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Location: 136 Km NW from Merredin, Western Australia, Australia
Unit 8-9, 88 Forrest StreetCottesloeWestern Australia, Australia6011
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The Cadoux (HPA) Project area is underlain by weathered granitoid Archaean rock of the Yilgarn Granites is the likely parent material for the kaolin. Here, deep weathering of the feldspathic and ferromagnesian minerals within the metamorphosed granitic has resulted in the formation of kaolinite. There is no outcrop but recognizable granitoid fragmental rocks are sometimes present just below surface. The crust of the overburden comprises gravel and sands over reddish to off-white clay. White kaolin underlies the overburden followed by weathered, partial oxidized and then fresh granitoids at depth.The recent drilling at the property has revealed a weathering profile which is very common in Western Australia with the granitoid rocks, deeply weathered forming a leached, kaolinized zone under a lateritic crust. Analysis at the Laboratory shows particle size distributions are typical of “primary style” kaolin clays produced from weathered granites. The crust of overburden comprises gravel and sands over reddish to off-white clay to an average depth of 5 m. White kaolin then averages approximately 16 m before orange to yellow sandy and mottled clays are intersected which are followed by recognisable rounded granitoid material. The thickness of the kaolin profile varies from less than 1 m to a maximum of 22 m. Fresh granitoids are found at depths of between 10 m and 30 m. All kaolin resources are within 4 m to 11 m of the surface.The upper low K2O zone (K2OCD= 1) is generally thicker up to roughly 20 m than the lower zone (‘high’ K2O – K2OCD=2) which is up to approximately 10 m thick.The mineralisation is close to horizontal, dipping on average about 1° towards 070°. The strike extent is roughly 1 km and across strike width is roughly 500 m for the bulk northern/central part of the deposit, with the total north south dimension being ~1.4 km including the un-mineralised central/south portion (see plan view diagram in body of report). The combined thickness of the mineralisation zones is greatest in the north-eastern part of the deposit (~15 m to 25 m), thinning to the northwest (~4m) and southwest (~4 m to 12 m).
