UPDATE 3-Peru strike spares output at top copper and gold mines
(Rewrites throughout after responses from companies and unions)
LIMA May 18 (Reuters) - Peru's production of copper and gold was largely unaffected by a national strike on Monday as unionized workers declined to down tools for fear of losing their jobs and companies used replacements.
Walk-outs at some mines, however, might have curbed silver, tin and iron output, according to unions in Peru, the world's third biggest copper, silver, zinc and tin producer and the seventh-ranked gold producer.
The strike, organized by the National Mining Federation that represents about 20,000 workers, aimed to press the government to tighten restrictions on firings and the use of contract workers.
But plans for an ambitious stoppage across Peru were upended after the government declared the strike unfounded and companies threatened to dismiss strikers or ordered contract workers to fill in, said federation head Ricardo Juarez.
Copper output from Peru's four top producers, Antamina, Southern Copper, Cerro Verde and Antapaccay, was normal, union bosses at the mines said. The mines together produced about a million tonnes of the red metal last year, or more than three quarters of Peru's total copper output.
Likewise, production at Peru's top gold deposits, Yanacocha and Misquichilca, which together churned out 1.6 million ounces of gold last year, continued unaffected, union leaders said.
But silver output from Uchucchacua was partially hurt by a strike that began earlier in May, said Carlos Galvez, the chief financial officer of operator Buenaventura . Galvez declined to specify by how much. The head of the Uchucchacua union said 50 percent of the mine's total workforce remained active.
Operations were normal at other leading silver producers, including Volcan and Antamina, said union leaders there. Continuación...