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At the Pamwa base metal prospect, located 10km south of Akelikongo, drilling has previously intersected primary sphalerite and galena in lithostratigraphic horizons within a large >2km elongate Zn, Pb Ag, Cd, Mn soil anomaly.
A total of 22 aircore holes for 534m and 3 RC holes for 202m were drilled during April 2016. (Figure 1 and inset Figure 2).
The program consisted of shallow RAB and RC drilling of many highly anomalous soil peaks >500ppm Zn + Pb. The assay results indicate broad zones >25m of strongly anomalous zinc plus lead (>1000ppm), silver and cadmium, with thinner higher grade zones 1-7m wide of up to 3.9% combined Pb plus Zn and up to 20 g/t Ag.
The mineralised zones generally occur around a stratigraphic contact in biotite hornblende gneiss beneath a garnet gneiss see Figure 3. As described previously, the soil anomaly is thought to represent a folded or thrust repeated horizon and the drilling confirms this view. It is thought that the eastern limb dips shallowly to the east whilst the western limb is overturned and dips more steeply to the east. The wider and better grade zinc, lead and silver intersections are located on the eastern limb.
Figure 1: Pb plus Zn in soils with strong anomalies labelled with number and outlined in red with drill hole locations.
Figure 2: Plan inset of PAM003, showing section line A-A’
Figure 3: Section A-A’ PAM003
Figure 4: Plot of all drill hole assays Pb vs Zn. Points coloured by prospect number.