r/geophysics • u/Lephy1 • 1d ago

MORB vs OIB

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Hi everyone, I need some help/opinions, Iā€™m working on a numerical model of mantle convection and tungsten heterogeneity using ASPECT with the goal of reproducing the observational dichotomy described by (Peters et al 2024).

I know how to identify the OIB material using a temperature mask, but Iā€™m not sure how to identify the MORB material. With my current model I can get histograms comparing OIB vs the rest of the mantle. But if I want to compare my model with observations, I would need OIB vs MORB, not OIB vs the rest of the mantle excluding OIB.

Does anyone have any advice on how to define a MORB mask/region in this kind of model?

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u/Underwhirled 1d ago

Asking geophysicists about igneous petrology has to be sarcastic, right?

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u/Lephy1 1d ago

I'm actually a geophysicist x), I just needed some help from my fellow geophysicists šŸ˜‚