Seismic evidence for silicate melt atop the 410-km mantle discontinuity

  title={Seismic evidence for silicate melt atop the 410-km mantle discontinuity},
  author={Justin Revenaugh and S. A. Sipkin},
LABORATORY results demonstrating that basic to ultrabasic melts become denser than olivine-rich mantle at pressures above 6 GPa (refs 1–3) have important implications for basalt petrogenesis, mantle differentiation and the storage of volatiles deep in the Earth. A density cross-over between melt and solid in the extensively molten Archaean mantle has been inferred from komatiitic volcanism4–6 and major-element mass balances7, but present-day evidence of dense melt below the seismic low-velocity… CONTINUE READING
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