The ancestor to the MCS was the EC-RAFC model. The link below allows downloading of the EC-RAFC code. EC-RAFC has now been largely superseded by the MCS. However, for many years it was a popular modeling tool and it provided the essential conceptual backbone to the MCS. Although the EC code has been superseded, much of the geologic discussion and conceptual framework remains valid today nearly a quarter of a century after its conception. The literature references for the EC-RAFC suite of models include:

F.J. Spera, Bohrson, W. A., Till, C.B., Ghiorso, M.S., (2007), Partitioning of trace elements among coexisting crystals, melt, and supercritial fluid during isobaric crystallization and melting American Mineralogist, Vol 92, pages 1881-1898 .

Bohrson, W. A., and F. J. Spera (2007), Energy-Constrained echarge, Assimilation, and Fractional Crystallization (EC-RA/É'/FC): A Visual Basic computer code for calculating trace element and isotope variations of open-system magmatic systems, Geochem. Geophys. Geosyst., 8, Q11003, doi:10.1029/2007GC001781 (PDF file).

Bohrson, W. A., and F. J. Spera (2007), Energy-Constrained echarge, Assimilation, and Fractional Crystallization (EC-RA/É'/FC): A Visual Basic computer code for calculating trace element and isotope variations of open-system magmatic systems, Geochem. Geophys. Geosyst., 8, Q11003, doi:10.1029/2007GC001781 (XLS file).

Spera, F.J., and Bohrson,W. (2004) Open-System Magma Chamber Evolution: an Energy-constrained Geochemical Model Incorporating the Effects of Concurrent Eruption, Recharge, Variable Assimilation and Fractional Crystallization . Journal of Petrology, vol.45, no.12, pp.2459-2480, 

Spera, F. J., and W. A. Bohrson (2002) Energy-constrained open-system magmatic processes 3. Energy-Constrained Recharge, Assimilation, and Fractional Crystallization (EC-RAFC), Geochem. Geophys. Geosyst., 3(12), 8001, doi:10.1029/2002GC000315.

Bohrson, W. A., Spera, F. J. (2001) Energy-Constrained Open-System Magmatic Processes II: Application of Energy-Constrained Assimilation-Fractional Crystallization (EC-AFC) Model to Magmatic Systems. Journal of Petrology, v. 42, p. 1019-1041.

Spera, F. J., Bohrson, W. A. (2001) Energy-Constrained Open-System Magmatic Processes I: General Model and Energy-Constrained Assimilation and Fractional Crystallization (EC-AFC) Formulation. Journal of Petrology, v. 42, p. 999-1018.

The toy model is a a VBL code given in Excel that allows one to engage in open system calculations for any binary eutectic system. The literature reference  for the Toy model is:

Spera, Frank J., Schmidt, J. S., Bohrson, W. A. and Brown G. A., 2016. Dynamics and thermodynamics of magma mixing: Insights from a simple exploratory model. American Mineralogist, Vol. 97, p.1155-1164.

EC-RAFC

EC-RAFC Download

Toy model

Toy model Download