Posts by Marketwire - Mining and Metals:

Rockex Airborne Survey Identifies Iron Formations at Its Lake St. Joseph Properties

Rockex Mining Corporation ("Rockex" or the "Company") (TSX:RXM) is pleased to announce the results of an airborne high-resolution aeromagnetic survey flown over its Western Lake St. Joseph, Doran Lake and Root Lake Projects in the Lake St. Joseph area, located in northwestern Ontario 80 kms southwest of Pickle Lake and 100 kms northeast of Sioux Lookout.

Lucara Diamond says AK6 in Botswana now 84% built, Lesotho project nearing pre-feasibility

Lucara Diamond Corp. ("Lucara" or the "Company") (TSX:LUC)(BOTSWANA:LUC) is pleased to provide the following update on the development of its AK6 diamond mine in Botwsana which is rapidly nearing completion as well as the trial mining program at the Mothae diamond mine in Lesotho which, based on continued good results, will soon be moving into the pre-feasibility stage.

Atacama Pacific Reports Continued Positive Metallurgical Results from Cerro Maricunga Gold Project

Atacama Pacific Gold Corporation (TSX VENTURE:ATM) ("Atacama Pacific") is very pleased to report further positive results from metallurgical testing from the it's oxide-associated Cerro Maricunga Gold Project located in northern Chile, 20 kilometres south of Kinross Gold's La Coipa precious metals mine. The testing was undertaken by Laboratorio Plenge ("Plenge"), Lima, Peru and by Advanced Mineral Technology Laboratory Ltd. ("AMTEL"), London, Canada.

Canasil Discovers More Silver Mineralization at Sandra-Escobar Project in Durango State, Mexico

Canasil Resources Inc. (Canasil) (TSX VENTURE:CLZ)(FRANKFURT:3CC) announces that assay results from drill hole SE-11-11, drilled to a depth of 175.6 metres to test the San Francisco vein area at the Sandra-Escobar silver-gold project in Durango State, Mexico, confirm disseminated silver mineralization with 19.09 g/t silver, 0.12% lead and 0.22% zinc over 52.5 metres, starting at 7.50 metres below surface to a depth of 60 metres.

Osisko’s Quebec mining first

Osisko Mining Corporation ("Osisko" or the "Company") (TSX:OSK)(FRANKFURT:EWX) is proud to announce it has deposited the amount of $22.1 million with the Quebec Government, representing 50 % of the financial guarantee of $44.2 million, to cover the entire future cost of rehabilitating its new Canadian Malartic mine site in the Abitibi region of Quebec. The balance of the guarantee will be remitted as two subsequent payments of $11.05 million each, to be made on or around September 1, 2012 and September 1, 2013.