The source for the isotopically-enriched Hawaiian magmas contains peridotites that experienced near-surface melting prior incorporation in the plume.
Vincent Salters
Posted inEditors' Highlights
Pliocene Conveyer Belt in the Pacific
Ocean Drilling Program cores and helium isotopes put better constraints on the ocean circulation in the north Pacific.
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The Depleted Mantle Merry-Go-Round
Abyssal peridotites show through their isotopic composition a complex history. From differences we can infer the existence of ultra depleted mantle and an uneven contribution to ridge magmatism.
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The Crust Travels to the Earth’s Core and Back in Record Time
Subduction of continental crust around the Gondwana supercontinent may explain the mantle Dupal anomaly of the southern hemisphere.
Posted inEditors' Highlights
Zircons and Plate Tectonics
New data on ancient zircons points to a transition from stagnant lid to subduction style tectonics at 3.6 Ga ago.