Walkabout holds 100% of the prospecting rights over 2,000km2 in what is potentially one of the Namibia’s most prospective regions for lithium bearing pegmatites.
The project comprises two exploration prospecting licences EPL’s 6308 and 6309 located in the extreme south of Namibia approximately 25km north of the Orange River and the border of South Africa. It is also approximately 7km from the AIM listed Kennedy Ventures plc Namibia Tantalite Investment (NTI) Mine (former Tantalite Valley), where Lithium-Caesium-Tantalum (LCT) type pegmatites containing both lepidolite and spodumene lithium mineralisation with grades > 1.6% Li2O have been reported from rock samples.
Infrastructure (roads, rail, power and water) around the project area is well developed with the town of Karasburg approximately 40km to the northeast.
Southern Namibia is a relatively under-explored region with known lithium occurrences that has been the focus of a recently published mapping programme completed as a joint initiative between the Council for Geoscience (South Africa) and the Geological Survey of Namibia.
In Namibia, lithium is hosted in Neoproterozoic Rare Metal Pegmatites of the Orange River Pegmatite Belt (ORPB). These pegmatites have been noted from the Tantalite Valley pegmatite swarm approximately 10km to the south of the Eureka project area, and are associated with both the Pofadder Shear zone, and to the south within the Sandfontein-Ramansdrift pegmatite swarm.
The recent mapping delineated extensive and large pegmatites within the Walkabout licence area with more than 60 pegmatites for a combined strike length of approximately 90 line-kilometres of outcrop mapped in various pegmatite clusters, with the largest outcrop being over 2km in strike length. The highest concentration of pegmatites on the licences occur within, and proximal to, the Eureka shear zone, which transects the southern central area of EPL 6308 that was identified during the course of the recent mapping project. There is a high probability that the extent of the pegmatite bodies could be further increased as most of the area is covered by a thin veneer of recent sediments. Additional pegmatite bodies (outside of the recent mapping area on EPL6308) were also encountered by the WKT team and these are likely to extend northward into EPL6309 (which was not mapped as part of the government project).
Mineralisation generally consisting of tantalite, columbite, beryl, lithium and REE is variably developed in several of these pegmatites including those that flank the southern portions of EPL 6308. Lithium mineralisation has been sporadically mined for the past 45 years to the south of the Eureka Project area (Namibia Tantalite Investment Mine). Petalite is not known to occur with any of the Li bearing pegmatites and they are classified as spodumene-Li-mica, amblygonite type.
Structural features are the main controlling factor in the distribution of the pegmatite bodies with shearing dominating these controls as noted within the Eureka shear zone developed in EPL 6308. This suggests that there is also good potential for pegmatite development within the southern portions of EPL 6309 and that a NW trending pegmatite swarm noted in the NE of EPL 6308 is likely to continue northwards into the unmapped and undercover areas of EPL 6309. The probability of an additional shear zone running through EPL6309 is also under investigation by the WKT geological team.
Prospective structural zones and Li occurrence localities on Landsat.