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Overview
Introduction
The Batouri licence is located in south east Cameroon and covers a transition between tropical rainforest to the south and open tree savannah to the north. Access from the capital Yaoundé is excellent with a combination of tarmac and maintained laterite roads.
Exploration Summary
Exploration commenced in 2006 with a soil sampling programme in the centre of the licence over the Kambele prospect. Assay results define a 3.5km long zone containing >100 ppb Au, varying between 100 - 1,000m in width, with extensive co-incident hard rock artisanal gold workings (approximately 200 pits), Figure 1. A soil sampling programme 7km to the southwest of Kambele, on the Mongonam - Dimako trend confirmed a 3.5 km long shear zone co-incident with hard rock artisanal workings. Pit sampling of eight artisanal workings, which in places extend to depths of 27m, has returned maximum grades of 65g/t Au over 5 vertical, and 24g/t Au over 4 metres. Further sampling of 122 pits in the Kambele - Dem trend and 50 pits in the Mongonam - Dimako trend has established that gold is predominantly present within quartz veins, with lower grades in altered wall rock. Figure 2 shows the location of the prospects on the Batouri licence.
Figure 1 - Pit sampling in artisanal workings
In 2007, African Aura commissioned a combined IP resistivity and radiometric survey across the Kambele and Mongonam prospects, completing a total of 32 line kilometres using a 200m line spacing. Within the Kambele prospect, the geophysics recorded a low resistivity axis striking 070º interpreted as a fault corridor, running sub parallel to the geochemical anomaly.
Figure 2 - Kambele, Dimako and Djengou prospects, Batouri Licence
Current Status
In April 2008, African Aura initiated drilling at the Kambele Prospect. Drilling to date indicates the presence of two or more, sub-horizontal, sub-parallel gold mineralised zones up to 10m thick containing quartz veins and stringers, dipping 15 degrees towards north. The potential aerial extent of this target is at least 500m by 700m and remains open down dip to the north. Company geologists have recorded visible gold in 25 out of 44 holes drilled at Kambele where the gold is associated with a specific generation of quartz veins and stringers that can be reliably targeted in future drilling programmes (see Table 1; Figure 3,4,5 & 6)
Figure 3: Kambele Drilling Update
Figure 6: Section A-A':
Results to date from Kambele indicate good correlation between the surface geochemical anomaly, potassic alteration as defined by a geophysical survey, and the presence of high grade gold bearing quartz veins.
As of September 2008 one drill rig was mobilised to the north-south striking, 3.5km long Mongonam - Dimako prospect which lies approximately 7km southwest of Kambele. The prospect is defined by a 600m long, greater than 50ppb gold in soil contour that concides with discontinuous hard rock artisanal workings. The artisanal workings at Dimako are up to 20m wide by 20m deep and exploit a granite hosted composite quartz vein. The strike of the Mongonam - Dimako trend is interpreted from the surface soil geochemistry and a ground geophysical survey performed by the Company.
Geological setting The Batouri licence is situated on the southern boundary of a Paleoproterozoic tectonic window within the Neoproterozoic Yaoundé series. The tectonic window comprises a syn-tectonic granite which pre-dates the metasediments of the Yaoundé nappe. The auriferous zones within the granite are considered to be controlled by a major shear zone. The shear zone cuts through the granite resulting in the development of a gentle to steep foliation. The gold bearing quartz veins are not concordant with the foliation, and often found within altered wall rock. Infrastructure & Local Resources
Batouri town is a divisional capital with shops, hotels, and a hospital located 420km east of the capital Yaoundé. It takes approximately eight hours to drive to the project on tarmac and maintained laterite roads. Access within the licence is by 4x4 tracks and forestry roads. The project has good mobile phone coverage, a dedicated satellite link for data and email, and 3-phase electrical power is available from the national grid less than 10km from the main Kambele-Dem trend.
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