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| Western Churchill Metallogeny Project |
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Natural Resources Canada > Earth Sciences Sector > Priorities (2002-2006) > Northern resources development > Western Churchill Metallogeny Project
Western Churchill Metallogeny Project The tectonometamorphic history of the western Churchill province: the emerging picture from linked metamorphic and in-situ geochronologic studies
Robert Berman
Important highlights of the tectonometamorphic history of the WC include: (1) determination of a ca. 2.35 Ga age for the S1 fabric in the Committee Bay belt, and proposed linkage of this to collisional orogenesis on the western flank of the Rae domain; (2) determination of a ca. 1.85-1.82 Ga age for the S2 fabric in the Committee Bay belt, with metamorphism being a response to crustal thickening thought to be driven by ca. 1.88-1.87 Ga microcontinent-Rae domain collision; (3) suggestion that the Rae-Hearne boundary zone in the Chesterfield Inlet area evolved via ca. 2.64 accretion of the NW Hearne, 2.61-2.58 Ga continental arc magmatism, 2.55-2.50 Ga collision between the Rae-NW Hearne and Craton X (possibly the Central Hearne) with Rae-NW Hearne boundary reworked in the Big Lake shear zone; (4) proposition that ca. 1.9-1.89 high-P metamorphism in the Chesterfield Inlet region was caused by microcontinent collision during the early stages of convergence associated with the "Trans-Hudson" orogeny.
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