Petrogenesis of the ü?kap?l? Granitoid and its Mafic Enclaves in Elmal? Area (Ni?de, Central Anatolia, Turkey) |
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引用本文: | Hüseyin KURT,Kerim KO?AK,Kür?ad ASAN and Mustafa KARAKA?.Petrogenesis of the ü?kap?l? Granitoid and its Mafic Enclaves in Elmal? Area (Ni?de, Central Anatolia, Turkey)[J].Acta Geologica Sinica,2013,87(3):738-748. |
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作者姓名: | Hüseyin KURT Kerim KO?AK Kür?ad ASAN and Mustafa KARAKA? |
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作者单位: | 1 Ministry of Education, Key Laboratory of Western China’s Mineral Resources and Geological Engineering, School of Earth Science and Resources, Chang’an University, Xi’an 710054, Shaanxi, China
2 Number 7 Geological Brigade, Xinjiang Bureau of Geology and Mineral Resource Exploration, Wusu 833000, Xinjiang, China |
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基金项目: | financially supported by the Seluk University Scientific Research Projects Coordination (Project No: 2004/37) |
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摘 要: | The Late Cretaceous ükapili Granitoid including mafic microgranular enclaves intruded into metapelitic and metabasic rocks, and overlain unconformably by Neogene ignimbrites in the Ni de 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 ükapili 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 ükapili 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 ükapili Granitoid has relatively high 87Sr/86Sr (i) ratios (0.711189-0.716061) and low εNd (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 ükapili granitoid is H-(hybrid) type, post-collision granitoid developed by mixing/mingling processes between crustal melts and mantle-derived mafic magmas.
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关 键 词: | H-type granitoid mafic enclave geochemistry Central Anatolia Turkey |
收稿时间: | 2011/11/12 0:00:00 |
修稿时间: | 2012/7/10 0:00:00 |
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