Rb–Sr isochron ages, magmatic 87 Sr/ 86 Sr initial ratios, and oxygen isotope geochemistry of the Proterozoic lava flows and intrusions of the East Arm of Great Slave Lake, Northwest Territories, Canada

• Published in: Canadian Journal of Earth Sciences
• Main Authors: Goff, S. P., Baadsgaard, H., Muehlenbachs, K., Scarfe, C. M.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Canadian Science Publishing 1982
• Subjects: General Earth and Planetary Sciences; Northwest Territories; Canada; Great Slave Lake; East Arm; Union Island; Wilson Island
• Online Access: http://dx.doi.org/10.1139/e82-026; http://www.nrcresearchpress.com/doi/pdf/10.1139/e82-026

Two Rb–Sr isochrons from the oldest (Wilson Island Group) and one of the youngest (Pearson Formation) Proterozoic volcanic units in the East Arm of Great Slave Lake give dates and initial ratios of 1810 ± 19 Ma, 0.7051 ± 0.0008, and 1809 ± 30 Ma, 0.7089 ± 0.0004, respectively. These dates restrict t...