Expansion Drilling Intersects 0.53% Copper Over 351 Meters at the Los Azules Project
Ontario, May 11, 2012 AEST (ABN Newswire) - McEwen Mining Inc. (
NYSE:MUX)(TSE:MUX) announces that expansion drilling at its 100% owned Los Azules Copper Project, in San Juan Province, Argentina has intersected 0.53% copper over 351 meters, including 0.71% copper over 167 meters, in Hole 1279. This hole is located 340 meters southeast of Hole T-01, which last year returned 0.50% copper over 269 meters, including 0.95% copper over 45 meters.
In addition, Hole 1175, located 200 meters east of T-01, returned 0.70% copper over 15 meters before being terminated due to bad ground conditions. Hole 1175 extends the mineralization beyond the known limits of the deposit.
-----------------------------------------Hole From To Thickness Copper (m) (m) (m) Grade (%)-----------------------------------------1175 340 355.2 15.2 0.702 ----------------------------------------- 1279 272 622.7 350.7 0.53 Incl. 456 622.7 166.7 0.71 -----------------------------------------
A total of 2,835 meters were drilled this season in eight holes. A drill hole location map, a table of assay results and a cross section of the Los Azules resource are provided in Exhibits 1, 2 and 3. All of the drill holes from this season were completed on mineral claims that are not subject to ongoing litigation.
Holes 1277 and 1278 were infill, with the remaining holes drilled to expand the resource. Hole 1279 was the only exploration hole that was completed to its target depth. The other resource expansion holes (1174, 1280, 1281A and 1282) were lost prior to reaching the target zone due to difficult ground conditions.
In an effort to solve the problems encountered with the recent drilling at Los Azules, McEwen Mining has signed a contract with Major Drilling to provide four core drills for the 2012-13 drill season which are considerably more powerful than the ones used this season. The company believes this will increase the likelihood of reaching target depths (+500 meters), where high-grade copper mineralization has been encountered. McEwen Mining anticipates starting the upcoming drill season in October, adding 3 months to the program and will commence with the permitting process for a helicopter pad that could allow the drills to operate year round. McEwen Mining will continue to focus exploration efforts on mineral claims that are not subject to ongoing litigation.
An updated resource estimate will be published by mid-year which will incorporate the 7,350 meters of drilling completed in the current and previous seasons.
About Los Azules
Los Azules is a large copper porphyry system located in western San Juan Province within a belt of porphyry copper deposits that straddles the Chilean/Argentine border. This belt contains some of the world's largest copper deposits, including Codelco's El Teniente and Andina mines, Anglo American's Los Bronces mine, Antofagasta PLC's Los Pelambres mine and Xstrata's El Pachón project, among others.
The mineral resources for Los Azules were calculated in June 2010 and are summarized in the table below for the "base case" cut-off grade of 0.35% copper. The base case cutoff grade is based on experience from other projects with similar characteristics, potential scale of operation and location.
------------------------------------------------ Mineral Tonnes Copper Contained Gold SilverResource (millions) (%) Copper g/t g/t Category (MM lbs)------------------------------------------------ Indicated 137 0.73 2.2 0.07 1.7 Inferred 900 0.52 10.3 0.07 1.7 ------------------------------------------------ *Effective Date of June 2010
There is a high-grade secondary enrichment zone near the top of the mineralization. A cut-off grade of 0.70% copper is used to define "high-grade" mineralization, and the material above the 0.70% cut off approximates the secondary enrichment zone, but it is not exactly coincident. The portions of the deposit that exceeded the 0.70% copper limit are 67 million tonnes of indicated resources at an average grade of 0.95% (1.4 billion pounds of contained copper) and 127 million tonnes of inferred resources at an average grade of 0.86% (2.4 billion pounds of contained copper).
A portion of the Los Azules Copper Project is subject to litigation in the Courts of British Columbia. Shareholders and other interested parties are encouraged to review our most recent quarterly filings for detailed information. The trial is set to commence in November 2012 and last for approximately six weeks.
The NYSE and TSX have not reviewed and do not accept responsibility for the adequacy or accuracy of the contents of this news release, which has been preared by management of McEwen Mining Inc.
View the full release including cautionary statements, tables and charts at:
http://media.abnnewswire.net/media/en/docs/72605-MUX20120511.pdf
About McEwen Mining Inc
McEwen Mining (NYSE:MUX) (TSE:MUX) has the goal to qualify for inclusion in the S&P 500 Index by creating a profitable gold and silver producer focused in the Americas. McEwen's principal assets consist of: the San José mine in Santa Cruz, Argentina (49% interest); the Black Fox mine in Timmins, Canada; the Fenix Project in Mexico; the Gold Bar mine in Nevada, currently under construction; and the large Los Azules copper project in Argentina, advancing towards development.
McEwen has approximately 345 million shares outstanding. Rob McEwen, Chairman and Chief Owner, owns roughly 23% of the shares.
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