TORONTO, ONTARIO — (Marketwire) — 08/22/11 — Medusa Mining Limited ("Medusa" or the "Company") (ASX: MML)(LSE: MML), through its Philippines operating company Philsaga Mining Corporation, announces the annual update of the JORC compliant Ore Reserve estimation for the Co-O Mine.The Probable Reserve as at 30 June 2011, now stands at 502,000 ounces contained in 1,500,000 tonnes at 10.1 g/t gold.Conversion of resources during the year has maintained the Probable Reserve con
