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MacDonald Mines Provides Update on Exploration Programs of Both Holdsworth and Charlevoix: Composite Samples Up to 99.39% High Purity Silica From Charlevoix

TORONTO, ONTARIO–(Marketwired – Feb. 23, 2017) – MacDonald Mines Exploration Ltd. (TSX VENTURE:BMK) (“MacDonald Mines”, or the “Company”) has begun exploration programs at both its Wawa-Holdsworth Gold Project near Wawa, Ontario, and its Charlevoix Silica Property located approximately 42 kilometres north of Baie-Saint-Paul, Quebec. The sampling program conducted at Charlevoix suggest that the high purity quartzite unit mined at the Sitec Silica Mine extends on the property.