Widespread phosphorous excess in olivine, rapid crystal growth, and implications for magma dynamics

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dc.citation.firstpage433en_US
dc.citation.issueNumber2en_US
dc.citation.journalTitleVolcanicaen_US
dc.citation.lastpage450en_US
dc.citation.volumeNumber5en_US
dc.contributor.authorLee, Cin-Tyen_US
dc.contributor.authorSun, Chenguangen_US
dc.contributor.authorSharton-Bierig, Eytanen_US
dc.contributor.authorPhelps, Patricken_US
dc.contributor.authorBorchardt, Jacksonen_US
dc.contributor.authorLiu, Bodaen_US
dc.contributor.authorCostin, Geluen_US
dc.contributor.authorJohnston, A. Danaen_US
dc.date.accessioned2023-03-23T14:10:33Zen_US
dc.date.available2023-03-23T14:10:33Zen_US
dc.date.issued2022en_US
dc.description.abstractTrace element zoning is often used to unravel the crystallization history of phenocrysts in magmatic systems, but interpretation requires quantifying the relative importance of equilibrium versus disequilibrium. Published partition coefficients for phosphorous (P) in olivine vary by more than a factor of ten. After considering kinetic effects, a new equilibrium partition coefficient was extrapolated from a re-examination of natural and experimental systems, indicating that P partition coefficients in olivine are significantly over-estimated. These new partitioning constraints allow us to establish a theoretical P Equilibrium Fractionation Array (PEFA) for mid-ocean ridge basalts (MORBs), revealing that most olivines from MORBs have excess P (2–15 times PEFA) and are thus in disequilibrium. Using an independent case study of natural dendritic olivines, we show that such P enrichments can be explained by diffusion-limited incorporation of P during rapid crystal growth. If growth rate can be related to cooling, the rapid growth rates of olivines have implications for magma system dynamics, such as the size of magma bodies or where crystallization occurs within the body.en_US
dc.identifier.citationLee, Cin-Ty, Sun, Chenguang, Sharton-Bierig, Eytan, et al.. "Widespread phosphorous excess in olivine, rapid crystal growth, and implications for magma dynamics." <i>Volcanica,</i> 5, no. 2 (2022) Presses universitaires de Strasbourg: 433-450. https://doi.org/10.30909/vol.05.02.433450.en_US
dc.identifier.digitalLee-et-al_2022_Volcanicaen_US
dc.identifier.doihttps://doi.org/10.30909/vol.05.02.433450en_US
dc.identifier.urihttps://hdl.handle.net/1911/114524en_US
dc.language.isoengen_US
dc.publisherPresses universitaires de Strasbourgen_US
dc.rightsThis work is licensed under a Creative Commons Attribution 4.0 International License.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titleWidespread phosphorous excess in olivine, rapid crystal growth, and implications for magma dynamicsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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