Hot and Heterogenous High‐ 3 He/ 4 He Components: New Constraints From Proto‐Iceland Plume Lavas From Baffin Island
- Willhite, Lori, N
- Jackson, Matthew, G
- Blichert-Toft, Janne
- Bindeman, Ilya
- Kurz, Mark, D
- Halldórsson, Sæmundur, A
- Harðardóttir, Sunna
- Gazel, Esteban
- Price, Allison, A
- Byerly, Benjamin, L
DOIAbstract
International audienceKey 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
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