The Mansala Project encompasses an area of 48km2 to the south of Alahiné.
Visual examination of satellite imagery is incomplete at this time but has enabled several hundred individual artisanal pits and shafts to be identified within clusters of workings spatially associated with areas of ferruginous colluvium and/or eluvium and soil cover. Cleared areas, where no pits or workings could be discerned have also been extensively prospected by artisanal miners. The presence of widespread artisanal mining activity within the Mansala Licence suggested the area is prospective for gold.
Systematic exploration of the Mansala Licence commenced in December 2020 in which an extensive program of reconnaissance soil geochemistry was completed.
The results of the current survey have confirmed that in summary, 5.0 km2 or 10.4% of the area surveyed reported Au values in excess of 40ppb Au. Of particular interest are gold abundances which are illustrated in the figure below. A total of eleven (11) samples returned Au assays in excess of 1,000ppb (1g/t) Au, and include values of 93.98g/t, 6.03g/t, 5.85g/t, 2.91g/t, 2.38g/t and 1.10g/t which are plotted in figure below.
The distribution of these high values appears to mirror topography, which itself is controlled by outcropping lateritic and ferricrete knobs and ridges. The possibility exists that these topographic highs are the product of topographic inversion, where lateritic fill in ancient river valleys becomes cemented with iron oxides and are strongly resistant to erosion. Thus, with ongoing erosion, ancient river valleys might now be expressed as hills and ridges of this resistant material. Potentially, such inferred ancient river valleys may host either hard rock or deep lead gold mineralisation. Artisanal miners have exploited gold shedding from present day topographic highs but have not addressed potential deeper mineralisation within or beneath the hills and ridges.
Also, of interest in the NE Quadrant of the Mansala Licence is an area of elevated topography. This area is geochemically prominent, with anomalous concentrations of Au, Ag, As, Mo, Sb, Fe, Cr, Ti and P present in soils. The significance of these responses is not known but may be indicative of mineralisation at depth. Numerous artisanal workings in this area lend credence to this possibility. Follow up work comprising detailed geological mapping and sampling will be required to identify the source of the anomalism and to site drill holes.
In summary, the Mansala soil sampling program has successfully identified potential targets and areas of interest. These will be followed up and drill tested in the coming field season. Further interpretation of the large body of geochemical data acquired will likely produce additional drilling targets.