Eastern Section Meeting

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The Eastern Ontario aeromagnetic survey

Abstract

The Precambrian basement beneath the Paleozoic of eastern Ontario is poorly known due to low resolution aeromagnetic coverage (800 m line spacing) and limited drilling. To improve our knowledge, in late 2013, 34,724 line km of aeromagnetic data were collected at 400 m line spacing over a 12,515 km2 area of eastern Ontario east of longitude 76.51W to the Quebec border. These data were recently released as Ontario Geological Survey Geophysical Dataset 1075. This presentation summarizes both the results of the survey and the preliminary interpretation of the underlying basement geology, based on tracing known surface geology beneath the Paleozoic, which is assumed to be magnetically transparent.