Polybaric melting
In
In practice, petrologic models employ advanced forms of the polybaric concept for greater physical plausibility.[3] Such models incorporate interconnected porosity to facilitate buoyant flow of liquids from lherzolitic or harzburgitic assemblages,[2] such as replacive dunite formation in migration channels. The porosity has to consist of at least two or a continuum of size scales to account for U-series disequilibria and major/trace element chemistry of abyssal peridotites.[4][5]
The realization that polybaric near-fractional melting may be the dominant form of basalt petrogenesis was a consequence of difficulties with a simpler
It is possible to incorporate polybaric near-fractional melting considerations into predictive algorithms such as pMELTS and MAGPOX.[6][7]
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