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Natural Resources Canada > Earth Sciences Sector > Priorities (2002-2006) > Northern resources development > Western Churchill Metallogeny Project
Western Churchill Metallogeny Project Disassembling a tectonic puzzle: towards a revised subdivision of the western Churchill Province
Sally Pehrsson: 32nd Annual Yellowknife Geoscience Forum November 15-18, 2004
New subdivisions and phases of Paleoproterozoic reworking are proposed for the Western Churchill Province. The 2.75-2.58 Ga Rae domain is characterized by involvement of 3.4-2.85 Ga crust, and has an age zonation perpendicular to the NE-trending regional structure grain. The Archean Hearne domain is subdivided into the contaminated northwestern and juvenile central Hearne subdomains on the basis of crust formation ages, crustal contamination and tectonothermal reworking. Whether the Rae, northwestern Hearne, and central Hearne have been intact since the Archean or the central Hearne was accreted in the Paleoproterozoic remains to be tested. The WCP's long history of Paleoproterozoic reworking between 2.5-1.8 Ga owes much to its situation in an upper plate setting between two major Paleoproterozoic orogens characterized by variable plate coupling.
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