JOURNAL OF VOLCANOLOGY AND SEISMOLOGY, cilt.6, ss.352-360, 2012 (SCI İndekslerine Giren Dergi)
This paper considers results from isotopegeochronological (K–Ar) studies of the products of
Neogene–Quaternary volcanism in the Karacada area, which is situated within the northern frontal part of the Arabian plate. It was found that magmatic activity has been evolving at this location for at least the last 11–10 Myr and was distinctly discrete in character. Three stages of volcanism have been identified: (I) Early or Miocene, ~11–6.7 Ma; (II) Middle or Pliocene–Early Quaternary, 4–1 Ma; and (III) Late or Late Quaternary, 0.4–0.1 Ma. The most recent manifestations of magmatic activity in the region date back to about 100000 years ago. An analysis of the spatial distribution of volcanic centers of different ages in the Karacada neovolcanic area shows that the magmatism of that region involved a lateral migration of activity from northwest to southeast along a major regional tectonic fault. The migration was caused by the movement of local tension zones where the lithosphere was thinner and deepseated mantle magmas were ascending.