Rheology and the Fe3+-chlorine reaction in basaltic melts

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dc.contributor.author Webb, Sharon L.
dc.contributor.author Murton, Bramley J.
dc.contributor.author Wheeler, Andrew J.
dc.date.accessioned 2016-04-20T14:57:33Z
dc.date.available 2016-04-20T14:57:33Z
dc.date.issued 2014-02
dc.identifier.citation WEBB, S. L., MURTON, B. J. & WHEELER, A. J. 2014. Rheology and the Fe3 +–chlorine reaction in basaltic melts. Chemical Geology, 366, 24-31. doi:10.1016/j.chemgeo.2013.12.006 en
dc.identifier.volume 366 en
dc.identifier.startpage 24 en
dc.identifier.endpage 31 en
dc.identifier.issn 0009-2541
dc.identifier.uri http://hdl.handle.net/10468/2469
dc.identifier.doi 10.1016/j.chemgeo.2013.12.006
dc.description.abstract The viscosity of mid-ocean ridge basalt (MORB) as a function of halogen content was determined in the high viscosity range (109-1012 Pa s) using the micropenetration technique. In this study we show that, in the presence of iron, the addition of chlorine reduces the viscosity of a metaluminous melt (basalt); and that the addition of chlorine increases the viscosity of the analog iron-free haplo-basalt. Previous studies of the effects of chlorine and fluorine on the viscosity of peralkaline and metaluminous melts has shown that while fluorine decreases the viscosity of such melts, chlorine acts to increase their viscosity. The major effect of the addition of chlorine to the present basalt melt is the conversion of a network-forming Fe3+ to a network-modifying Fe2+ for each added Cl- ion, resulting in an increase in Fe2+/Fetot from 0.126 to 0.432 upon the addition of 1.41 mol% Cl2O-1, in air at a constant log10 ƒO2 of -0.7. It would appear that it is this increase in Fe2+ induced by the addition of chlorine, rather than the structural position of the chlorine atom in the melt which causes the reduction in viscosity. Of greater importance is that such an increase in Fe2+ would, in general, be interpreted as a 3 order of magnitude decrease in ƒO2, instead of the addition of chlorine. en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Elsevier B.V. en
dc.rights Copyright © 2014 Elsevier B.V. All rights reserved. en
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/ en
dc.subject Chlorine en
dc.subject Viscosity en
dc.subject Redox en
dc.subject Iron en
dc.subject Silicate melts en
dc.subject Configurational entropy en
dc.subject Aluminosilicate melts en
dc.subject Andesitic melts en
dc.subject Viscosity en
dc.subject Temperature en
dc.subject Glasses en
dc.subject Island en
dc.subject Dependence en
dc.subject Mid Atlantic ridge en
dc.title Rheology and the Fe3+-chlorine reaction in basaltic melts en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Andrew Wheeler, Biological, Earth & Environmental Sciences, University College Cork, Cork, Ireland. +353-21-490-3000 Email: a.wheeler@ucc.ie en
dc.internal.availability Full text available en
dc.date.updated 2014-10-23T16:10:54Z
dc.description.version Accepted Version en
dc.internal.rssid 271354999
dc.internal.wokid 000331565300003
dc.description.status Peer reviewed en
dc.identifier.journaltitle Chemical Geology en
dc.internal.copyrightchecked No. !!CORA!! AV permitted after 24 month embargo period, as referenced on Sherpa RoMEO http://www.sherpa.ac.uk/romeo/search.php and on the publisher's website: https://www.elsevier.com/about/company-information/policies/sharing#acceptedmanuscript en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress a.wheeler@ucc.ie en

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