File:Geochemical Spider Diagrams.jpg
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English: Geochemical spider diagrams. Multi element plots showing partial melting models of a greywacke source, similar in composition to the Gramscatho Formation, to produce A — G1 two mica granite and B — G3 biotite granite. The least evolved G1 and G3 granites were selected for modelling. For G1 granite, 20% partial melting is sufficient to attain the abundances of the majority of the metals observed, with the exception of Li, Nb, Sn and Sb. For G3 granites, 30% partial melting of a muscovite-depleted source, consistent with higher T melting, is sufficient to attain the observed concentrations, with the exception of Li and Sn. For both, the observed Li abundances could be attained with a higher source Li abundance and the compatibility of Sn is likely overestimated using the mineral/melt ratios from this study. Niobium partitioning is likely also controlled by Fe-Ti oxides and residual biotite during melting. From: Simons, B.; Andersen, J. C.Ø.; Shail, R.K.; Jenner, F.E. (2017) "Fractionation of Li, Be, Ga, Nb, Ta, In, Sn, Sb, W and Bi in the peraluminous Early Permian Variscan granites of the Cornubian Batholith: Precursor processes to magmatic-hydrothermal mineralisation", Lithos, Volumes 278–281, Pages 491–512, Figure 9. https://doi.org/10.1016/j.lithos.2017.02.007 |
Date | |
Source | https://www.sciencedirect.com/science/article/pii/S0024493717300506 |
Author | Beth Simons, Jens C.Ø. Andersen, Robin K. Shail, Frances E. Jenner |
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