vein sample approximately 70 metres below surface)

The assay results obtained by Oro Silver verify the grade of the silver reserves reported by Industrias Penoles S.A. de C.V. in 1988 (non-NI 43-101 compliant). In addition, the sampling on three sub-parallel veins, the Armado, La Flor, and San Jose, suggests additional silver and base metal potential at these under-explored targets. A plan map with the location of the veins at Vetagrande can be viewed on the company's website.

Oro Silver plans to drill a minimum of 5,000 metres in order to define and develop a silver 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 Au was by fire assay, with a gravimetric finish on samples exceeding 3 g/t Au. Analysis of Ag was by atomic absorption, with a gravimetric finish on samples exceeding 200 g/t Ag. Samples exceeding 10,000 ppm for Cu, Pb, or Zn 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.

ON BEHALF OF THE BOARD OF DIRECTORS,

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.

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) 646-1580
    (604) 642-2411 (FAX)
    Website: www.orosilver.com