Cobalt and Copper mineralisation defined over 700m width down to 280m below surface

  • Transgressed by 2km of prospective Mines (R2) Roan sediments
  • Significant drilling results included 42.85m at 0.39% Co from 256.55m including 6.40m at 1.11% Co from 282.45m & 8.40m at 2.7% Cu from 269.15m
  • Channel sampling of the same zone at surface reported at 9.87m at 0.55% Co
  • Metallurgical testwork will establish suitable simple concentration processes for early shallow production

Mwilu covers 3.36km2 within the Kolwezi “Klippe” (Figure 1) which hosts a number of the largest known Cobalt and Copper mines and borders the city of Kolwezi to the north. Taruga conducted sampling and mapping programmes and drilled 9 diamond holes as shown in Figure 2 at Mwilu during the 6 month Due Diligence period to confirm historical mapping carried out by La Générale des Carrières et des Mines (Gécamines) and grade of mineralisation being mined on a small scale at surface. At shallow levels, no significant Copper grades were reported, confirming a dominance of near surface Cobalt mineralisation at Mwilu. Drilling has confirmed Copper mineralisation at depth.

The Company is satisfied that drilling results could potentially support a significant Cobalt and Copper mineralised sequence of R2 sediments and will now conduct a metallurgical testwork programme to establish suitable simple concentration processes for early shallow production.

Figure 2: Interpreted geology and diamond drilling results at Mwilu.

Figure 1: Geological map of the Kolwezi “Klippe” showing the Mwilu and Kamilombe project areas and known mines and deposits.


Drilling has shown that two styles of mineralisation occur at Mwilu, each with potential to host significant Cobalt mineralisation. The northern flat lying zone is of lower grade, but mineralisation attains thicknesses of more than 30m, with a combined thickness of 90m in one hole and a southern, high grade steeply dipping zone which is likely amendable to an underground operation.

A highly significant result of 6.40m at 1.11% Co from 282.45m within a broader zone of 42.85m at 0.39% Co from 256.55m was reported for hole MWDD008 in the southern zone. Channel sampling within artisanal workings at surface reported 19.32m at 0.33% Co including 9.87m at 0.55% Co from the same zone at surface, confirming significant mineralisation down to a vertical depth of 280m. A significant Copper intersection of 13.05m at 2.02% Cu from 264.5m including 8.40m at 2.7% Cu from 269.15m was reported from the same zone.

To the north Cobalt mineralisation is confined within a shallow dipping synclinal fold structure as shown in section Figures 3 and 4. Best results from the northern zone included 16.30m at 0.16% Co from 31.9m, 46.60m at 0.12% Co from 81.55m and 6.20m at 0.32% Co from 164.85m in MWDD004; 13m at 0.13% Co from 50.45m, 1.52m at 0.41% Co from 67.83m, and 6.45m at 0.24% Co from 79.45m in MWDD006; 33.80m at 0.14% Co from 57.6m in MWDD007. The northern zone attains a maximum depth of roughly 170m and is approximately 700m wide. Both zones potentially transgress the licence area by roughly 2km.

Figure 3: Cross section across both the northern and southern zone showing mineralisation confined to the synclinal structure in the northern zone and the steeply dipping southern zone on geology.

Figure 4: Cross section across the northern zone showing mineralisation confined to the synclinal structure on geology.

The Company considers that simple treatment, such as HMS (Heavy Media Separation) and or gravity separation, will concentrate the shallow Cobalt mineralised material within the northern area of Mwilu. Drill samples indicate the ore is friable and may not need crushing or particle size reduction, simplifying the concentration plant requirements. Artisanal miners presently use simple hand operational methods, without chemicals, to produce a saleable concentrate, which suggests a commercial operation could be deployed to achieve more consistent results from controlled processing equipment.

Taruga plans to start early, shallow surface mining on completion of the metallurgical studies through simple concentration processes once confirmed.

Infill drilling programmes for resource definition and metallurgical drilling will commence on the successful completion of the ongoing due diligence at Mwilu.

1NOTE: All samples were prepped at ALS Global’s sample prep facility in Lubumbashi from where pulps were submitted to ALS Global’s accredited laboratory in Johannesburg for 4 acid digest and ICP-AES finish. Reported results used a cut-off grade of 0.5% Cu and 0.1% Co with a maximum dilution of 3.3m within each intercept.