The distribution of long-lived radiogenic isotopes along the world's mid-ocean ridges can be used to map geochemical domains, reflecting contrasting refilling modes of the upper mantle. Refilling of the upper mantle in the Atlantic and Indian domains is slow and confined to localized upwellings, whereas in the Pacific, upwellings are comparatively much wider and more rapid.
- Christine M. Meyzen
- Janne Blichert-Toft
- Francis Albarède