Application of Computer Simulation of Magmatic Processes to the Teaching of Petrology

A series of computer programs called COMAGMAT-3.0 has been developed to simulate basaltic magma differentiation processes. The programs are designed for use by igneous penologists to show the chemical consequences of magma crystallization. This package is a powerful tool that can be used to help students better understand how pressure, oxygen fugacity, and initial melt composition effect the resultant liquid lines of descent for 10 major and 20 trace elements. The model calculates the mineral proportions and compositions of olivine, plagioclase, pyroxenes and iron-ore phases crystallizing at different pressure and redox conditions. The effect of each parameter (including mineral-melt distribution coefficients) can be investigated numerically and output to the screen or a printer. Moreover, new methods of igneous rock interpretation can be applied to magmatic systems based on the package. The COMAGMAT programs operate in a user-friendly environment with the built-in help, and graphics support makes it useful for both beginners and dabblers.