Petrographic and geochemical properties of the ignimbrites around Hatunsaray (Konya)

Yıl 2023, , 13 - 28, 24.10.2023

Hacer Bilgilioğlu , Halil Baş

https://doi.org/10.48053/turkgeo.1263303

Öz

The study area is located around the town of Hatunsaray, approximately 40 km away from the south-west of Konya. In this study, the petrological and geochemical characteristics of the Bulumya ignimbrite, Detse ignimbrite and Sadıklar ignimbrite observed in the region were revealed. The study area contains Upper Miocene - Lower Pliocene aged Güneydere formation and overlying Bulumya ignimbrite, Detse ignimbrite, Sadıklar ignimbrite and Quaternary alluviums. All these units were formed in the Upper Miocene - Lower Pliocene aged fluvial and lake environment and have a lateral vertical transition with carbonate, clastic units. The gray-colored Bulumya ignimbrite contains andesite-dacite rock fragments and large pumice grains. The Detse Ignimbrite is yellow in color and shows a well sorted lapilli tuff composition. The Sadıklar Ignimbrite, on the other hand, contains agglomeratic levels with yellow colored slightly fused lenses and wedge geometry. All ignimbrite samples have porphyric texture and were classified as “crystal-vitric tuff” and “crystal lithic-vitric tuff” in the glass-crystal-rock fragment classification. Petrographic investigations of ignimbrites show that major components are quartz, plagioclase, plagioclase microliths, biotite, amphibole, opaque minerals and rock fragments. Geochemical data shows that all ignimbrite samples are subalkaline, trachy-andesite, andesite-basaltic andesite and calc-alkaline in character. When the main oxide, trace and rare earth elements in ignimbrites are evaluated, fractional crystallization controlled by feldspar minerals is observed. In addition, the high K and Rb content in the spider diagrams indicate crustal contamination. The distribution of the ignimbrite samples in the Rb/Y-Nb/Y diagram suggests that the magma source forming the samples is enriched by subduction and/or crustal components.

