luisha South Project
Luisha South Pit
Located in the northwest corner of the permit, previous mining work during the 1940’s by Union Miniere of Katanga (230,000t @ 10.1%Cu and 2%Co), and more recently by artisanal miners, has been limited to high grade ore shoots now exposed in a 250m long, 80m wide and 30m deep pit.
Recent small scale mining by TSM Enterprises on the footwall of the pit has exposed a Cu and Co rich sequence hosted in carbonaceous breccias in a chalk rich matrix. Grades returned have been as high as 30%Cu and 20%Co from selectively mined zones.
Limited sampling from the base of the pit by independent consultants Strathcona Mineral Services in 2007 returned average grades of 3.2%Cu and 0.60%Co over 10 metres and 5.04%Cu and 0.16%Co across 6.5 metres. Subsequent outcrop channel sampling from the pit resulted in assays ranging from 0.7%Cu to 9.2%Cu and 0.2%Co to 2.8%Co.
African Metals has recently completed a mapping and trench, adit, pit and rock chip outcrop sampling program of the entire licence with 255 samples being collected and submitted to ALS Chemex laboratories in South Africa.
Exploration Potential – The South East Strike Extension
The Luisha permit covers some 3.5 kilometres strike length of the Roan Group Mine Sequence and is considered highly favourable for Cu-Co mineralization. Historical mines are located at either end of this strike trend. With drill information available for the pit area only, information on the geology of the remaining permit is based on historical mapping from 1925, which shows the Roan Group to extend from Luisha southeast to Juidera, Kipoi and Kileba within Tiger Resources licences.
On adjacent properties, recent work by Tiger Resources at Kipoi, has confirmed continuous Roan Group units over a strike length of about 13 kilometres across the Kipoi permit area where Tiger report an inferred resource of some 13.4 million tonnes at 3.3% Cu, 0.15% Co, and 3.3g/t Ag for the Kipoi project.
Results of a definitive feasibility study for the Kipoi project, managed by Lycopodium Engineering Pty Ltd, defined a measured and indicated mineral resources of 2.9 million tonnes with a grade of 8.1% Cu and 0.15% Co, using a 5% Cu cut-off grade. African Metals management believes that there is potential for developing copper-cobalt resources similar to those found on the adjacent properties.
Luisha Project Low Grade Stockpile
A stockpile of approximately 350,000 tonnes adjacent to the pit has been sampled by independent consultants Strathcona Mineral Services in 2007 using an excavator. Grades from ten pits varied from 0.1% to 1.9% Cu and 0.1% and 0.9% Co. This material may prove to be economically viable through a heap leach process. Further sampling and test work is required.