Hot and Heterogenous High‐ 3 He/ 4 He Components: New Constraints From Proto‐Iceland Plume Lavas From Baffin Island

• Published in: Geochemistry, Geophysics, Geosystems
• Main Authors: Willhite, Lori, Jackson, Matthew, Blichert-Toft, Janne, Bindeman, Ilya, Kurz, Mark, Halldórsson, Sæmundur, Harðardóttir, Sunna, Gazel, Esteban, Price, Allison, Byerly, Benjamin
• Other Authors: University of California Santa Barbara (UC Santa Barbara), University of California (UC), Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement (LGL-TPE), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2019
• Subjects: [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry; Baffin Island; Greenland; Baffin; Iceland
• Online Access: https://hal.science/hal-02991497; https://hal.science/hal-02991497/document; https://hal.science/hal-02991497/file/Willhite_et_al-2019-Geochemistry,_Geophysics,_Geosystems.pdf; https://doi.org/10.1029/2019gc008654

International audience 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.