Textural evidence for liquid immiscibility in Tarbtie South Ring Complex.

the subvolcanic nordmarkites of Tarbtie South complex, Eastern Desert, Egypt. contain randomly distributed rounded to surrounded ocelli. they consist of alkali feldspar syenite and alkali feldspar quartz syenite embadded in an alkaline granitic matrix. data of geochemistry and texture consistent with the hypothesis of liquid immiscibility.