Nd isotope mapping of the Frontenac Terrane in southwestern Grenville Province

Nd isotope analyses are presented for granitoid rocks from the western part of Frontenac Terrane in the Grenville Province of Ontario. The depleted mantle model (T DM ) ages show no correlation with the silica content of the rocks, but instead correlate with geographical location, suggesting that the T DM ages are indicative of regional crustal formation age and do not result from mixing between sources with different provenance ages. Based on …