Hot and Heterogenous High‐ 3 He/ 4 He Components: New Constraints From Proto‐Iceland Plume Lavas From Baffin Island
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 We...
Published in: | Geochemistry, Geophysics, Geosystems |
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Main Authors: | , , , , , , , , , |
Other Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2019
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Subjects: | |
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 |
Summary: | 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. |
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