Petrographic, Geochemical and Petrological Characteristics of Neogene (?) Volcanicsin the Doğanşehir-Eskiköy (Malatya) Region

Abstract

In this study, petrographic and geochemical properties of Neogene (?)volcanic rocks in Eskiköy-Doğanşehir (Malatya) region were investigated. The study area consists of Permo-Triassic Malatya metamorphics, Late Cretaceous Berite ophiolite, Early-Middle Eocene Doğanşehir, Polat-Beğre granitoids, Neogene (?) volcanics, and Plio-Quaternary alluviums. The investigated volcanic rocks exposed the Permo-Triassic Malatya metamorphic rocks by cutting with hot contact. Volcanics in dacite and rhyolite composition mainly consist of plagioclase, sanidine, quartz, biotite and amphibole minerals. These volcanics have calc-alkali and high-K calc-alkali characters. In the primitive mantle normalized multi-element and chondrite-normalized rare earth element variation diagram, large ion lithophile elements and light rare earth elements show enrichment and are thought to be caused by a mantle metasomatized by solutions derived from the oceanic crust due to subduction.

Keywords

• Geochemistry
• Malatya
• Neogene volcanics
• Petrography

Doğanşehir-Eskiköy (Malatya) Bölgesindeki Neojen Yaşlı (?) Volkanik Kayaçların Petrografik, Jeokimyasal ve Petrolojik Özellikleri

Abstract

Bu çalışmada Eskiköy-Doğanşehir (Malatya) bölgesindeki Neojen (?) yaşlı volkanik kayaçlarının petrografik ve jeokimyasal özellikleri incelenmiştir. Çalışma bölgesi Permo-Triyas yaşlı Malatya metamorfitleri, Üst Kretase yaşlı Berit ofiyoliti, Erken-Orta Eosen yaşlı Doğanşehir, Polat-Beğre granitoidi, Neojen (?) yaşlı volkanitler ve Plio-Kuvaterner yaşlı alüvyonlardan oluşmaktadır. İncelenen volkanik kayaçlar Permo-Triyas yaşlı Malatya metamorfik kayaçlarını sıcak dokanakla keserek yüzeylemişlerdir. Dasit ve riyolit bileşimindeki volkanitler başlıca plajiyoklas, sanidin, kuvars, biyotit ve amfibol minerallerinden oluşurlar. Söz konusu volkanitler kalk-alkali ve yüksek-K kalk-alkali karaktere sahiptirler. Primitif mantoya normalize edilmiş çoklu element ve kondrite normalize edilmiş nadir toprak element değişim diyagramında büyük iyon yarıçaplı litofil elementleri ve hafif nadir toprak elementleri zenginleşme göstermektedir ve yitime bağlı olarak okyanusal kabuktan türeyen çözeltiler tarafından metasomatize edilmiş bir mantodan kaynaklandığı düşünülmektedir.

Keywords

• Jeokimya
• Malatya
• Neojen volkanitleri
• Petrografi

References

1. A. M. C. Şengör and Y. Yılmaz, “Tethyan evolution of Turkey: a plate tectonic approach,” Tectonophysics, vol. 75, pp. 181–241, 1981.
2. [2] Y. Yılmaz, “New evidence and model evolution of the southeast anatolian orogen”, Geological Society of America Bulletin, vol.105, pp.251–271, 1993.
3. [3] R. Oberhänsli, O. Candan, R. Bousquet, G. Rimmele, A. Okay and J. Goff, “Alpine high pressure evolution of the eastern Bitlis complex, SE Turkey”, Geological Society, London, Special Publications, vol. 340, no.1, pp.461–483,2010.
4. [4] A. M. C. Şengör, “Türkiye'nin Neotektoniği’nin Esasları,” TJK Konferans Serisi, c. 2, s. 2, ss.1–40, 1980.
5. [5] F. Şaroğlu, Y. Güner, W. S. F. Kidd, and A. M. C. Şengör, “Neotectonics of Eastern Turkey: New evidence for Crustal shortening a collision zone”, EOS Transactions American Geophysical, vol.51, no.17, pp. 360–380, 1980.
6. [6] J. A. Pearce, J. F. Bender, S. E. De Long, W. S. F. Kidd, P. J. Low, Y. Güner, F. Şaroğlu, Y. Yılmaz, S. Moorbath, and J. G. Mitchell, “Genesis of collision volcanism in Eastern Anatolia, Turkey” Journal of Volcanology and Geothermal Research, vol.44, no.1–2, pp.189–229, 1990.
7. [7] M. Keskin, “Magma generation by slab steepening and breakoff beneath a subduction accretion complex: an alternative model for collision- related volcanism in Eastern Anatolia, Turkey”,Geophysical Research Letters, vol. 30, pp. 8046–8050, 2003.
8. [8] M. Keskin, J. A. Pearce, P. D. Kempton, and P. Greenwood, “Magmacrust interactions and magma plumbing in a postcollisional setting: Geochemical evidence from the Erzurum-Kars volcanic plateau, eastern Turkey”, In: Dilek, Y. &Pavlides, S (eds), Postcollisional Tectonics and Magmatism in the Mediterranean Region and Asia,Geological Society of America, Special Paper,vol.409, pp.475–505,2006.

