The paragonite-muscovite solvus: I. P-T-X limits derived from the Na-K compositions of natural, quasibinary paragonite-muscovite pairs

Data on the Na-K compositions and final equilibration temperatures of natural, quasibinary paragonite-muscovite (Pg-Ms) pairs (mole fraction of margarite in Pg < 0.05; Si/formula unit ≤ 6.2 and/or Σ(Mg + Fe 2+ + Fe 3+) ≤ 0.35 for Ms) have been plotted and analyzed to determine the P- T - X limits...

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