Excesses of 142Nd previously found in 3.7-billion-year-old rocks from Isua, southwest Greenland, imply their derivation from a depleted mantle formed in the Hadean eon; the signature of a complementary Hadean enriched reservoir is now reported in 3.4-billion-year-old mafic dykes found in Isua.
- Hanika Rizo
- Maud Boyet
- Jean-Louis Paquette