Hi Simon (and all)
>Pseudosection by all means, but remember the
>essentials of the basic petrology.
This is obviously true (I'm not a fanatic of
pseudosections) and it is clear to all of us that
cpx-opx-pl = LP mafic granulite, probably
something like 800°C, 6 kbar.
You may spend a month calculating and come to
pretty much the same result... and ask whether it
was worth it... but the problem is that without
that effort (be it thermobarometry, PT grids,
pseudosections, or something else) you cannot
really argue. And perhaps sometimes it can lead
to some surprising discoveries...
Cheers,
Pavel
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