SCOTTSDALE, AZ -- (Marketwire) -- 04/06/11 -- International Minerals Corporation (TSX: IMZ) (SWISS: IMZ) reports updated mineral reserve and resource estimates for the Pallancata silver mine, jointly owned by IMZ (40% interest) and Hochschild Mining plc ('Hochschild', 60% interest) based on information supplied by Hochschild, the mine operator, as at December 31, 2010.