An experimental study of the partitioning of trace elements between rutile and silicate melt as a function of oxygen fugacity
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| Format: | Artículo científico |
| Language: | en |
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Academia Brasileira de Ciências
2014
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| author | GUILHERME MALLMANN |
| author_facet | GUILHERME MALLMANN |
| contents | An experimental study of the partitioning of trace elements between rutile and silicate melt as a function of oxygen fugacity GUILHERME MALLMANN RAÚL O. C. FONSECA ADOLFO B. SILVA Multidisciplinaria (Ciencias Naturales y Exactas) HFSE redox rutile Arc magma partition coefficient 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. 2014 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32732907006 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.4 Vol.86 |
| format | Artículo científico |
| id | redalyc_32732907006 |
| institution | Redalyc |
| language | en |
| publishDate | 2014 |
| publisher | Academia Brasileira de Ciências |
| spellingShingle | An experimental study of the partitioning of trace elements between rutile and silicate melt as a function of oxygen fugacity GUILHERME MALLMANN Multidisciplinaria (Ciencias Naturales y Exactas) HFSE redox rutile Arc magma partition coefficient An experimental study of the partitioning of trace elements between rutile and silicate melt as a function of oxygen fugacity GUILHERME MALLMANN RAÚL O. C. FONSECA ADOLFO B. SILVA Multidisciplinaria (Ciencias Naturales y Exactas) HFSE redox rutile Arc magma partition coefficient 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. 2014 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32732907006 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.4 Vol.86 |
| title | An experimental study of the partitioning of trace elements between rutile and silicate melt as a function of oxygen fugacity |
| topic | Multidisciplinaria (Ciencias Naturales y Exactas) HFSE redox rutile Arc magma partition coefficient |
| url | https://www.redalyc.org/articulo.oa?id=32732907006 |