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Location: 4 km W from Kanye, Botswana
2010 Winston Park Drive 2nd FloorOakvilleOntario, CanadaON L6H 5R7
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Deposit TypesThe manganese mineralisation at the K.Hill Project occurs as a supergene-enriched shale (Mn-shale) within the Black Reef Quartzite Formation.Local geologyThe mineralisation at the K.Hill Project is primarily associated with the upper shale horizon of the Black Reef Quartzite Formation. The quartzite package underlying the shales rests unconformably on Archaean felsites of the Kanye Volcanic Group. The shales in turn are overlain by the chert breccias of the Paupone Dolomite Group, which suggests non-deposition of the intervening dolomites or a massive unconformity. The Kgwakgwe Chert Breccia Formation in the Kanye area can be subdivided into two main varieties: • a dark-brown chert breccia with milk-white angular chert fragments, cemented together by brown haematitic material • a reddish-brown chert breccia with abundant jaspilitic fragments and a high content of jasper in the matrixThe Mn-shale horizon extends at surface in outcrop in the north and to the south below surface, where its presence has been intersected in drillholes. To date, the known strike length of the horizon is 1.9 km. The stratigraphy has been duplicated by thrusting in places, and, to the south, the mineralised horizon has been extensively downfaulted by steeply dipping east-north-northeast trending faults. The shales have been intensely folded and slumped in the vicinity of these dislocations, and in addition, subparallel breccia zones and quartz veining may be evident.The entire Transvaal package is cut out against the Waterberg sediments to the west of Kgwakgwe Hill along what are thought to be northerly trending faults.The Mn-shale outcrops along the northerly scarp slope of the Kgwakgwe Hill and dips into the hill. The strata at the K.Hill Project dip gently toward the northwest, at an average of approximately 5° to 10°. 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 to 15 m thick, with an average thickness in the order of 4 m and has a delineated extent of approximately 1,900 m north-south and 350 m east-west. Some of the 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 outcrop defining the limit of the Mn-shale is well defined in the east, with the areas to the west being partially covered by alluvium and/or exposed by historical surface mining into the hillside.
