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Trevali Defines Significant Zinc Mineralization At Santander Tailings

April 24, 2008

Highlights include 32 metres @ 3.27% Zn and 22 metres @ 3.65% Zn

Vancouver, British Columbia... Trevali Resources Corp. ("Trevali" or the "Company") (CNQ: ZINC, Frankfurt: 4T1, Pink Sheets: TREVF) is pleased to announce initial borehole results from the tailings resource definition drill program at the former Santander Mine indicating the presence of a large potential bulk-tonnage, low-cost, readily exploitable zinc resource.

Additional highlights include:

  • 24.5 metres @ 3.06 % Zn
  • 25.4 metres @ 2.44% Zn
  • 19.4 metres @ 2.67% Zn

The Company has completed 55 boreholes of the planned resource definition program and received assay results for the first 21 holes submitted (Table 1 & Figure 1). Significant from a metallurgical viewpoint - initial test-work indicates mineralization should be readily amenable to low cost processing technologies ultimately producing a c. 49% or greater zinc concentrate (see TRC-NR-08-03) (Table 1).

Percussion boreholes were drilled on 50 metre centers with results clearly demonstrating zinc mineralization commences on surface and displays good to excellent intra and inter-hole continuity; forming a thick wedge in the north-western portion of the tailings impoundment and thinning gradually towards the south-eastern area (Figure 1).

Zinc grade follows a similar pattern with a relatively high grade core (considering the sample type which has previously passed through the Concentrate Plant) of +2 to 3% Zn gradually diminishing to approximately 1 to +1% Zn to the south east (Figure 1).

Noteworthy results form a core component of the Company's plans to fast-track production and compliments the thus far highly successful hard-rock exploration and resource definition programs currently under-way in the central and northern portions of the property (see TRC-NR 08-01 & 02 for details). Additional hard-rock results are imminently anticipated upon receipt and QA/QC of several over-limit assay results.

Table 1: Summary of Initial Tailings borehole results

Borehole* Number Interval**
Zn % Coarseness %

Note: * Boreholes drilled on pre-determined plan consequently numbers out of sequence.
** Interval equals total borehole depth from surface to end of hole.
*** Sieve tests (coarseness) preformed in Company's on-site metallurgical laboratory.

The Santander tailings impoundment covers an area of 500 by 500 metres and is located 150 to 900 metres, at its furthest point, from the Concentrate Plant.

Tailings Background

Examination of historic records indicates Santander was initially operated as a lead-silver mine with significant quantities of zinc reporting to the tailings. In later years, the transition from open-pit to underground extraction and depressed metal prices resulted in a relatively high zinc cut-off grade of 6% coupled with relatively poor metal recoveries. The outcome of which was additional zinc reported to the tailings pond. Immediately prior to mine-closure, a 19-day pilot scale test demonstrated the feasibility of upgrading this material and producing a saleable zinc concentrate.

Project Background

The former Santander Mine produced approximately 8 million tonnes of ore at 6- 10% zinc, between 1% and 4% lead and 60 g/t silver, plus additional copper credits from a single high grade pipe or chimney. Mining ceased in c. 11% Zn with historic exploration indicating mineralization extends for at least an additional 200 metres depth.

Site infrastructure includes a large camp and associated support facilities, an ore processing / concentrator plant (including various crushers, mills and cell houses) able to produce zinc, leadsilver and copper concentrates, and the Company's operating Tingo hydro-electric power-station, located some 17 kilometres down-valley to the West.

Future Work

The Company is committed to adding shareholder value by fast-tracking this highly prospective, eminently accessible and exciting project to production in the shortest time-frame feasible. Presently there are five drill rigs conducting resource definition drilling on the property.

Corporate Communications

The Company is pleased to announce the following new additions to the Trevali team:

Carlos Ballon - Chairman

A graduate from Colorado School of Mines, Carlos is a highly experienced mining engineer who managed the Santander Mine from 1985 to 1993. More recently he was VP South America for Corriente Resources followed by Director of Thiess South America (Australia's largest contract miner) where he managed major engineering works at Tintaya and Yanacocha respectively.

Steve Stakiw -- Manager Corporate Communications

Mr. Stakiw is a geologist with 20 years of mineral industry, research and finance market experience, most recently serving as Western Editor of The Northern Miner publication. In his role with Trevali he will initiate and oversee development of a comprehensive investor communications program and increase the company's exposure in the financial community.


The Company further announces that, pursuant to its 2007 Incentive Stock Option Plan, it has granted incentive stock options to certain directors, officers and consultants allowing them to purchase up to an aggregate of 300,000 common shares in the capital stock of the Company. The options are exercisable at a price of CAD 2.00 for a period of two years ending April 23, 2010.

Qualified Person and Quality Control/Quality Assurance

EurGeol Dr. Mark D. Cruise, Trevali's President & CEO and a qualified person as defined by National Instrument 43-101, has supervised the preparation of the scientific and technical information that forms the basis for this news release. Dr. Cruise is not independent of the Company, as he is an officer and shareholder.

The work programs at the Company's property were designed by, and are supervised by, Mark D. Cruise, President, Trevali, and Les Oldham, General Manager, Consultora Minera Anglo Peruana S.A.(independent geological consultants), who together are responsible for all aspects of the work, including the quality control/quality assurance program. On-site personnel at the project rigorously collect and track samples which are then security sealed and shipped to ALS
Chemex Laboratories, Lima, for assay. Analytical accuracy and precision are monitored by the analysis of reagent blanks, reference material and replicate samples. Quality control is further assured by the use of international and in-house standards. Blind certified reference material is inserted at regular intervals into the sample sequence by Trevali personnel in order to independently assess analytical accuracy. Finally, representative blind duplicate samples are routinely forwarded to ISO compliant third party laboratories for additional quality control.

About Trevali Resource Corp.

The Company is currently exploring and conducting various scoping level studies on the former Santander poly-metallic mine Peru in order to ascertain as best as possible the cost and feasibility of re-commencing mining operations in a timely manner should exploration prove to be successful.

The common shares of the Company are currently listed on the CNQ (symbol ZINC). For further details on the Company readers are referred to the Company's web site (, Canadian regulatory filings on SEDAR at

On Behalf of the Board of Directors of

"Mark D. Cruise" (signed)
Mark D Cruise, President

Contact Information:
Steve Stakiw, Manager -- Corporate Communications
Phone: (604) 408-7488 / Fax: (604) 408-7499

The CNQ has not reviewed and does not accept responsibility for the adequacy or accuracy of this release.

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