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Trevali Commences Resource Conversion and Expansion Drill Program at its Stratmat Deposit in New Brunswick, Canada

October 28, 2011

Vancouver, British Columbia...Trevali Mining Corporation ("Trevali" or the "Company") (TSX: TV; BVL: TV; OTCQX: TREVF; Frankfurt: 4TI) is pleased to announce that it has commenced a diamond drill program at its Stratmat polymetallic massive sulphide deposit in New Brunswick, Canada The program will consist of approximately 5,000 metres of core drilling and is intended to convert a significant portion of the estimated independent National Instrument 43-101 compliant 5.5 million tonne* inferred resource grading 6.11% Zinc, 2.59% Lead, 0.40% Copper, 54.21 g/t Silver, and 0.62 g/t Gold to a higher confidence category.

Initial resource conversion drilling will focus on thicker, high-grade intervals within the principal zones identified to date -- examples are listed in Table 1 and illustrated in Figure 1.

Table 1: Mineral Intercepts used in the resource estimate*
DD Hole


Length (m)
% Zn% Pb% CuAg g/tAu g/t
S1 ZonesST-331A25.10m5.301.920.1936.340.75
Main ZoneST-21818.05m6.832.220.1578.341.03
Central ZoneST-309A13.05m12.334.490.3087.811.65

* NI 43-101 compliant resource estimate by Wardrop Engineering Inc., November, 2008

Figure 1: Stratmat deposit longitudinal projection with resource block drill intercepts

Additional drilling will seek to expand the size of the Stratmat resource where mineralization remains open -- many of the massive sulphide zones are open along strike, up and down plunge and have good-to-excellent potential for resource expansion (Figure 2).

The drill program will also provide representative samples from the various mineralized zones for additional metallurgical testing and in particular, precious metal (gold and silver) tracking.

The Stratmat deposit is a multi-lens volcanic sediment-hosted massive sulphide deposit consisting of pyrite, pyrrhotite, sphalerite, galena, and chalcopyrite mineralization. The deposit is situated approximately 20 km east of the Company's Halfmile Mine development project, where production is anticipated to commence in late 2011, and approximately 25 km south-west of Xstrata's Brunswick 12 mine complex (Figure 3).

Figure 2: Stratmat deposit longitudinal projection with drill intercepts outside of resource blocks
Figure 3: Stratmat deposit and Halfmile Mine location map, northeastern New Brunswick


Trevali is advancing two polymetallic (zinc-lead-silver-copper+/-gold) deposits to production in Canada and Peru -- the Halfmile and Santander projects respectively. In Canada, Trevali has the Halfmile and Stratmat polymetallic deposits near Bathurst, New Brunswick, and the Ruttan copper-zinc deposit in northern Manitoba. Mine development is underway at Halfmile with a proposed production rate of 2,000-tonnes-per-day anticipated to commence in late 2011. In Peru, the Company has the Santander zinc-lead-silver mine project and the formerly-producing Huampar silver mine, both located in the Central Peruvian Polymetallic Belt.

At the planned 2,000-tonne-per-day Santander operation, in conjunction with Glencore International A.G., mine commissioning is anticipated to commence at in early 2012 with full production to follow immediately thereafter. Additionally through its subsidiary Trevali Renewable Energy Inc., Trevali is undertaking a significant upgrade of its wholly-owned Tingo run-of-river hydroelectric generating facility along with transmission line upgrades and extensions to allow, in addition to supplying power to the mining operation on the property, the potential sale of surplus power into the Peruvian National Energy Grid.

The common shares of Trevali are listed on the TSX (symbol TV), the OTCQX (symbol TREVF) and on the Lima Stock Exchange (symbol TV). For further details on Trevali, readers are referred to the Company's web site ( and to Canadian regulatory filings on SEDAR at

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 program at Stratmat was designed and supervised by, Dayle Rusk, P.Geo - VP-Exploration, Trevali, who is responsible for all aspects of the work, including the quality control/quality assurance programs.

