Trans-crustal structural control of co2-rich extensional magmatic systems revealed at mount erebus antarctica

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SUMMARY

    The alkali-rich Erebus phonolite has been modeled as evolving by fractional crystallization of a parental basanite sourced from an enriched upper mantle through a series of intermediate composition magma reservoirs3,8,9. Its desiccating effect raises the solidus temperature of the magma promoting crystallization and differentiation. The observed vertical magnetic_field transfer function or induction arrows K where Hz=-K · H point toward regions of lower resistivity ("Methods" and Supplementary Information). The vertical magnetic_field transfer function data hence were down-weighted with an error floor of 0.075 and restricted to periods less than . . .

     

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