Journal article

### Postspinel transformations and the width of the 670-km discontinuity: a comment on "Postspinel transformations in the system Mg2SiO4-Fe2SiO4 and some geophysical implications' by E. Ito and E. Takahashi

Abstract:

In their recent paper dealing with postspinel transformations in the system Mg2SiO4-Fe2SiO4, Ito and Takahashi [1989] showed that the reaction (Mg,Fe)2SiO4 = (Mg,Fe)SiO3 + (Mg,Fe)O (spinel = perovskite + magnesiowustite) occurs over a very narrow pressure interval, at 1600°C, for values of Fe/(Fe+Mg) of between 0.0 and 0.3. It is the purpose of this comment to point out that the argument for a narrow transition interval can be independently confirmed and strengthened using Ito and Takahashi's...

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Institution:
University of Oxford
Division:
MPLS
Department:
Earth Sciences
Role:
Author
Journal:
Journal of Geophysical Research
Volume:
95
Issue:
B8
Publication date:
1990-01-01
ISSN:
0148-0227
Source identifiers:
177597
Language:
English
Pubs id:
pubs:177597
UUID:
Local pid:
pubs:177597
Deposit date:
2012-12-19