The Chidliak kimberlite province covers an area of 40 × 70 km on the eastern Hall Peninsula, southeastern Baffin Island, Nunavut, between Frobisher Bay and the Cumberland Sound (Fig. 1). The eastern Hall Peninsula is an Archean gneissic terrain, into which all the Late Jurassic–Early Cretaceous aged kimberlites (156.7–139.1 Ma; Heaman et al., 2012) intruded. At present, there is no consolidated Phanerozoic sedimentary cover on the Hall Peninsula; however, a great number of sedimentary rock xenoliths yielding conodont microfossils were entrained by the kimberlites. These xenoliths suggest that Upper Ordovician and Lower Silurian strata with a total...

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