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Martison carbonatite complex, South of Ridge Lake Area, Cochrane District, Ontario, Canada

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Latitude & Longitude (WGS84): 50° 18' 53'' North , 83° 24' 53'' West
Latitude & Longitude (decimal): 50.3147222222, -83.4147222222

A carbonatite complex approx. area of 19 km² delineated by aeromagnetic survey and confirmed by drilling. The Martison Lake Carbonatite Complex occurs near the north margin of the Archean craton adjacent to the younger cover rocks of the Hudson Bay Lowlands. The complex is overlain by a thin mantle of Cretaceous sediments and 30-45 m of coarse glacial till. The carbonatite has a strong magnetic signature that is readily recognizable on regional airborne maps. The Martison Carbonatite complex is one of a number of alkaline intrusions including carbonatite, kimberlite and alnoite complexes that intrude the Archean shield along the Kapuskasing Structure.

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SAGE, R.P. (1981) Geology of the Martison carbonatite complex. Ontario Geological Survey Open File Report 5420, 99p.
Ontario Ministry of Northern Development and Mines MDI Number: MDI42J06SW00004

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