Following the recent flurry of drilling on its Nama project, Caledonia Mining (CAL-T) has announced a reserve calculation for one of its cobalt-copper deposits in Zambia.
The company reports a preliminary resource of 16.3 million tonnes grading 0.045% cobalt and about 0.16% copper for the Nama Anomaly A deposit, as determined by Watts, Griffis & McOuat.
Situated along the northwestern boundary of the Zambian copper belt, the property hosts several large, low-grade zones of cobalt-copper mineralization. The company plans to recover cobalt and copper from oxidized, near-surface deposits using open-pit, heap-leach technology.
The junior is continuing its drill program at the Anomaly A deposit and 11 km to the northeast, at Anomaly C. Geochemical soil sampling has been completed over 93 sq. km and a program to sample the remaining 585-sq.-km licence area is under way.
Meanwhile, in nearby Zaire, International Panorama Resource (ILP-V) has secured the rights to a joint-venture with La Generale des Carrieres et des Mines (Gecamines), Zaire’s state-owned mining company, to recover cobalt and copper from tailings.
The tailings, situated near the concentrators at Kambove and Kakanda, contain 61 million tonnes with an average grade of 0.19% cobalt and 0.98% copper. The mineralization occurs both as an oxide and sulphide within siliceous and dolomitic host rocks.
An initial review by the company suggests reserves could support a 17,000-tonne-per-day solvent extraction-electrowinning operation with a mine life of 10 years. The company has begun a US$3-million feasibility study, to be completed by the first quarter of 1997.
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