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Melt Mixing and Crystallisation in the Plumbing System of the 1783 Laki Eruption
| Content Provider | Semantic Scholar |
|---|---|
| Author | Robinet, Lucas Hall, C. Eremin Blundy, J. Arce, J. L. Harley, Simon L. Hinton, Richard W. Gilmour, Justin Busfield Crowther, Sean Wickens, Hayley |
| Copyright Year | 2019 |
| Abstract | Mineral/melt partition coefficients for a suite of trace elements were obtained in a one-day (July 27, 2005) project using the Cameca ims-4f ion probe. The purpose of this short study was to measure a suite of trace elements in experimental run products containing Mgperovskite, Majorite-garnet, and melt [1]. The goal was to compare results for trace elements measured on a different SIMS instrument, as well as to fill in gaps for trace elements not previously analysed. Of special importance was analysis of Sc, which was not measured previously, and Ce for which previous measurements were suspect, in order to more fully develop lattice strain based partitioning models for trivalent cations. The probe session was entirely successful in obtaining the desired data. For those elements of overlap with previous measurements, reproducibility was excellent. Lattice strain models are dependent on the fitting procedure. Best fit results indicate similar mineral/melt partitioning behaviour of trivalent cations for perovskite and majorite, with Young’s modulii of ~ 400 GPa. Data are used to constrain models for differentiation of an Hadean magma ocean. Results Experiment 249 of [1] was selected for analysis because of the large melt pool and large crystals (~ 50 m) available for analysis. The ion beam spot size was approximately 20 m in diameter. We analyzed five spots on the melt phase, two majorite grains, and seven perovskite grains over the course of the one-day project. Results are given in Table 1. Table 1. Mineral/melt partition coefficients Pv/mt new previous maj/mt new previous |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.ed.ac.uk/files/atoms/files/report2006b.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |