Petrology, Geochemistry and Mineral Chemistry of Extrusive Alkalic Rocks of the Southern Caspian Sea Ophiolite, Northern Alborz, Iran: Evidence of Alkaline Magmatism in Southern Eurasia

摘要

The alkalic basalts of the SCO ophiolite are made up of olivine, clinopyroxene (salite), plagioclase and Fe-Ti oxides. They show a narrow range of SiO₂ (45.2-48.85 wt. %) and MgO (3.59-4.85 wt. %) and are relatively enriched in TiO₂