Chile's Collahuasi says mineral resources up 19 pct in 2012
February 06, 2013 at 12:11 PM EST
SANTIAGO, Feb 6 (Reuters) - World No.3 copper mine Collahuasi said on Wednesday its mineral resources grew by 19 percent to 9 billion tonnes last year compared with 2011 levels, due in part to new drilling campaigns and improvements in mining design.
