Tata Sabaya has produced two-pyroxene andesite and porphyritic andesite. Minerals contained within the rock are augite, biotite, hornblende, hypersthene, plagioclase and titanomagnetite with only little variation between rocks erupted during separate stages of volcanic activity. The erupted volcanites define a potassium-rich calc-alkaline suite. Inclusions of more mafic rocks in the erupted material may indicate that mafic magma was injected into the magma chamber of Tata Sabaya. The magma genesis at Tata Sabaya has been explained with magma mixing processes, which gave rise to a fairly uniform composition of the eruption products.