Vancouver, British Columbia-based Taseko Mines (NYSEMKT:TGB) needs to find itself a new chief financial officer. The one it had has flown the coop.

On Monday, Taseko announced that CFO Peter Mitchell has resigned from the company "to accept a CFO role with a US-Based mining company" that was not identified. So far, no other miner has announced his hiring, either.

Taseko says it will begin searching for a replacement immediately. Investors -- perhaps less than pleased with the 24% decline in their stock's market cap over the past year -- didn't seem too upset to see Mitchell go, either. To the contrary, Taseko shares gained 0.4% in Monday trading to close at $2.38.