The 2.5 Ga Duxbury massif, Quebec : a remobilized piece of pre-3.0 Ga sialic basement(?)

• Published in: Canadian Journal of Earth Sciences
• Main Authors: Verpaelst, P., Brooks, C., Franconi, A.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Canadian Science Publishing 1980
• Subjects: General Earth and Planetary Sciences; Canada; Eastmain
• Online Access: http://dx.doi.org/10.1139/e80-001; http://www.nrcresearchpress.com/doi/pdf/10.1139/e80-001

The Duxbury massif, Eastmain District, Quebec, is a complex tonalitic intrusion that is internally divisible into a homogeneous border zone of granodiorite (Rb–Sr total-rock isochron age = 2500 ± 85 Ma; initial 87 Sr/ 86 Sr = 0.7023 ± 0.0003) and a heterogeneous core zone of tonalite (Rb–Sr total-ro...