Evidence for an Early Proterozoic crustal province in the North Atlantic region

Published Sm-Nd data for the Ketilidian belt of Greenland, the Rockall bank in the North Atlantic, and the Islay-Inishtrahull block of the British Isles are used to suggest the existence of a single Early Proterozoic crustal province in the North Atlantic region with a crustal formation age of c. 1.96 Ga. The three sub-provinces also have similar metamorphic histories, as documented by Sr and Pb isotope data. They probably represent one or more …