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    Petrogenesis of the uckapl Granitoid and its Mafic Enclaves in Elmal Area (Nide, Central Anatolia, Turkey)
    (WILEY, 2013) Kurt, Huseyin; Kocak, Kerim; Asan, Kursad; Karakas, Mustafa
    The Late Cretaceous uckapl Granitoid including mafic microgranular enclaves intruded into metapelitic and metabasic rocks, and overlain unconformably by Neogene ignimbrites in the Nigde area of Turkey. It is mostly granite and minor granodiorite in composition, whereas its enclaves are dominantly gabbro with a few diorites in composition. The uckapl Granitoid is composed mainly of quartz, K-feldspar, plagioclase, biotite, muscovite and minor amphibole while its enclaves contain mostly plagioclase, amphibole, minor pyroxene and biotite. The uckapl Granitoid has calcalkaline and peraluminous (A/CNK= 1.0-1.3) geochemical characteristics. It is characterized by high LILE/HFSE and LREE/HREE ratios ((La/Lu)(N)= 3-33), and has negative Ba, Ta, Nb and Eu anomalies, resembling those of collision granitoids. The uckapl Granitoid has relatively high (SrSr(i))-Sr-87-Sr-86 ratios (0.711189-0.716061) and low epsilon Nd-(t) values (-5.13 to -7.13), confirming crustal melting. In contrast, the enclaves are tholeiitic and metaluminous, and slightly enriched in LILEs (K, Rb) and Th, and have negative Ta, Nb and Ti anomalies; propose that they were derived from a subduction-modified mantle source. Based on mineral and whole rock chemistry data, the uckapl granitoid is H-(hybrid) type, post-collision granitoid developed by mixing/mingling processes between crustal melts and mantle-derived mafic magmas.