Ilbeyli, NurdanePearce, Julian A.Meighan, Ian G.Fallick, Anthony E.2024-09-182024-09-1820091300-0985https://doi.org/10.3906/yer-0811-8https://hdl.handle.net/20.500.12483/10731A wide variety of rock types were produced by the latest Cretaceous magmatism in the Central Anatolian Crystalline Complex. These rocks can be divided into three distinct units: (i) calc-alkaline, (ii) subalkaline/transitional, and (iii) alkaline. The calc-alkaline rocks are mainly metaluminous (I-type) ranging from monzodiorite to granite. The subalkaline/ transitional rocks are also metaluminous (I-type) ranging from monzonite to granite. The alkaline rocks are mainly peralkaline (A-type), ranging from feldspathoid-bearing monzosyenite to granite. Whole-rock oxygen isotope data from the complex have a considerable range of delta O-18 values between 6.5% and 14.8%. Initial Sr-87/Sr-86 versus Nd-143/Nd-144 ratios, and both ratios versus d18O values diagrams show that the intrusive rocks are derived from a subduction-modified mantle and also have experienced fractional crystallisation coupled with crustal assimilation. Delamination of a thermal boundary layer, and/or slab breakoff is the likely mechanisms for the initiation of the diverse magmatism in the complex.eninfo:eu-repo/semantics/openAccessI-type graniteA-type graniteoxygen isotopeKaman-Kirsehir regioncentral AnatoliaTurkeyArticle18452954710.3906/yer-0811-82-s2.0-70849085552Q2WOS:000272358100003Q2