ELLUVIAL COLTAN

Using the 5 ppm tin soil geochem contour as a footprint guide the target area is ~6 km2.

Initial test work proposed  comprises the testing of the 3 main +10 ppm Sn areas with 7 trenches.

The volume of material excavated from the 7 trenches is estimated @ 12000 m3 based on total length of the    7 trenches being 3200 m, average depth of trench being 2.5 m and trench width being 1.5 m.

The 7 trenches will provide sufficient information to determine an inferred resource over the 3 target areas of ~550 tonnes based on a footprint of 1.5 million m3, a depth of 2.5 m and a grade of 400 g/m3

Using the same criteria the total potential tonnage within the 6 km2 5 ppm Sn footprint could be in the order 6000 tonnes ( would support a small scale mining operation based on 30 tonnes/month for ~20 years).

In the main swamp mining areas, the artisanal miners started mining eluvial deposits along the edges of the swamps.

Noting the grades recovered by the artisanal miners from the eluvials determined this deposit type had economic potential.

Using the results of the earlier soil geochemical survey – a close correlation was noted between tin, niobium and tantalum.

The correlation was strong enough to use tin in soils to delineate target areas for concentrations of coltan and tin.

To test this correlation 4 pits were excavated over a strong tin soil anomaly on Wilkinson Hill and a 50 m trench was excavated on the edge of a swamp where alluvial miners were noting high grades in their “gravels”.

3 of the 4 pits “bottomed” in “host” pegmatite with average grades of 16.2% Ta2O5 and 11.52% SnO2 which strongly confirmed the concept of using tin as a pathfinder element.

The trench cut 7 pegmatites which shows a potentially economic density of veining and averaged~350 g/t coltan.

Laboratory assays and in-house XRF analyses indicate coltan samples with > 25% Ta2O5 are common in the coarse + 1mm fractions with the finer fraction assays/analyses show lower values because of the diluting effect of the accessory minerals.

Using these criteria and understanding the geological setting of the coltan being hoisted in pegmatite vein swarms/sheets the Wilkinson Hill in the Matanta area was prioritised for detailed follow up.

Eluvial Coltan (Tin – Gold) Initial Resource

Map of hill - mineralexgroup.com