Metal Earth Geophysics Report - Summer 2017

Metal Earth is a seven-year study to determine how mineralized areas differ from those that are not mineralized and to better understand mineral endowment in Precambrian Era rocks. As the rocks in mineralized vs poorly mineralized greenstones are similar, any differences must lie in the mid to lower crust. To better understand this problem, transects perpendicular to strike were developed, along which Metal Earth is doing reflection seismic, magnetotellurics and supporting geology and geophysics. Included in the supporting geophysics is measurement of gravity data and magnetic susceptibility data. This report summarizes gravity data and physical rock properties data acquisition across the Rouyn-Noranda, Amos-Malartic and Chibougamau Transects as part of the Metal Earth project. Gravity data acquisition in the project includes data collection, QA/QC, initial field processing and liaising with the coordinator. In conjunction, magnetic susceptibility data and rock samples for density measurements were taken on outcrops along the transects. These rock properties will be used to shed light on the surficial magnetics of the regions and compare them to total magnetic signatures (magnetic susceptibility) and to associate outcrops with lithologies and augment and assist the gravity modelling (density). The acquired gravity and rock property data will be integrated with seismic and magnetotelluric models to provide concise and reliable models of the subsurface.

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