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Location: 4 km W from Kanye, Botswana
2010 Winston Park Drive 2nd FloorOakvilleOntario, CanadaON L6H 5R7
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The manganese mineralisation at K.Hill occurs primarily as a supergene-enriched Mn-shale present in two distinct horizons in the upper portion of a larger shale package within the Black Reef Quartzite Formation of the Transvaal Supergroup. The Mn-shale horizons are overlain by a hard chert dolomite breccia (CDB) unit. In plan, the northern part of the K.Hill deposit is approximately kidney-shaped, reflecting the pattern of outcrop along the edges of the hill, while to the south, there is outcrop expression.The Mn-shale outcrops along the northerly scarp slope of the Kgwakgwe Hill and dips into the hill. The strata at K.Hill dip gently toward the NW, at an average of approximately 5° to 10°, and S and Z parasitic folding is common. Numerous outcrops display parasitic folding, with local dips varying from 45° to almost subvertical. This is not consistent with the overall shallow dip of the Mn-shale and adjacent units. Where the deposit outcrops in the north, the Mn-shale unit is kidney shaped. The unit varies between approximately 2 m and 15 m thick, with an average thickness in the order of 4 m and has a delineated extent of approximately 1,900 m N-S and 350 m E-W. Some of these thicker intersections may be local fold duplications of a single horizon. In general, the Southern Extension Area shows greater thicknesses of the mineralisation than in the north.The mineralised horizons have been interpreted as two main packages: the Upper Mn-shale Horizon A and the Lower Mn-shale Horizon B, both of which dip shallowly (5° to 10°) toward the NW. The Upper Mn-shale, which hosts the highest-grade manganese oxide mineralisation, varies between approximately 2 m and 15 m in thickness, with an average thickness of 4 m. Based on the existing interpretation, the Upper Mn-shale has been divided, based on grade values, into a continuous high-grade core with distinct, although slightly less continuous, lower-grade zones in the immediate footwall and hanging wall. The Lower Mn-shale horizon ranges from 1 m to 12 m in thickness with an average thickness of 3.5 m and does not show the distinct banding of grade seen in the Upper Mn-shale horizon. The two main mineralised horizons are separated by approximately 4 m of shale waste rock.The Southern Extension Area is separated from the Northern Area of the resource by several NNW-SSE trending faults, which progressively downthrow the mineralised horizons to the south.