9. [9] M. Keskin, “Eastern Anatolia: a hotspot in a collision zone without a mantle plume,In: Foulger, G.R., Jurdy, D.M. (Eds.), Plates, Plumes, and Planetary Processes”, Geological Society of America Special Paper, vol.430, pp.693–722,2007.
10. [10] T. Ekici, M. Alpaslan, O. Parlak, and A. Temel, “Geochemistry of the Pliocene basalts erupted along the Malatya-Ovacık fault zone (MOFZ), eastern Anatolia, Turkey: implications for source characteristics and partial melting processes”, Chemie der Erde, 67, 201–212, 2007.
11. [11] T. Ekici, M. Alpaslan, O. Parlak, and A.Uçurum, “Geochemistry of the Middle Miocene collision-related Yamadağı (Eastern Anatolia) Calc-alkaline Volcanics, Turkey”, Turkish Journal of Earth Sciences,vol.18, pp.511–528, 2009.
12. [12] A.Önal, D. Boztuğ, M. Arslan, T. L. Spell, and S. Kürüm, “Petrology and 40Ar-39Ar age of the bimodal Orduzu Volcanics (Malatya) from the western end of the eastern Anatolian Neogene volcanism, Turkey,” Turkish Journal of Earth Sciences, vol.17, pp.85–109.2008.
13. [13] S. Kürüm, A. Önal, D. Boztuğ, T. Spell, and M. Arslan, “40Ar/39Ar age and geochemistryof the post-collisionalMiocene Yamadağ volcanics in the Arapkir area (Malatya Province),eastern Anatolia, Turkey”,Journal of Asian Earth Sciences, vol.33, pp.229–251, 2008. [14] V. Oyan, M. Keskin, V. A. Lebedev, A. V. Chugaev, and E. V. Sharkov, “Magmatic evolution of the early Pliocene Etrüsk stratovolcano, eastern Anatolian collision zone, Turkey,” Lithos, vol. 256–257, pp. 88–108,2016.
14. [15] T. Ekici,“Collision-related slab break-off volcanism in the Eastern Anatolia, Kepez volcanic complex (TURKEY)”, Geodinamica Acta, vol. 28, no. 3, pp. 223-239, 2016.
15. [16] P. Di Giuseppe, S. Agostini, M. Lustrino, Ö. Karaoğlu, M. Y. Savaşçın, P. Manetti, and E.Y. Ersoy, “Compression to strike-slip tectonics shift as revealed by Miocene-Pleistocene volcanismwest of the Karlıova triple junction (East Anatolia),” Journal of Petrology, vol. 58, pp. 2055–2087. 2017.
16. [17] P. Di Giuseppe, S. Agostini, G. Di Vincenzo, P. Manetti, M.Y. Savaşçın, and S. Conticelli. “From subduction to strike slip‑related volcanism: insights from Sr, Nd, and Pb isotopes and geochronology of lavas from Sivas–Malatya region, Central Eastern Anatolia,” vol. 110, pp. 849–874, 2021.
17. [18] A. Koçaarslan and E. Y. Ersoy, “Petrologic evolution of Miocene–Pliocene mafic volcanism in the Kangal and Gürün basins (Sivas– Malatya), central east Anatolia: evidence for Miocene anorogenic magmas contaminated by continental crust,” Lithos, vol.310–311, pp. 392–408, 2018.
18. [19] W.K.Schleiffarth, M.H.Darin, M.R.Reid, andP.J.Umhoefer, “Dynamics of episodic Late Cretaceous–Cenozoic magmatism across Central to Eastern Anatolia: New insights from anextensive geochronology compilation” Geosphere, vol.14, no.5, pp.1–19, 2018.
19. [20] A. Aktağ, A. Öztüfekçi Önal, and K. Sayit, “Geochemistry of the post-collisional Miocene mafic Tunceli Volcanics, Eastern Turkey: Implications for the nature of the mantle source and melting systematics” Chemie der Erde, vol.79,pp.113-129, 2019.
20. [21] S. Kürüm, T. Baykara, “Geochemistry of post-collisional Yolçatı (Bingöl) volcanic rocks in Eastern Anatolia, Turkey”, Journal of African Earth Science, vol.161, 103653, 2020.
21. [22] Ö. Karaoğlu,F. Gülmez,G, Göçmengil M, Lustrino, P. Di Giuseppe, and P. Manetti, M.Y. Savaşçın,and S. Agostini,“Petrological evolution of Karlıova-Varto volcanism (Eastern Turkey): magma genesis in a transtensional triple-junction tectonic setting”, Lithos, pp.364–365, 105524,2020.
