The post-spinel transformation in Mg2SiO4 and its relation to the 600-km seismic discontinuity
Article Abstract:
Research examining the causes of the 660-km seismic discontinuity in the mantle of the Earth is presented. Particular attention is given to experiments of the transformation of (Mg, Fe)2SiO4 from ringwoodite to (Mg,Fe)O-magnesiowustite and (Mg, Fe)SiO3-perovckite.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2001
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Deeper understanding
Article Abstract:
The lower most part of the Earth's mantle is called D" region historically. The physical properties of the high-pressure crystal structure with seismic observation in the part of the mantle are analyzed.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2004
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Elasticity of forsterite to 16 GPa and the composition of the upper mantle
Article Abstract:
The elastic moduli of single crystals of forsterite (alpha-Mg2SiO4) obtained at pressures between 3.1 and 16.2 GPa show that the elastic moduli are directly related to pressure. With the assumption of a homeogenous mantle composition, the Earth's mantle at 410 km depth has less than 40% olivine which is less than that determined by the peridotite-based upper-mantle models. The elastic moduli are calculated by the Brillouin scattering in a diamond anvil cell.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
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