Thy, P. 1982. Richterite-arfvedsonite-riebeckite-actinolite assemblage from marid dikes associated with ultrapotassic magmatic activity in central west Greenland. International Kimberlite Conference: Extended Abstracts. 3, (Sep. 1982), 247–249. DOI:https://doi.org/10.29173/ikc2367.