EXSOLUTION IN FERROMAGNESIAN OLIVINE OF THE DIVNOE METEORITE

Ferromagnesian olivine, one of the most common minerals in the solar s ystem, has been widely regarded as a continuous solid solution, althou gh several thermodynamic analyses have suggested the possibility of a miscibility gap at low temperatures. Natural ferromagnesian olivine fr om the Divnoe meteorite contains compositionally different exsolution lamellae, providing direct evidence far the existence of a miscibility gap in iron-magnesium olivine solid solutions.