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Our workshop program provides training and teaching in topics across geochemistry and related fields. We are currently liaising with the workshop organisers to ascertain if any workshops can become virtual. Any updates will be added to this page.
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The Role of Pyroxenites in the Volatile Budgets of Intraplate Magmas
Gibson S, Crosby J, Gleeson M & Jackson C
Gibson S, Crosby J, Gleeson M & Jackson C (2020) Goldschmidt Abstracts, 2020 824
The author has not provided any additional details.
03d: Room 1, View in program
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That was a really interesting presentation. I heard a brief mention of H2O/F fractionation but could you expand on this please? Just fyi, my current interest is in F-rich granites and their basaltic source regions rather then mantle geochemistry. Thank you once again. MN
Hi Marc, thanks for your perceptive question. In all of the mantle olivines and pyroxenes that we've now studied we see a decoupling of F and H2O. For clinopyroxenes this seems to reflect a different: (i) coupling behaviour in the crystal lattice (F with Ti, Fe3+, Cr3+ and H2O with Al) and (ii) partitioning behaviour of F and H during sub-solidus re-equilibration of opx and cpx. Some of this is explained in our recent GCA paper https://www.sciencedirect.com/science/article/abs/pii/S0016703720301289.
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