An interpretation of a seismic cross section of oceanic crust: an example from Godzilla megamullion, Philippine Sea

Abstract

We calculated the variation of the seismic properties with two ideal mineral compositions: plagioclase 50% + clinopyroxene 50% (pl50cpx50) and plagioclase 50% and amphibole 50% (pl50amp50). These two compositions could explain a P-wave velocity model for the Godzilla megamullion from 6 km/s for pl50amp50 to 7 km/s for pl50cpx50, suggesting that this oceanic crust may be significantly hydrated.