Non-kimberlitic Diamond Sources
“Torngat Dykes” circa 550Ma dykes of northern Labrador with analogies on Greenland - impetus for magmatism may be related to Iapetus Ocean spreading
Parker Lake Dyke - C.I.F. related minettes with prodigious microdiamond counts (1832+/-28Ma; diamonds/22kg)
Phreatomagmatic Christopher Island Formation volcanics and associated diatremes in Dubawnt Lake region - Proterozoic mantle metasomatism
Lamproite dykes on Baffin Island (Proterozoic)