
Peridotites from the Gakkel Ridge and East Pacific Rise record oxygen fugacity (fO2) more than four orders of magnitude below the mantle average, indicating ancient, high-temperature melting events.


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Analysis of peridotites reveals ultralow oxygen fugacity, suggesting that rafts of ancient, ultrareduced mantle were generated by deep melting at high temperatures and&nbsp;continue to circulate in the modern mantle, although they&nbsp;contribute little to modern ridge volcanism.

Deep, hot, ancient melting recorded by ultralow oxygen fugacity in peridotites - Nature

ultralow-oxygen-fugacity-in-peridotites-reveals-deep-hot-and-ancient-melting-events


Ultralow Oxygen Fugacity in Peridotites Reveals Deep, Hot, and Ancient Melting Events
