Rwanda

• Country profile
• Permits
• Exploration programme
• Exploration results

Exploration results

TransAfrika has drilled 33 diamond drill holes on a 1.6km soil anomaly which have produced an inferred resource of 257 000oz gold at an average grade of 1.5g/t. Mineralisation is open down dip and along strike. Gold grades increase with depth from 1.2g/t in the oxide zone to 1.7g/t in the sulphide zone. Selected intersections from this drilling are tabulated below.

Selected drilling results

Hole	From (m)	To (m)	Interval (m)	Au (ppm)	cmg/t
RB09_29	181	187	6	4.87	2922
RB09_29	181	182	1	27.8	2780
RB08_05	109	116	7	3.4	2380
RB08_05	109	111	2	11.22	2244
RB09_31	96.85	107	10.15	1.42	1441
RB09_32	104	109	5	2.79	1395
RB08_19	82	84	2	6.78	1356
RB08_11	36.52	40.3	3.78	3.15	1191
RB09_32	105	106	1	11.8	1180
RB09_31	98.6	101.05	2.45	4.5	1103
RB08_03	20	21.5	1.5	7.14	1071
RB09_32	150	153	3	3.56	1068
RB09_27	159	166	7	1.2	840
RB09_30	193	195	2	4.08	816
RB09_23	94	95	1	7.64	764
RB08_07	63	64	1	6.98	698
RB09_23	68.61	70.01	1.4	4.24	594
RB09_27	141	142	1	5.32	532
RB09_28	130	131	1	4.7	470
RB09_29	8.53	9	0.47	9.23	434
RB09_25	122	123	1	4.32	432
RB09_28	182	183	1	4.17	417

Modelling results

Modelling of the available data provides an inferred resource of 257 000oz gold. Higher grade zones of mineralisation occur within broad low grade envelopes. Using a 0.5g/t cut-off shows 14 higher grade envelopes developed within strike lengths from 100m to 1600m and down dip to 200m and often open at depth. The width of these envelopes varies in thickness from 1m to 8m with separation between shells varying from 3m to 15m. Exploration targets down dip and along strike exist and it is believed that further drilling will increase the resource significantly.

Isometric view of Broad Grade Shells, looking north-west

Isometric view of Steep > 0.5ppm Au Grade Shells, looking north-west

Isometric view of Grade Shells (~750° on 50°)

Geology of the Byumba Concession

All boreholes drilled show similar characteristics of geology and mineralisation. The borehole core is primarily phyllite with alternating bands of shale and fine sands and generally soft and fractured in weathered zones. A study on the structural controls on the gold mineralisation in the sulphide zone shows gold to be associated with pyrite that selectively replaces sandstone layers in small-scale recumbent isoclinals fold noses. These folds occur in bedding parallel zones of higher shear strain.

In general, the mineralised zone is characterised by broad low-grade gold intersections with high-grade assays over shorter lengths confined within fairly steep dipping bedding parallel zone. This style of mineralisation appears to be the signature of the geometry of the deposit.

Rubaya: potential to increase resource along strike

Rubaya: potential to increase resource in depth

Byumba project – Mineral Resource January 2010

		Inferred Mineral Resources
Weathering zone ounces	Tonnage (Kt)	Au (g/t)	Recovery %	SG	Au
Oxide	701	1.22	77	2.35	27 000
Transition	2 606	1.38	82	2.55	112 000
Fresh	2 245	1.69	96	2.75	118 000
Total	5 552	1.48	87	2.61	257 000

Most importantly, the target remains open to the north-west and at depth, providing still further upside potential. The gold grade within the deposit increases with depths from 1.22g/t in the oxide zone to 1.69g/t in the sulphide zone