Peridotites from the Horoman massif have the least radiogenic lead isotope ratios reported from any mantle material, and unlike any inferred from the compositions of mid-ocean ridge basalts. These data hint at the existence of ancient mantle domains that are not sampled by mid-ocean ridge basalts.
- Sanjeewa P. K. Malaviarachchi
- Akio Makishima
- Eizo Nakamura
