Nd isotope mapping of a cryptic continental suture, Grenville Province of Ontario

Nd isotope data are presented for 70 Archean and Paleoproterozoic grey gneisses from the Grenville Parautochthonous belt in Ontario. These data constrain an age boundary which separates partially reworked Archean basement to the northwest from a Paleoproterozoic arc terrane to the southeast. This boundary is interpreted as a crustal-scale continental suture, but its exposure is cryptic due to metamorphic recrystallisation during the Grenville …