TORONTO (SHfn) – Aurcana (TSX: V.AUN, Stock Forum) shares climbed 12% to $1.05 on volume of more than 5.6 million shares Tuesday after the silver miner announced an updated resource estimate for its La Negra Mine in Mexico, which “shows a 50-fold increase from the prior Measured and Indicated resource estimate of 2.3 million ounces of silver to the current estimate of over 115 million ounces of silver