Foreland Magmatism during the Arabia^Eurasia Collision: Pliocene^QuaternaryActivity of the KaracadagVolcanic Complex, SW Turkey

Pliocene to Quaternary magmatism in the Karacadag Volcanic Complex in SE Turkey occurred in the foreland region of the Arabia^Eurasia collision and can be divided into two phases.The earlier Karacadag phase formed a north^south-trending volcanic ridge that erupted three groups of lavas.The same range of mantle sources contributed to the younger Ovabag phase lavas, which were erupted from monogenetic cones to the east of the Karacadag fissure. As at several other intraplate localities across the northern Arabian Plate this magmatism represents mixtures of melt from shallow, iso-topically enriched mantle and from deeper, more depleted mantle. The deep source is similar to the depleted mantle invoked for other northern Arabian intraplate volcanic fields but at Karacadag this source contained phlogopite.This source could be located in the shal-low convecting mantle or may represent a metasomatic layer in the base of the lithosphere.There is no evidence for a contribution fro