22. [23] E. Yiğitbaş, “Engizek dağı (Kahramanmaraş) dolayındaki tektonik birliklerin petrolojik incelenmesi”, Doktora Tezi, İstanbul Üniversitesi Fen Bilimleri Enstitüsü,İstanbul, Türkiye, 1989.
23. [24] A. Önal, “Polat-Beğre (Doğanşehir) çevresindeki magmatik kayaçların petrografik ve petrolojik özellikleri”, Doktora Tezi, Fırat Üniversitesi Fen Bilimleri Enstitüsü, Elazığ, Türkiye, 1995.
24. [25] A. Önal, M. Altunbey, “Dedeyazı-Çavuşlu (Doğanşehir-Malatya) yöresindeki skarn oluşumlar ve ilişkili demir cevherleşmeleri”, Türkiye Jeoloji Bülteni, c.1, ss.15–27, 1999.
25. [26] F. Karaoğlan, "Günedoğru-Beğre (Doğanşehir-Malatya) Arasında Yüzeyleyen Tektonomagmatik Birimlerin Petrografisi ve Jeokimyası”, Yüksek Lisans Tezi, Çukurova Üniversitesi Fen Bilimleri Enstitüsü, Adana, Türkiye, 2005.
26. [27] E. Yazgan, R. Chessex, “Geology and tectonic evolution of the southeastern Taurides in the region of Malatya”, Turkish Assoc. Petrol Geol.,c.3, s.1, ss.1–42, 1991.
27. [28] Y. Yılmaz, “New evidence and model on the evolution of the Southeast Anatolian orogeny”, Geological Society of the America Bulletin, vol.105, pp.251–271, 1993.
28. [29] M. Önal ve A.M. Gözübol, “Çat Baraji isale tünelinin mühendislik jeolojisi ve kaya mekanigi incelemesi ve Malatya-Çelikhan yöresinin jeolojisi”, Tübitak Projesi Raporu,ss.647, 1986.
29. [30] A. Önal ve M. Beyarslan, “Doğanşehir (Malatya) civarındaki ofiyolitik kayaçların jeolojik ve petrografik özellikleri”, Selçuk Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi, c. 16, s. 2, ss. 66–75, 2001.
30. [31] F. Karaoğlan, O. Parlak, A. Robertson, M. Thöni, U. Klötzli, F. Koller, and A.I. Okay, "Evidence of Eocene high-temperature/high-pressure metamorphism of ophiolitic rocks and granitoid intrusion related to Neotethyan subduction processes (Dogansehir area, SE Anatolia)," 7th International Symposium on Eastern Mediterranean Geology, , Adana, Turkey, pp.249–272, 2010.
31. [32] M. A. Ertürk, “Maden Karmaşığı’nın (Doğu Toroslar-Türkiye) petrolojik özellikleri”, Doktora Tezi, Fırat Üniversitesi Fen Bilimleri Enstitüsü, Elazığ, Türkiye, 2016.
32. [33] M. A. Ertürk, M. Beyarslan, S.L. Chung, and T. Lin, “Eocene magmatism (Maden Complex) in the Southeast Anatolian Orogenic Belt: Magma genesis and tectonic implications” Geoscience Frontiers, vol.9, pp.1829–1847, 2018.
33. [34] M.T.A, “1/500.000 ölçekli Türkiye Jeoloji Haritası”, Maden Tetkik ve Arama Genel Müdürlüğü, Ankara, Türkiye, 2002.
34. [35] M.J. Le Bas, R.W. Le Maitre, A. Streckeisen, and B. Zanettin, “A chemical classification of volcanic rocks based on the total alkali-silica diagram”, J. Petrology, vol. 27, no. 3, pp.745–750, 1986.
35. [36] A. Peccerillo, S.R. Taylor, "Geochemistry of Eocene calcalkaline volcanic rocks from the Kastasmonu area, north Turkey", Contrib. Miner. Petrol, vol. 58, pp. 63–81, 1976.
36. [37] S. Sun and W.F. McDonough, “Chemical and isotopic systematic of oceanic basalts. Implications for mantle compositional processes. In: Saunders, A.D., Norry, M.J.(Eds.), Magmatism in the Ocean Basins”, Special Publication Geological Society of London, vol. 42, pp. 313–345, 1989.
37. [38] W.V. Boynton, “Geochemistry of rare earth elements: meteorite studies”, In: Henderson, P. (Ed.), Rare Earth Element Geochemistry. Elsevier, New York, pp.63–114, 1984.
