Reply to the comment by Demény, A., Casillas, R. and Ahijado, A., on the paper of de Ignacio, C., Muñoz, M., Sagredo, J., Fernández-Santín, S., and Johansson, Å., 2006. Isotope geochemistry and FOZO mantle component of the alkaline–carbonatitic association of Fuerteventura, Canary Islands, Spain. Chem Geol. 232, 99–113