Abstract
This chapter includes phase relations in Na- and Ca-bearing systems ranging from simple binaries, such as CaTs–Jd, to more complex compositions in the systems Na2O–CaO–Al2O3–SiO2 (NCAS) and Na2O–CaO–MgO–Al2O3–SiO2 (NCMAS). These phase relations are important for describing in a greater detail the transformation from granulite to eclogite, and contain a number of petrologically important phases including three solid solutions: garnet, pyroxene and plagioclase. The composition of garnet is not affected by the presence of Na, because the solubility of Na in garnet is negligible at the lithospheric pressures.
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Gasparik, T. (2014). Systems with Na and Ca at Lithospheric Pressures. In: Phase Diagrams for Geoscientists. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-5776-3_7
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DOI: https://doi.org/10.1007/978-1-4614-5776-3_7
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