38. [39] J. A. Pearce, “Trace Element Characteristics of Lavas from Destructive Plate Boundaries. In: Thorpe, R.S. (eds) Andesites, Orogenic Andesites and Related Rocks”, J. Wiley and Sons, pp.525–548, 1982.
39. [40] M. T. McCulloch and J. A. Gamble, “Chemical and geodynamic constraints on subduction zone magmatism” Earth and Planetary Science Letters, vol.102, pp.358–374, 1991.
40. [41] W.F. McDonough, “Geochemical and isotopic systematics of continental lithospheric mantle. In: kimberlites, Related Rock and Mantle Xenoliths”, Meyer, H.O.A. and Leonardos, O. H. (Ed.).Companhian de Pequisa de Recursos Minerais, Rio de Janeiro, no.1, pp.478–485, 1991.
41. [42] M. F. Thirwall, T. E. Smith, A. M. Graham, N. Theodorou, P. Hollings, J. P. Davison and R.J. Arculus, “High field strength element anomalies in arc lavas: source or Process” Jour. Petrology, vol.35, pp.819–838, 1994.
42. [43] J. A. Pearce and D.W. Peate, “Tectonic implications of the composition of volcanic arc magmas” Annual Review of Earth and Planetary Sciences, vol.23, pp.251–285, 1995.
43. [44] M. A. Menzies, “Mantle ultramafic xenoliths in alkaline magmas: evidence for mantle heterogeneity modified by magmatic activity”, In: C.J.Hawkesworth and M.J.Norry (Editors), Continental Basalts and Mantle Xenoliths, Shiva, Nantwich, pp.92–110, 1983.
44. [45] S. J. G. Galer and R. K., O'Nions, “Residence time of thorium, uranium and lead in the mantle with implications for mantle convection”, Nature (London), vol.316, pp.778–782, 1985.
45. [46] Y. Huang, C. Hawkesworth, I. Smith, P. van Calsteren, and P. Black, “Geochemistry of late Cenozoic basaltic volcanism in Northland and Coromandel, New Zealand: implications for mantle enrichment processes”, Chem. Geol.,vol.164, no.15, pp.219–238, 2000.
46. [47] M. J. Defant, T. E. Jackson, M. S. Drummond, J. Z. De Boer, H. Bellon, M. D. Feigenson, R. C. Maury, and R. H. Stewart, “The geochemistry of young volcanism throughout western Panama and southeastern Costa Rica: an overview”, Journal of the Geological Society of London, vol.149, pp.569–579, 1992.
47. [48] R. C. Maury, F.G., Sajona, M. Pubellier, H, Bellon, and M.J. Defant, “Fusion de la croûte océanique dans les zones de subduction/collision récentes: L'exemple de Mindanao (Philippines)”, Bull. Soc. Géol., France, vol.167, pp.579–595, 1996.
48. [49] F.G. Sajona, R.C. Maury, H. Bellon, J. Cotton, and M. Defant, “High field strength element enrichment of Pliocene–Pleistocene island arc basalts, Zamboanga Peninsula, Western Mindanao (Philippines)”, Journal of Petrology,vol.37, no.3, pp.693–726, 1996.
49. [50] H. Martin, R.H. Smithies, R. Rapp, J.-F. Moyen, and D. Champion, “An overview of adakite, tonalite-trondhjemite granodiorite (TTG), and sanukitoid: Relationships and some implications for crustal evolution”, Lithos, vol.79, pp.1–24, 2005.
50. [51] C. Deniel, E. Aydar, and A. Gourgaud, “The Hasan Dagi stratovolcano (Central Anatolia, Turkey): evolution from calc-alkaline to alkaline magmatism in a collision zone” J. Volcanol. Geotherm. Research,vol.87, no.1–4, pp.275–302, 1998.
51. [52] S.R. Taylor, S.M. McLennan, “The Continental Crust: its Composition and Evolution”, Blackwell Scientific Publication, pp.312, Oxford, 1985.
52. [53] J.A. Pearce, “Geochemical fingerprinting of oceanic basalts with applications to ophiolite classification and the search for Archean oceanic crust”, Lithos,vol.100,no.1–4, pp.14–48, 2008.