Trace element partitioning on the Tinaquillo Lherzolite solidus at 1.5GPa

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• 作者：McDade ; Paula ; Blundy ; Jon D. ; Wood ; Bernard J.
• 关键词：Partition coefficients ; Mantle melting ; Experimental petrology ; Trace elements ; Melt inclusions
• 刊名：Physics of the Earth and Planetary Interiors
• 出版年：2003
• 期刊代码：73_00319201
• 类别：ear
• 出版时间：September 30, 2003
• 卷：139
• 期：1-2
• 页码：129-147
• 文件大小：507 K

摘要

The partition coefficient (D) for any trace element in the mantle is a function of pressure, temperature and phase composition, the latter of which is controlled by the relative fertility of the peridotite. Models of mantle melting therefore require accurate determination of partition coefficients along the peridotite solidus. We have experimentally determined partition coefficients for clinopyroxene, orthopyroxene and olivine in equilibrium with melt, close to the anhydrous solidus of refractory Tinaquillo Lherzolite at 1.5GPa, 1315°C. All trace elements, apart from Sc, are incompatible in clinopyroxene, and the maximum D_REE is D_Er at 0.76. All trace elements are incompatible in orthopyroxene; the most compatible REE is Lu (D_Lu