An experimental study of the partitioning of trace elements between rutile and silicate melt as a function of oxygen fugacity
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 partition...
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| Format: | Article |
| Language: | English |
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Academia Brasileira de Ciências
2014-12-01
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| Series: | Anais da Academia Brasileira de Ciências |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000401609&lng=en&tlng=en |
| _version_ | 1818443547613855744 |
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| author | GUILHERME MALLMANN RAÚL O.C. FONSECA ADOLFO B. SILVA |
| author_facet | GUILHERME MALLMANN RAÚL O.C. FONSECA ADOLFO B. SILVA |
| author_sort | GUILHERME MALLMANN |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-14T19:01:47Z |
| format | Article |
| id | doaj.art-8b30a1289e744490946726749df147d6 |
| institution | Directory Open Access Journal |
| issn | 1678-2690 |
| language | English |
| last_indexed | 2024-12-14T19:01:47Z |
| publishDate | 2014-12-01 |
| publisher | Academia Brasileira de Ciências |
| record_format | Article |
| series | Anais da Academia Brasileira de Ciências |
| spelling | doaj.art-8b30a1289e744490946726749df147d62022-12-21T22:50:56ZengAcademia Brasileira de CiênciasAnais da Academia Brasileira de Ciências1678-26902014-12-018641609162910.1590/0001-3765201420140014S0001-37652014000401609An experimental study of the partitioning of trace elements between rutile and silicate melt as a function of oxygen fugacityGUILHERME MALLMANNRAÚL O.C. FONSECAADOLFO B. SILVASubduction 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.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000401609&lng=en&tlng=enmagmas de arcoelementos de elevado potencial de ionizaçãocoeficientes de partiçãoredoxrutilo |
| spellingShingle | GUILHERME MALLMANN RAÚL O.C. FONSECA ADOLFO B. SILVA 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 Ciências magmas de arco elementos de elevado potencial de ionização coeficientes de partição redox rutilo |
| title | An experimental study of the partitioning of trace elements between rutile and silicate melt as a function of oxygen fugacity |
| title_full | An experimental study of the partitioning of trace elements between rutile and silicate melt as a function of oxygen fugacity |
| title_fullStr | An experimental study of the partitioning of trace elements between rutile and silicate melt as a function of oxygen fugacity |
| title_full_unstemmed | An experimental study of the partitioning of trace elements between rutile and silicate melt as a function of oxygen fugacity |
| title_short | An experimental study of the partitioning of trace elements between rutile and silicate melt as a function of oxygen fugacity |
| title_sort | experimental study of the partitioning of trace elements between rutile and silicate melt as a function of oxygen fugacity |
| topic | magmas de arco elementos de elevado potencial de ionização coeficientes de partição redox rutilo |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000401609&lng=en&tlng=en |
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