Trevali encuentra una mineralización mayor en Halfmile

Resumen: De acuerdo a los resultados iniciales de la mina Hafmile, Trevali Mining Corporation indica que el masivo cuerpo de sulfuro es aproximadamente 25% más ancho de lo estimado previamente. 

        Trevali prevé que la producción de la Zona Superior puede ser moderamente superior a lo previsto. Si bien este es un hecho positivo, no cambia el actual calendario de producción de la compañía, ya que esta zona representa menos del 10% del depósito de Halfmile.

La empresa también informa que ha procesado alrededor de 30 000 toneladas de material mineralizados de Brunswick-12 Mill, propiedad de Xstrata, cuyos resultados se darán a conocer luego de la recepción de los informes finales. 

Trevali Encounters Wider Than Expected Mineralization in Operations at Halfmile Mine in New Brunswick

Reconciliation Indicates 25% More Tonnage on Halfmile Level 1 30,000-Tonnes Processed at Xstrata's Brunswick 12 Mill 

VANCOUVER, BRITISH COLUMBIA, May 01, 2012 (MARKETWIRE via COMTEX) -- Trevali Mining Corporation ("Trevali" or the "Company") CA:TV -2.36% (otcqx:TREVF)(lma:TV)(frankfurt:4TI) is very encouraged by the results of initial mining at its 100%-owned Halfmile Mine in New Brunswick. Reconciliation of planned-versus-actual mined production indicates the massive sulphide body is approximately 25% wider than modelled on the first level (Figure 1: http://media3.marketwire.com/docs/TV0501.pdf ). The Company is also pleased to report it has processed approximately 30,000 tonnes of mineralized material at Xstrata's Brunswick-12 Mill during April - results of which will be released upon receipt of the final reports. 

Recent underground definition drilling indicates increased widths continue in the mineralized body above the current production level with 22 of the 24 drill holes intersected semi-massive to massive sulphide mineralization outside the currently defined mineralized body for the Upper Zone. These production-definition holes have been sampled and the geochemical assay results will be released upon receipt. 

 HALFMILE UPPER ZONE 

Since 2009, the Company has drilled an additional 2,519 metres from surface targeting the Upper Zone of the Halfmile deposit in order to obtain fresh material for metallurgical testing and to gain a better understanding of the sulphide body configuration and grade distribution. 

Considering the successes of the Company's diamond drill campaigns coupled with this new and ongoing mining and underground information, Trevali anticipates that production from the Upper Zone may be moderately higher than anticipated. While this is a positive development, it does not materially change the Company's current production schedule as this zone represents less than 10% of the current Halfmile deposit as presently defined.

Approximately 37,000 tonnes grading 6.39% Zn, 1.9% Pb, 0.65% Cu, 40.57 g/t Ag and 0.4 g/t Au were mined in the initial phase and 30,000 tonnes have been processed at Xstrata's Brunswick-12 processing plant. The Company is presently awaiting final metallurgical results which will be released upon receipt. 

The Company will update the Halfmile - Stratmat National Instrument 43-101 ("NI 43-101") report upon receipt and QA/QC analysis of the final surface and underground drill results.

HALFMILE AND STRATMAT DEPOSITS

The Halfmile and Stratmat deposits are a multi-lens zinc-lead-silver-copper-gold rich volcanogenic massive sulphide (VMS) deposits located in the renowned Bathurst Mining Camp of northern New Brunswick in eastern Canada. They contain significant NI 43-101 Resources - all of which remain open for expansion (Table 1): 

        
        -----------------------------------------------------------------------
        -
                         Halfmile and Stratmat Deposit Resources
        ------------------------------------------------------------------------
                            Tonnes        Zn%        Pb%        Cu%      Ag (g/t)
        ------------------------------------------------------------------------
                                        HALFMILE
        ------------------------------------------------------------------------
        Indicated        6,262,043       8.13       2.58       0.22        30.78(i)
        ------------------------------------------------------------------------
        Inferred         6,078,200       6.69       1.83       0.14        20.51(i)
        ------------------------------------------------------------------------
                                        STRATMAT
        ------------------------------------------------------------------------
        Inferred         5,524,500       6.11       2.59       0.40        54.21
        ------------------------------------------------------------------------
        Calculated by Tetra Tech Wardrop engineers and geologists using a 5%
        ZnEQ cutoff
        (i) Silver and gold not routinely analyzed for in historic drilling.
        ------------------------------------------------------------------------
        Table 1: National Instrument 43-101 Resource Estimates for Halfmile and
        Stratmat Deposits.
        
         

An independent Preliminary Economic Assessment(i) from Tetra Tech Wardop engineering in September 2010 indicated a pre-tax Net Present Value (6%) of C$343 million at metal prices of US$1.03/lb Zinc, US$3.03/lb Copper, US$0.92/lb Lead and US$15.08/oz Silver. The study did not take into account any potential gold credits. 

(i) Mineral resources that are not mineral reserves do not have demonstrated economic viability. 

Fuente: http://www.marketwatch.com