7 research outputs found
Géochimie isotopique des basaltes de la ride médio-océanique de l'Atlantique Equatorial
No full textA major, 1000-km long geochemical anomaly culminating at 1.7°N is observed in basalts erupted along the axis of the Mid-Atlantic Ridge across the Equatorial fracture zones. The anomaly is probably caused by the Sierra Leone mantle plume now in off-ridge position. The aseismic Sierra Leone and Ceara Rise reflect the activity of this hotspot in the past, when it was centered over the ridge axis.</p
Helium isotope composition of the early Iceland mantle plume inferred from the Tertiary picrites of West Greenland.
No full textOne hundred million years of mantle geochimical history suggest the retiring of mantle plumes is premature.
No full textInternational audienc
