Early Aphebian basaltic volcanism in the southern District of Keewatin, Northwest Territories

• Published in: Canadian Journal of Earth Sciences
• Main Author: Beavon, Roy V.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Canadian Science Publishing 1976
• Subjects: General Earth and Planetary Sciences; Northwest Territories; Canada; Spi Lake; Keewatin
• Online Access: http://dx.doi.org/10.1139/e76-103; http://www.nrcresearchpress.com/doi/pdf/10.1139/e76-103

A thin formation of folded mafic flows resting unconformably on Archean basement is informally named the Spi Lake basalt. Stratigraphic, structural, and textural evidence suggests that these lavas were probably fed from a diabase dike swarm dated at 2250+ m.y. by the Geological Survey of Canada. The Spi Lake basalt is overlain by conglomerate that may represent the base of the Hurwitz Group.