Aluminium silicate xenocrystals in the ophites' of the subbetic zone (southern Spain)

In one of numerous basic intrusions in the Triassic Keuper facies of the Betic Cordilleras a picritic dolerite was found. Evidence of gravity accumulation processes could be observed in this outcrop showing rocks which commonly contain crystalline aggregates of corundum+green spinel+highly sericitized plagioclase. These are pseudomorphs after andalusite. The dolerite has a high content of incompatible elements. The observations suggest a continental setting of the magmatism i.e. metapelites belonging to basement rocks (not found in the outcrops) have been assimilated by the magma