Catalysis of the olivine to spinel transformation by high clinoenstatite

Thomas Sharp, D. C. Rubie

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Although enstatite is a major constituent of the Earth's upper mantle and subducting lithosphere, most kinetic studies of olivine phase transformations have typically involved single-phase polycrystalline aggregates. Transmission electron microscopy investigations of olivine to spinel and modified spinel (β phase) reactions in the (Mg,Fe)2SiO4-(Mg,Fe)SiO3 system show that transformation of olivine in the stability field of spinel plus β phase begins with coherent nucleation of spinel on high-clinoenstatite grains. These observations demonstrate that high clinoenstatite can catalyze the transformation by enhancing nucleation kinetics and therefore imply that secondary phases can influence reaction kinetics during high-pressure mineral transformations.

Original languageEnglish (US)
Pages (from-to)1095-1098
Number of pages4
JournalScience
Volume269
Issue number5227
StatePublished - Aug 25 1995
Externally publishedYes

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Catalysis
Transmission Electron Microscopy
Minerals
Pressure
spinell
olivine

ASJC Scopus subject areas

  • General

Cite this

Catalysis of the olivine to spinel transformation by high clinoenstatite. / Sharp, Thomas; Rubie, D. C.

In: Science, Vol. 269, No. 5227, 25.08.1995, p. 1095-1098.

Research output: Contribution to journalArticle

Sharp, T & Rubie, DC 1995, 'Catalysis of the olivine to spinel transformation by high clinoenstatite', Science, vol. 269, no. 5227, pp. 1095-1098.
Sharp, Thomas ; Rubie, D. C. / Catalysis of the olivine to spinel transformation by high clinoenstatite. In: Science. 1995 ; Vol. 269, No. 5227. pp. 1095-1098.
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