The age of the Roberts Arm Group, north-central Newfoundland

• Published in: Canadian Journal of Earth Sciences
• Main Authors: Bostock, H. H., Currie, K. L., Wanless, R. K.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Canadian Science Publishing 1979
• Subjects: General Earth and Planetary Sciences; Notre Dame Bay; Mansfield; Newfoundland
• Online Access: http://dx.doi.org/10.1139/e79-055; http://www.nrcresearchpress.com/doi/pdf/10.1139/e79-055

Felsites from the Roberts Arm Group have yielded a Rb–Sr isochron age of 447 ± 7 Ma, with an initial 87 Sr/ 86 Sr of 0.7063, and a genetically related granite pluton has yielded an isochron age of 464 ± 13 Ma, with an initial ratio of 0.7064. The Mansfield Cove oceanic plagiogranite complex, which i...