An experimental study of the partitioning of trace elements between rutile and silicate melt as a function of oxygen fugacity

Mallmann, Guilherme, Fonseca, Raul O. C. and Silva, Adolfo B. (2014) An experimental study of the partitioning of trace elements between rutile and silicate melt as a function of oxygen fugacity. Anais da Academia Brasileira de Ciencias, 86 4: 1609-1629. doi:10.1590/0001-3765201420140014

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Author Mallmann, Guilherme
Fonseca, Raul O. C.
Silva, Adolfo B.
Title An experimental study of the partitioning of trace elements between rutile and silicate melt as a function of oxygen fugacity
Journal name Anais da Academia Brasileira de Ciencias   Check publisher's open access policy
ISSN 1609-1629
1678-2690
Publication date 2014-12-01
Year available 2014
Sub-type Article (original research)
DOI 10.1590/0001-3765201420140014
Open Access Status DOI
Volume 86
Issue 4
Start page 1609
End page 1629
Total pages 21
Place of publication Rio de Janeiro, Brazil
Publisher Academia Brasileira de Ciencias
Collection year 2015
Language eng
Formatted abstract
Subduction zone or arc magmas are known to display a characteristic depletion of High Field Strength Elements (HFSE) relative to other similarly incompatible elements, which can be attributed to the presence of the accessory mineral rutile (TiO2) in the residual slab. Here we show that the partitioning behavior of vanadium between rutile and silicate melt varies from incompatible (~0.1) to compatible (~18) as a function of oxygen fugacity. We also confirm that the HFSE are compatible in rutile, with D(Ta) > D(Nb) >> (D(Hf) >/~ D(Zr), but that the level of compatibility is strongly dependent on melt composition, with partition coefficients increasing about one order of magnitude with increasing melt polymerization (or decreasing basicity). Our partitioning results also indicate that residual rutile may fractionate U from Th due to the contrasting (over 2 orders of magnitude) partitioning between these two elements. We confirm that, in addition to the HFSE, Cr, Cu, Zn and W are compatible in rutile at all oxygen fugacity conditions.
Keyword Arc Magmas
High Field Strength Elements
Partition coefficient
Redox
Rutile
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Publications
Official 2015 Collection
 
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Created: Wed, 21 Jan 2015, 10:33:28 EST by Guil Mallmann on behalf of School of Earth Sciences