Fe-Ti-enriched mafic rocks from south Andaman ophiolite suite: Implicationof late stage liquid immiscibility

Andaman ophiolite suite (AOS) is amongst one of the ophiolite complexes of the world, which comprises complete dismembered ophiolitic sequence. It con sists of ultra-mafic and mafic cumulates, sheeted dykes, pillow lavas, fels ic rocks (mainly plagiogranites), and sedimentaries, including ribbon chert , In the present communication, a mafic rock that is highly enriched in FeO -TiO2 and encountered in the ophiolites of south Andaman is presented. Fe-T i-enriched mafic rock is not Set reported from the south AOS, Genetically t his rock may be associated with leucocratic rocks of AOS because it is expe rimentally proved that Fe-enriched basaltic melt and plagiogranite melt can be generated by late stage liquid immiscibility. Similar to most of the ot her plagiogranite occurrences of the world, Andaman plagiogranites are also supposed to be endproducts of magmatic differentiation of a mafic magma. B ut the discovery of Fe-Ti-enriched mafic rocks supports liquid immiscibilit y process.