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Temperature dependence of Pt and Rh solubilities in a haplobasaltic melt |
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| Authors: | SS Fortenfant DB Dingwell |
| Institution: | 1 Bayerisches Geoinstitut, University of Bayreuth, D-95440 Bayreuth, Germany 2 Laboratory for Inorganic Chemistry, Universitätsstr. 6, ETH Zürich, CH-8092 Zürich, Switzerland 3 Department of Earth and Environmental Sciences, Theresienstr. 41, University of Munich, D-80333 Munich, Germany |
| Abstract: | The temperature dependence of the solubilities of Pt and Rh in a haplobasaltic (anorthite-diopside 1-bar eutectic composition) melt has been investigated at 1 bar and 1300 to 1550°C using the mechanically assisted equilibration technique (Dingwell et al., 1994). The experiments were performed at almost constant oxygen fugacity (log fO2 = −2.5 ± 0.3) over the entire temperature range. Major element concentrations in the quenched glass samples were determined using an electron microprobe. Pt and Rh concentrations were obtained by laser ablation inductive coupled plasma mass spectrometry. From our data, we obtain the following expressions for the solubilities of pure Pt and pure Rh in anorthite-diopside eutectic melt at 1 bar and log fO2 = −2.5: |
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