MetallurgyThe company has performed extensive metallurgical tests and modeling to prove the metallurgical response of the different ore types found at Corani. The testing establishes that 82% of the ore-respond very well to conventional flotation producing two separate, highly commercial concentrates with good metal recoveries. The remaining 18% of the material is a transitional ore that has moderate flotation response. To establish the metallurgical behaviors Bear Creek performed variability tests on the different materials to establish the appropriate treatment methods and the mineralogical makeup of the ores. Bear Creek geologists then used this information to re-log all the core and establish the locations of all the different ore types in the deposit. From this information a 3D model of the ore distribution was constructed and used for mine planning. Locked-cycle tests were then designed and performed to match the expected blend of material to the concentrator according to the mine sequence. The results of this test work is being carried forward into the Feasibility Study.There is a minor component of oxide material at Corani that is suitable for a leach recovery method; the prefeasibility study did not include this material in the operation plan but Bear Creek is looking at a test program to bring this material into the operation plan by using a heap leach or an oxide mill to recover the silver. Bear Creek Mining, Corani Project Silver Zone Average Recoveries and Concentrate Grades of the Life of the Project
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