Abstract Details
(2020) The Role of Pyroxenites in the Volatile Budgets of Intraplate Magmas
Gibson S, Crosby J, Gleeson M & Jackson C
https://doi.org/10.46427/gold2020.824
The author has not provided any additional details.
03d: Room 1, Wednesday 24th June 22:15 - 22:18
Sally Gibson
View abstracts at 2 conferences in series
James Crosby View abstracts at 3 conferences in series
Matthew Gleeson View abstracts at 3 conferences in series
Charlotte Jackson View abstracts at 4 conferences in series
James Crosby View abstracts at 3 conferences in series
Matthew Gleeson View abstracts at 3 conferences in series
Charlotte Jackson View abstracts at 4 conferences in series
Listed below are questions that have been submitted by the community that the author will try and cover in their presentation. To submit a question, ensure you are signed in to the website. Authors or session conveners approve questions before they are displayed here.
Submitted by Marc Norman on Tuesday 23rd June 06:22
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
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
Submitted by Sally A. Gibson on Tuesday 23rd June 16:07
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.
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.
Sign in to ask a question.