and nature of carbonatite emplacement in North Pakistan By M. J. LE BAS, I. MIAN, Leicester and D. C....ein Deformationsalter von 24 + 2 Ma ergibt. Die Koga Karbonatite aus dem Ambela Komplex kommen dagegen...ein Alter yon 20 Ma angenommen. Abstract The N Pakistan carbonatites of Loe Shilman, Silai Patti and those...considered as comprising one alkaline igneous province associated with a Peshawar rift valley. N e w...localities. The Koga carbonatite in the Ambela complex occurs as a plug associated with nepheline syenites and