Helium and lead isotope geochemistry of the Azores Archipelago

New helium and lead isotopic data for basalts from the Azores archipelago (North Atlantic) show that the Azores have 4He/ 3He ratios both higher and lower than MORB values. Good covariations of helium and lead isotopes are observed at the scale of the archipelago, and suggest the coexistence of two...

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Veröffentlicht in:	Earth and planetary science letters 1999-05, Vol.169 (1), p.189-205
Hauptverfasser:	Moreira, Manuel, Doucelance, Régis, Kurz, Mark D., Dupré, Bernard, Allègre, Claude Jean
Format:	Artikel
Sprache:	eng
Schlagworte:	Azores Earth Sciences Geochemistry helium isotope ratios lead magmas mixing Sciences of the Universe Volcanology
Online-Zugang:	Volltext
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