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Ontario |
Bridge River
Ontario has been the focus of diamond explorers during several episodes of exploration. Discoveries in the Attawapiskat region, around Kirkland Lake and Cobalt, and near Wawa, confirm that the mantle root underlying much of central Ontario is fertile for diamonds. Additionally, the region is structurally permissive, being traversed by northwest-southeast trending diabase dykes, which form part of the Matachewan and Sudbury dyke systems, and by northeast-southwest dykes of the Abitibi and Marathon dyke swarms. A series of fault structures lying sub-parallel to the dykes cut the Archean basement units. Studies of seismic data confirm that a cool mantle underlies most of the southern part of Hudson Bay, all of James Bay and the James Bay Lowlands, and extends southerly almost to the northern edge of the Michigan Basin.
Diamond Exploration Inc. has identified a prospect area within this region that has anomalous concentrations of kimberlite indicator minerals within river gravels. The subcalcic composition of pyrope garnets suggests that the indicator grains were eroded from significantly diamondiferous sources. A number of sub-circular to circular magnetic anomalies are present up-ice of the anomalous gravels.
Proposed work will comprise stream sediment sampling and prospecting to delineate source areas of the kimberlite indicator minerals and to provide an initial assessment of the magnetic anomalies. Prospecting and sampling of known ultramafic breccias in the area will also be carried out. It is anticipated that this work will be followed up by detailed airborne and ground magnetic surveys, additional staking, till sampling and prospecting, and drill testing of priority targets..
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