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

   General:
     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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