UPDATE 1-Yamana Gold misses 2013 output target

(Adds detail on specific operations.)

TORONTO, Feb 10 (Reuters) - Yamana Gold Inc YRI.TO reported 2013 production that missed its forecasts on Monday, blaming the shortfall on problems at new mines that it said were resolved by the end of 2013.

The Toronto-based miner, which has operations in Mexico, Brazil, Chile and Argentina, had warned in October that it could miss its 2013 production target but did not give a revised forecast.

Yamana said on Monday it had produced about 1.2 million gold equivalent ounces in 2013. In July the company forecast production between 1.32 and 1.37 million gold equivalent ounces.

"All mines are now producing which should significantly improve the reliability of production and cost estimates going forward beginning in 2014," Yamana said in the release.

At the Pilar mine in Brazil, which began commissioning in July 2013, delayed equipment has now arrived, Yamana said, and production improved significantly in the fourth quarter.

Production also improved at Ernesto/Pau-a-Pique, another mine in Brazil that is ramping up to commercial production, and in Argentina, Gualcamayo's underground expansion began contributing to output in early December, later than expected.

For 2014, Yamana expects to produce 1.4 million gold equivalent ounces, at the low end of its previous forecast of between 1.4 million and 1.5 million gold equivalent ounces.

Yamana defines gold equivalent ounces as gold plus the gold equivalent of silver using a ratio of 50:1.

(Reporting by Allison Martell; Editing by Alden Bentley)

((allison.martell@thomsonreuters.com)(+1 416 941 8196)(Reuters Messaging: allison.martell.thomsonreuters.com@reuters.net))

Keywords: YAMANA PRODUCTION/