EQUIL: a program for the modeling of low-pressure differentiation processes in natural mafic magma bodies

摘要: Abstract The use of a two-lattice model for the activity silicate melt components permits temperature dependent, compositionally independent distribution coefficients to be derived. compositional independence these functions allows constructed phase equilibria applicable wide range natural mafic systems. Using as base, program EQUIL was constructed. Given an initial primitive parental composition, enables one most low-pressure differentiation processes involving fractionation. These include magma chamber recharge, fractional or crystallization, assimilation and tapping chamber. Lines descent can calculated body undergoing single process, several together (i.e. paired crystallization).