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Transformation kinetics for olivine with ~75 ppm H_2O into ringwoodite

Du Frane, Wyatt L. and Sharp, Thomas G. and Mosenfelder, Jed L. and Leinenweber, Kurt (2010) Transformation kinetics for olivine with ~75 ppm H_2O into ringwoodite. Geochimica et Cosmochimica Acta, 74 (12). A250-A250. ISSN 0016-7037.

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The existence of metastable olivine (MO) has been debated as a possible trigger of deep focus earthquakes, but of equal importance its existence may constrain the amount of hydrogen being brought to Earth’s mantle transition zone (MTZ) via subduction. The rate which olivine (ol) transforms into wadsleyite and ringwoodite (rw) is dependent on hydrogen content, and determines the likelihood that metastable olivine could persist into the MTZ. Previous results indicate that 300 ppm of H_2O is too much to allow for MO [1,2]. How much is too much? We present rw rim growth rates for olivine containing as little as 75 ppm of H_2O.

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Additional Information:© 2010 Published by Elsevier Ltd.
Record Number:CaltechAUTHORS:20130326-134143745
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Official Citation:Goldschmidt Abstracts 2010 – D, Geochimica et Cosmochimica Acta, Volume 74, Issue 12, Supplement, June 2010, Pages A202-A256, ISSN 0016-7037, 10.1016/j.gca.2010.04.029.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:37630
Deposited By: Tony Diaz
Deposited On:26 Mar 2013 23:18
Last Modified:26 Mar 2013 23:18

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