Anortite chemical potential,a factor for chromatic concentrations in ultramafic-mafic sets

Category Petrology
Group GSI.IR
Location 20th symposium on geosciences
Holding Date 16 April 2008

     In recent years variOus hypothesis concerning the origin of chromitite concentration have been presented among which two hypothesis are universally most favorably accepted ; These two hypothsis are : (1) Magma mixing (2) Interaction of melt - solid
mantle peridotite
In none of these hypothesis the structural evolution of mixed magmas or invading magmas which result in the appearance of an
immiscible chromite melt or solid chromite , has been treated Field, laboratory and geochemical investigation have shown that if a magma rich in anorthite structural complex “is mixed with a magma rich in “ olivine structural complex “ spinel structural complex “is formed by following reaction

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