Density of MORB eclogite in the upper mantle
作者： Ichiro Aoki , Eiichi Takahashi
DOI: 10.1016/J.PEPI.2003.10.007
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摘要: Abstract In order to study the role of eclogite (subducted oceanic crust) in geodynamics, we carried out high-pressure experiments on natural mid-oceanic ridge basalt (MORB) using a multi-anvil apparatus. We determined phase relations MORB as function pressure and temperature range 1200–1700 °C pressures from 5 14 GPa. The present results differ previous ([Earth Planet. Sci. Lett. 77 (1986) 245]; conducted at 1200 °C) follows: (1) coesite (Coe) or stishovite (St) appears throughout studied range; (2) clinopyroxene/garnet (Cpx/Gar) ratio is smaller, particularly low-pressure (
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