East-West Cross Section
The airborne MT survey was able to identify a large conductivity 'donut' that lies under the Thor epithermal deposit. In the image to the left, a slice is taken through the geophysical data that shows this feature. The intrusive 'donut' is overlain very silicified rocks of the Broadview Formation, and this forms a plug-like feature over the donut. This area is known to contain very silicified rocks of the Broadview Formation which are suspected to occur on the apex of an underlying intrusive body that occurs in the conductivity 'donut'.
The limited shallow drilling in this area has encountered great widths (over several hundred meters) of sericite and andalusite alteration. In this model, the intrusion is seen as the source of metals that formed the Thor epithermal deposit from a much deeper intrusive body.