Schematic model of flood basalt generation.
(1) Partial melting of the mantle generates flood basalt parental melts that subsequently evolve, assimilate, and mix in lithospheric magma chambers.
(2) Parental melts of ferropicrites were generated deep in the asthenospheric mantle and did not subsequently mix with lithospheric materials.
(3) Parental melts of Vestfjella alkaline rocks were generated in the lithospheric mantle.
(© Jussi Heinonen)
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