cpxwing log entry 001

Mushrooms and clinopyroxene –
a good combination?

This is Simon’s blog reporting on the development of a new single-clinopyroxene HPx-EOS.

The new model is designed to replace pre-existing versions that do not currently overlap in P—T—x space.

So far three clinopyroxene EOS exist. Ordered diopside—omphacite—jadeite (Green et al., 2007) is for coexisting sodic—calcic clinopyroxenes. It accounts for order—disorder on the octahedral M1 and M2 sites, but not on the tetrahedral T sites. It is appropriate for high pressure but unsuitable for high temperatures.

Continue reading “cpxwing log entry 001”

Modelling experiments at ANU

Eleanor has been at the Australian National University in Canberra visiting Corinne Frigo. Corinne has recently begun a complex program of experiments on the generation of basalt-analogue melts in the CMAS±Cr system. The new igneous set of HPx-eos do not agree too well with Corinne’s initial experiments. This is not really a surprise at this stage, but we have some work to do before we can understand what is wrong.

Corinne is working with Hugh O’Neill, Richard Arculus and Eleanor on ARC Discovery Project DP170100982, A new perspective on melting in the Earth and the origin of basalts. In this project we have the opportunity for close interaction between the experimental program and the internally-consistent modelling work. Enlightening and fun! Corinne will present some of this work at Goldschmidt on 21st August.

Sunset in Australia’s Bush Capital.

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