Silica-Kaolin Deposits of Algocen Mines Limited

The commercial potential of a silica- kaolin deposit that occurs on the banks of and close to the Missinaibi River in the District of Cochrane, Ontario, is under evaluation by Algocen Mines Limited. The geological features of the deposit, as well as its probable origin, are described. Mineralogical analysis of the deposit samples indicates that the principal minerals are quartz and kaolinite clay; it is estimated that about 20 per cent of the deposit is kaolin clay. The impurity minerals present are: a slightly magnetic Fe-Ti oxide mineral, goethite, muscovite mica, tourmaline, staurolite, anatase and zircon. Laboratory research studies are in progress to develop and evaluate suitable methods for the separation of silica sand from kaolin. Results to date indicate that good-quality silica sand with an Fe,0 3 content in the range of 0.012 to 0.025 per cent can be produced. It appears that the clay portion can also be beneficiated to yield products meeting commercial requirements. It has been possible to beneficiate a portion of theetlay to obtain the particle size distribution now specified by industry. However, research is continuing to develop suitable separation and beneficiation methods which can produce kaolin clay meeting all the commercial requirements.
Keywords: Clay, Clays, Deposits, Drilling, Hearst clay., Hearst Kaolin, Lower Cretaceous, Missinaibi River, Silica Sand, Kaolin, Materials, Ontario, Sand, Silica sand
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