Abstract:
The approximately 1.9 billion-year old Great Slave Lake shear zone (GSLsz) is a crustal-scale transform fault, with a total length >1000 km and a width of ~25 km, exposed in northwestern Canada. As a type example of a deeply eroded continental transform boundary, the GSLsz preserves a record of how tectonic stresses are distributed within continental lithosphere. In this seminar I will present recent metamorphic, geochronological and microstructural findings all focused on using the GSLsz to produce a naturally calibrated stress-depth profile for continental crust.
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