Broadband array observations of the 300 km seismic discontinuity

  title={Broadband array observations of the 300 km seismic discontinuity},
  author={Nicholas C Schmerr and Byron M. Kelly and Michael A. S. Thorne},
[1] Intermittent seismic discontinuities near 250–300km depth beneath South America and the Pacific basin are detected with high-resolution seismic array methods that use SS and PP precursors recorded at the High Lava Plains Seismic Experiment and the EarthScope Transportable Array. The transformation of coesite to stishovite in an eclogite-rich mantle composition produces a seismic discontinuity near 300km depth; lateral changes in basalt fraction of the upper mantle will thus produce an… CONTINUE READING