Effects of water on the α-β transformation kinetics in San Carlos Olivine

Tomoaki Kubo, Eiji Otani, Takumi Kato, Toru Shinmei, Kiyoshi Fujino

Research output: Contribution to journalArticlepeer-review

99 Citations (Scopus)

Abstract

In experiment at 13.5 gigapascals and 1030°C, the growth rate of wadsleyite, which forms from transformation of olivine, was substantially enhanced by the presence of water. Wadsleyite had a low dislocation density and subgrain boundaries in wet runs. Water enhanced the dislocation recovery in wadsleyite and therefore caused inelastic relaxation of the localized pressure drop associated with the transformation, resulting in an increase of the growth rate in wet runs. These results imply that even a small amount of water of 0.05 weight percent can weaken wadsleyite in the mantle.

Original languageEnglish
Pages (from-to)85-87
Number of pages3
JournalScience
Volume281
Issue number5373
DOIs
Publication statusPublished - 1998 Jul 3

ASJC Scopus subject areas

  • General

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