Petrographic features of Late Cretaceous biotite granites in the Kurtoğlu region (Elazığ/Turkey)
Abstract views: 0 / PDF downloads: 0
Keywords:Late Cretaceous, Biotite Granite, Petrography, Kurtoğlu, Elazığ
The study area is located in a local area around Kurtoğlu village of Elazığ province, located within the Southeast Anatolian Orogenic Belt. The studied biotite granites belong to the Elazig Magmatic Complex. The Elazığ Magmatic Complex is grouped into volcanic, sub-volcanic and plutonic rocks and mafic and felsic. Felsic rocks belonging to the Elazığ Magmatic Complex are represented by granite, granodiorite, tonalite, quartz monzonite, monzodiorite, and mafic rocks are represented by diorite, quartz diorite and gabbros. The biotite granites are porphyric biotite minerals with an average size of one cm. Petrographically, they are composed of K-feldspar, plagioclase, quartz, biotite and opaque minerals. K-feldspars have low birefringence colours, grey tones, and earthy colours in single nicol. Plagioclases; anhedral, euhedral and mostly subhedral crystals. They typically indicate albite, albite+karlsbad and polysynthetic twinning. In some samples, sericitization and carbonation are observed mostly in the middle parts of the plagioclase resulting from alteration. Biotites; It is generally in the form of subhedral platy-prismatic, rod-like crystals. Pleochroism is seen in brown tones in single nicol. It has high birefringence colours and indicates vivid interference colours in yellowish, blue and green, especially brown tones in double nicol. Porphyritic texture in which phenocryst and smaller crystals are generally observed in granites.
A. Sar, M.A. Ertürk, M.E. Rizeli, 2019, Genesis of late Cretaceous intra-oceanic arc intrusions in the Pertek area of Tunceli Province, Eastern Turkey, and implications for the geodynamic evolution of the southern Neo-Tethys: results of zircon U–Pb geochronology and geochemical and Sr–Nd isotopic analyses. Lithos vol. 350–351, pp. 105263.
Y. Niu, Z. Zhao, D.C. Zhu, X. Mo, 2013, Continental collision zones are primary sites for net continental crust growth – a testable hypothesis, Earth Sci., vol. 127, pp. 96-110.
B.W. Chappell, A.J.R. White 1974, Two contrasting granite types Pac. Geol., vol. 8, pp. 173-174.
Y. Eyüboğlu, F.O. Dudas, D-C. Zhu, Z. Liu, N. Chatterjee, Late Cretaceous I- and A-type magmas in eastern Turkey: Magmatic response to double-sided subduction of Paleo- and Neo-Tethyan lithospheres, Lithos vol. 326-327, pp. 39-70.
A.J.R. White, 1979, Sources of granite magmas. Geological Society of America, Abstracts with Programs 11, 539.
M.C. Loiselle, D.R. Wones, 1979. Characteristics and Origin of Anorogenic Granites. 11. Geological Society of America Abstracts with Programs, p. 468.
T. Rızaoğlu, 2006, Baskil-Sivrice (Elaziğ) Arasinda Yüzeyleyen Tektonomagmatik Birimlerin Petrografisi Ve Jeokimyasi , PhD Thesis, Çukurova University, Adana.
M.A. Ertürk, A. Sar, M.E. Rizeli, 2022, Petrology, zircon U Pb geochronology and tectonic implications of the A1-type intrusions: Keban region, eastern Turkey. Geochemistry vol. 125882
M.A. Ertürk, M. Beyarslan, S.-L. Chung, T.-H. Lin, 2018, Eocene magmatism (Maden Complex) in the Southeast Anatolian Orogenic Belt: magma genesis and tectonic implications. Geosci. Front. vol. 9, pp. 1829–1847.
M. Beyarslan, E. Okta, M.A. Ertürk, 2018, Kale (Malatya) ˙Ilçesi Çevresindeki Geç Kretase Yas¸lı Yay Magmatitlerinin Jeokimyasal ¨Ozellikleri. Erzincan Univ. J. Sci. Technol. vol. 11 (2), pp. 191–206.
M.E. Rizeli, A. Sar, M.A. Ertürk, 2020, Keban Magmatik Kayaçları’nın Petrografik ve Jeokimyasal Özellikleri (Keban-Elazığ), Mühendislik Bilimleri ve Araştırmaları Dergisi, vol. 3, pp. 69-80.
D. Perinçek 1979, The Geology of Hazro–Korudağ–Çüngüş– Maden–Ergani–Hazar–Elazığ–Malatya Area: Guide Book, vol. 33, TJK.
M. Turan, and A. F. Bingöl, 1991, Kovancılar Baskil (Elazığ) Arası Bölgenin Tektono-stratigrafik Özellikleri. Ahmet Acar Geology Symposium, Proceedings, Çukurova University, Adana, 213-227.
M. Beyarslan, M.A. Ertürk, M.E. Rizeli, A.Sar, 2022, Doğu Anadolu Fay Sistemi Boyunca Gelişen Kuvaterner Yaşlı Mafik Alkali Harput Volkanik Kayaçları’nın Petrojenezi ve Tektonik Konumu, Güneydoğu Anadolu Orojenik Kuşağı (Elazığ), El Cezeri Fen ve Mühendislik Dergisi, vol. 9, pp. 171-188.
N. Avşar, 1989, Elazığ Bölgesinin Tersiyer Stratigrafisi. Selçuk University Müh. Mim. Fak. Dergisi, vol. 1, pp. 30-39.
A.I. Okay, O. Tüysüz, 1999, Tethyan sutures of northern Turkey. In: Durand, B., Jolivet, L., Horvath, F., Seranne, M. (Eds.), The Mediterranean Basins: Tertiary Extension Within the Alpine Orogen: Geological Society, London, Special Publications, vol. 156, pp. 475–515.
A.F. Bingöl, 1984. Elazığ-Petek-Kovancılar (Doğu Toroslar) yöresinin jeoljisi. Toros Jeolojisi Uluslararası Sempozyumu, Tebliğler, 26-29 Eylül 1983, Ankara.
M. Beyarslan, A.F. Bingöl, 2018, Zircon U-Pb age and geochemical constraints on the origin and tectonicimplications of late cretaceous intra-oceanic arc magmatics in the Southeast Anatolian Orogenic Belt (SE-Turkey), vol. 147, pp. 477-497.
I. Safonova, R. Seltmann, M. Sun, W. Xiao, 2017, Continental construction in central Asia and actualistic comparisons with western pacific: preface, Gondwana Res., vol. 47, pp. 1-5.
R. Stern, 2010, The anatomy and ontogeny of modern intra-oceanic arc systems, T.M. Kusky, M.-G. Zhai, W. Xiao (Eds.), The Evolving Continents: Understanding Processes of Continental Growth, Geological Society of London, vol. 338, pp. 7-34.