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Trevali Confirms High-Grade Mineralization at Puajanca Prospect on Santander Silver-Lead-Zinc Mine Project in Peru

September 23, 2008

Surface sampling returns values up to 17.9 ozs./tonne (558 g/t) Silver, 26% Lead and 18.93% Zinc

News Release TRC-NR-08-12

Vancouver, British Columbia... Trevali Resources Corp. ("Trevali" or the "Company") (CNQ: TV, Frankfurt: 4TI, Pink Sheets: TREVF) is pleased to announce that initial field work and surficial sampling confirms the presence of significant silver-lead-zinc mineralization at its Puajanca prospect on the advanced-stage Santander mine project located in the Cerro de Pasco region of west-central Peru (Figure 1).

The average of all samples collected to date (n=10) is 8.4 ozs./tonne (262.6 g/t) silver, 13.4% lead and 7.7% zinc (Table 1).

Table 1: Summary assay results Puajanca Prospect, Santander Mine
Sample-Type* Ag equivalent** Ag oz/t (g/t) Pb % Zn %
Outcrop58.4 oz (1816 g/t)12.4 oz (387 g/t)26.06%8.68%
Outcrop13.8 oz (429 g/t)2.8 oz (88 g/t)7.36%0.93%
Outcrop23.7 oz (736 g/t)5.9 oz (183 g/t)9.61%3.83%
Talus Float46.8 oz (1456 g/t)6.4 oz (199 g/t)20.64%9.91%
Talus Float64.4 oz (2004 g/t)17.9 oz (558 g/t)20.79%14.36%
Talus Float43.5 oz (1353 g/t)9.9 oz (309 g/t)13.94%11.43%
Talus Float19.3 oz (599.8 g/t)6 oz (188 g/t)9.81%0.2%
Talus Float51.6 oz (1606 g/t)10.5 oz (326 g/t)11.65%18.93%
Talus Float31.6 oz (981.9 g/t)7.8 oz (243 g/t)9.05%8.91%
Talus Float11.9 oz (370.8 g/t)4.7 oz (145 g/t)5.43%0.06%
*Characteritzation or grab samples only
**Silver equivalent calculated using following metal prices: Ag $15/oz, Pb $0.9/lb, Zn $0.9/lb, Cu $3/lb and assumes 100% recoveries.

Mineralization is exposed over an area of 120 metres long by 20 metres wide and 25 metres thick - a significantly greater area than exposed at any of the Magistral Zones where diamond drilling has intersected very significant silver-lead-zinc mineralization (see website for details).

The Puajanca prospect is located approximately one kilometre east-northeast of the Magistral Norte Zone. Mineralization is hosted within the Santander anticline - host to the Santander orebody approximately 3 kilometres along strike and at 700 metres lower elevation to the south-southeast - suggesting that the entire anticline is prospective for similar silver-rich mineralization (Figure 1).

Click to Enlarge

Mineralization occurs within the Pariatambo formation with the preferred Chulec limestone host formation (host to all three of the Magistral bodies and the lower portions of the former Santander Mine) occurring at depth.

Consequently the mineralization exposed at Puajanca is interpreted to represent high-level leakage from a potentially significant mineral zone at depth.

The high silver/lead-to-zinc ratios also indicate a distal to source setting or the uppermost portions of a pipe or replacement body. Future drilling will test this hypothesis.

Project Background

The Santander silver-lead-zinc mine project is located approximately 215 km by road from Lima, in the western extent of Peru's prolific Cerro de Pasco mineral district. The mine operated from 1958-1993 targeting a single Carbonate Replacement Deposit-type pipe and manto structure, the Santander Orebody. Approximately 8 million tonnes grading +7% zinc, 1-4% lead and 60 grams/tonne silver plus by-product copper was processed - initially from open pit operations and then from underground mining reaching a depth of 500 metres below surface. The current drill program at Santander represents the first modern exploration on the large, 4,455-hectare (44km2) property and is designed to test the three Magistral zones to approximately 200-metres vertical depth on a resource definition basis.

Site infrastructure at the formerly-producing operation includes a fully refurbished 200-man camp and associated support facilities, an ore processing / concentrator plant (including various crushers, mills and cell houses) able to produce zinc, lead-silver and copper concentrates that is currently undergoing a refurbishment program, and the Tingo hydroelectric power-station, located some 17-km down-valley to the west.

Qualified Person and Quality Control/Quality Assurance

EurGeol Dr. Mark D. Cruise, Trevali's President and 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 Santander were designed by, and are supervised by, Mark D. Cruise, President & CEO, 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 ACME Laboratories, Vancouver, for assay. ACME's quality system complies with the requirements for the International Standards ISO 9001:2000 and ISO 17025: 1999. 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 ACME and an ISO compliant third party laboratory for additional quality control.

About Trevali Resources Corp.

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

The common shares of the Company are currently listed on the CNQ (symbol TV). For further details on the Company readers are referred to the Company's web site ( and to 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) 488-1661 / 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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