Hot and Heterogenous High‐ 3 He/ 4 He Components: New Constraints From Proto‐Iceland Plume Lavas From Baffin Island
Résumé
Key Points: Baffin Island-West Greenland high-3 He/ 4 He lavas are more geochemically depleted than any other high-3 He/ 4 He lavas globally. The isotopic composition of the high-3 He/ 4 He mantle source in the Iceland plume has evolved through time. Baffin Island and West Greenland primary melts record hotter temperatures than high-MgO MORB, consistent with a deep, dense plume source.
Domaines
Géochimie
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Willhite_et_al-2019-Geochemistry,_Geophysics,_Geosystems.pdf (2.55 Mo)
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