Host Rocks at Thor

Photograph of some of the bedded metasedimentary and volcaniclastic at the north end of the Thor project. Resistant rocks form large ridges and hilltops.

Host Rocks (Jowett and Sharon Creek Formations)

The host rocks at Thor are metasediments and meta-volcaniclastic rocks that are broadly lumped into the Jowett and the Sharon Creek Formations. These rocks were deposited in a sedimentary basin on the west side of the North American craton at some time in the Lower Paleozoic.

Greywacke is accompanied by volcaniclastic rocks and is intercalated throughout the rock succession at Thor. The Broadview Formation is devoid of any volcaniclastics and forms hard, resilient rock formations.

The sedimentary rocks contained significant amounts of bitumens and hydrocarbons, and in places the organic hydrocarbons have been converted to inorganic carbon (graphite) due to contact metamorphism.

All of the host rocks at Thor have been folded into a broad anticline structure called the Silver Cup Anticline, and the Finkle Syncline. All of the epithermal mineralization at Thor was emplaced after the creation of the Silver Cup Anticline along NNW-trending faults.

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