COMAGMAT: a Fortran program to model MAGMA differentiation processes

摘要: Abstract The purpose of this paper is to present a general model (COMAGMAT) for the calculation equilibrium temperatures and phase relations at given extent crystallization or melting in natural magmatic systems. This based on set empirical expressions that describe mineral-melt equilibria major trace elements terms pressure (up 12 kbar), temperature, liquid compositions systems ranging from primitive basalts dacites. These are form empirically calibrated geothermometers Olivine, Augite, Pigeonite (Opx), Plagioclase, Ilmenite, Magnetite used develop algorithm simulating multiply saturated melts. results program calculated lines descent, plus mineral proportions compositions. calculations core allows user simulate processes simple isobaric situ differentiation resulted crystal settling, polybaric fractionation.