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

This news release contains "forward-looking statements" within the meaning of the United States private securities litigation reform act of 1995 and "forward-looking information" within the meaning of applicable Canadian securities legislation. Statements containing forward-looking information express, as at the date of this news release, the Company's plans, estimates, forecasts, projections, expectations, or beliefs as to future events or results and the company does not intend, and does not assume any obligation to, update such statements containing the forward-looking information. Such forward-looking statements and information include, but are not limited to statements as to: the accuracy of estimated mineral reserves and resources, anticipated results of future exploration, and forecast future metal prices, anticipated results of future electrical sales and expectations that environmental, permitting, legal, title, taxation, socio-economic, political, marketing or other issues will not materially affect estimates of mineral reserves. These statements reflect the Company's current views with respect to future events and are necessarily based upon a number of assumptions and estimates that, while considered reasonable by the Company, are inherently subject to significant business, economic, competitive, political and social uncertainties and contingencies.

These statements reflect the Company's current views with respect to future events and are necessarily based upon a number of assumptions and estimates that, while considered reasonable by the company, are inherently subject to significant business, economic, competitive, political and social uncertainties and contingencies. Many factors, both known and unknown, could cause actual results, performance or achievements to be materially different from the results, performance or achievements that are or may be expressed or implied by such forward-looking statements contained in this news release and the company has made assumptions and estimates based on or related to many of these factors. Such factors include, without limitation: fluctuations in spot and forward markets for silver, zinc, base metals and certain other commodities (such as natural gas, fuel oil and electricity); fluctuations in currency markets (such as the Peruvian sol versus the U.S. dollar); risks related to the technological and operational nature of the Company's business; changes in national and local government, legislation, taxation, controls or regulations and political or economic developments in Canada, the United States, Peru or other countries where the Company may carry on business in the future; risks and hazards associated with the business of mineral exploration, development and mining (including environmental hazards, industrial accidents, unusual or unexpected geological or structural formations, pressures, cave-ins and flooding); risks relating to the credit worthiness or financial condition of suppliers, refiners and other parties with whom the Company does business; inadequate insurance, or inability to obtain insurance, to cover these risks and hazards; employee relations; relationships with and claims by local communities and indigenous populations; availability and increasing costs associated with mining inputs and labour; the speculative nature of mineral exploration and development, including the risks of obtaining necessary licenses and permits and the presence of laws and regulations that may impose restrictions on mining,; diminishing quantities or grades of mineral reserves as properties are mined; global financial conditions; business opportunities that may be presented to, or pursued by, the Company; the Company's ability to complete and successfully integrate acquisitions and to mitigate other business combination risks; challenges to, or difficulty in maintaining, the Company's title to properties and continued ownership thereof; the actual results of current exploration activities, conclusions of economic evaluations, and changes in project parameters to deal with unanticipated economic or other factors; increased competition in the mining industry for properties, equipment, qualified personnel, and their costs. Investors are cautioned against attributing undue certainty or reliance on forward-looking statements. Although the Company has attempted to identify important factors that could cause actual results to differ materially, there may be other factors that cause results not to be as anticipated, estimated, described or intended. The Company does not intend, and does not assume any obligation, to update these forward-looking statements or information to reflect changes in assumptions or changes in circumstances or any other events affecting such statements or information, other than as required by applicable law.

Trevali's production plans at Halfmile-Stratmat and Santander are based only on Indicated and Inferred Mineral Resources and not Mineral Reserves and do not have demonstrated economic viability. Inferred Mineral Resources are considered too speculative geologically to have the economic considerations applied to them that would enable them to be categorized as Mineral Reserves, and there is therefore no certainty that the conclusions of the production plans and Preliminary Economic Assessment (PEA) will be realized. Additionally where Trevali discusses exploration/expansion potential, any potential quantity and grade is conceptual in nature and there has been insufficient exploration to define a mineral resource and it is uncertain if further exploration will result in the target being delineated as a mineral resource.

The TSX has not approved or disapproved of the contents of this news release.

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