Modelling equilibrium and fractional crystallization in the system MgO-FeO-CaO-Al2O3-SiO2

Details Modelling equilibrium and fractional crystallization in the system MgO-FeO-CaO-Al2O3-SiO2 Modelling equilibrium and fractional crystallization in the system MgO-FeO-CaO-Al2O3-SiO2

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985pggp.rept..220h&link_type=abstract

In NASA, Washington Repts. of Planetary Geol. and Geophys. Program, 1984 p 220-222 (SEE N85-23474 13-91)

Statistics

Computation

Crystallization, Equilibrium Methods, Lunar Core, Lunar Evolution, Magma, Petrology, Planetary Geology, Geochemistry, Mathematical Models, Phase Diagrams, Phase Transformations, Solidification

Scientific paper

A mathematical modelling technique for use in petrogenesis calculations in the system MgO-FeO-CaO-Al2O3-SiO2 is reported. Semiempirical phase boundary and elemental distribution information was combined with mass balance to compute approximate equilibrium crystallization paths for arbitrary system compositions. The calculation is applicable to a range of system compositions and fractionation calculations are possible. The goal of the calculation is the computation of the composition and quantity of each phase present as a function of the degree of solidification. The degree of solidification is parameterized by the heat released by the solidifying phases. The mathematical requirement for the solution of this problem is: (1) An equation constraining the composition of the magma for each solid phase in equilibrium with the liquidus phase, and (2) an equation for each solid phase and each component giving the distribution of that element between that phase and the magma.

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