Anahtar Kelimeler

Hatunsaray, Ignimbrites, Petrographic, Geochemical

Kaynakça

• Asan, K., & Erturk, M.A. (2013). First Evidence of Lamprophyric Magmatism from the Konya Region, Turkey: a Genetic Link to High-K Volcanism. Acta Geologica Sinica-English Edition, 87(6), 1617-1629.
• Boynton, W.V. (1984). Cosmochemistry of the rare earth elements: meteorite studies. In Developments in geochemistry (Vol. 2, pp. 63-114). Elsevier.
• Carozzi, A.V. (1993). Sedimentary Petrography: PTR Prentice Hall. Inc. Nova Jersey.
• Cas, R.A.F., & Wright, J.V. (1988). An Introduction to facies analysis in volcanic terrains. Volcanic Successions Modern and Ancient: A geological approach to processes, products and successions, 2-12.
• Edwards, C., Menzies, M., & Thirlwall, M. (1991). Evidence from Muriah, Indonesia, for the interplay of supra-subduction zone and intraplate processes in the genesis of potassic alkaline magmas. Journal of petrology, 32(3), 555-592.
• Eren, Y. (1993). Konya kuzeybatisinda Bozdaglar masifinin otokton ve örtü birimlerinin stratigrafisi. Türkiye jeoloji bülteni, 36(2), 7-23.
• Eren, Y. (1993), The Geology of the Eldeş-Derbent-Tepeköy-Söğütözü (Konya) region (PhD thesis). Selçuk University. Konya, Turkey (in Turkish).
• Göğer, E., & Kıral, K. (1973). Kızılören dolayının (Konya’nın batısı) genel stratigrafisi. MTA Rapor, (5204).
• Irvine, T.N., & Baragar, W.R.A. (1971). A guide to the chemical classification of the common volcanic rocks. Canadian journal of earth sciences, 8(5), 523-548.
• Keller, J., Jung, D., Burgath, K., & Wolff, F. (1977). Geologie und Petrologie des neogenen Kalkalkali-Vulkanismus von Konya (Erenler Dag-Alaca Dag-Massiv, Zentral-Anatolien).
• Kempler, D., & Garfunkel, Z. (1991). The northeast Mediterranean triple junction from a plate kinematics point of view. Bull. Tech. Univ. Istanbul, 44(spec. issue), 425-454.
• Koçak, K. (2012). Geochemical characteristics of the Late Miocene to Pliocene Ulumuhsine sill of the Erenlerdagi volcanics, Konya, Central Turkey. School «Geochemistry of Alkaline rocks» Ore potential of alkaline, kimberlite and carbonatite magmatism, 2012, 14-18 September, Sudak, Ukraine.
• Koçak, K. (2017). Geochemical Characteristics of the Mafic Enclaves and Their Hosts from Neogene Erenlerdagi Volcanites, around Yatagan Village and Sağlik Town (Konya), Central Turkey. Bulletin of the Geological Society of Greece, 50(4).
• Kocak, K. (2021). Geological Characteristics of The Neogene Volcanic Plugs in Inlıce (Konya) Area, Central Turkey Proceedings 2021.
• Kocak, K., & Kaya, R.M. (2019). Chemical and Mineralogical Characteristics of the Microscopic-sized Epidotes in the Metamorphic Basement Rocks within the Late Cretaceous Hatip Ophiolitic Melange in Konya (Central Southern Turkey). Hittite Journal of Science and Engineering, 6(3), 167-172.
• Kurt, H., Özkan, A.M., & Kocak, K. (2003). Geology, Petrography And Geochemistry Of The Subduction Related Volcanic Rocks, West Of Konya, Central Anatolia. Türkiye Jeoloji Bülteni, 46(2), 39 – 51.
• Marshall P. (1935). Acid rocks of Tanpo-Rotorua volcanic district. Trans,, R. Soc, N.Z., 64.. 323-375.
• McKenzie, D. (1972). Active tectonics of the Mediterranean region. Geophysical Journal International, 30, 109-185.
• McKenzie, D., & Yılmaz, Y. (1991). Deformation and volcanism in western Turkey and the Aegean. Bulletin of the Technical University of Istanbul, 44(1-2), 345-373.
• McPhie, J. (1993). Volcanic textures: a guide to the interpretation of textures in volcanic rocks.
• Ota R. & Dinçel A. (1975). Volcanic rocks of Turkey Bull. Geol. Surv. Jpn., 26, pp. 19-45.
• Özcan, A., Göncüoğlu, M.C., Turhan, N., Şentürk, K., Uysal, S., & Işık, A. 1990. Konya – Kadınhanı – ılgın dolayının temel jeolojisi ; M.T.A. rap. 736, Konya.
• Pearce, J. (1996). Sources and settings of granitic rocks. Episodes Journal of International Geoscience, 19(4), 120-125.
• Pearce, J.A., Harris, N.B., & Tindle, A.G. (1984). Trace element discrimination diagrams for the tectonic interpretation of granitic rocks. Journal of petrology, 25(4), 956-983.
• Peccerillo, A., & Taylor, S.R. (1976). Geochemistry of Eocene calc-alkaline volcanic rocks from the Kastamonu area, northern Turkey. Contributions to mineralogy and petrology, 58, 63-81.
• Rollinson, H.R. (1993). Using geochemical data: Evaluation, presentation, interpretation. John Wiley & Sons Inc., New York. 352pp.
• Schmid, R. (1981). Descriptive nomenclature and classification of pyroclastic deposits and fragments: Recommendations of the IUGS Subcommission on the Systematics of Igneous Rocks. Geologische Rundschau, 70, 794-799.
• Şengör, A.M.C., Görür, N., & Şaroğlu, F. (1985). Strike-slip faulting and related basin formation in zones of tectonic escape: Turkey as a case study.
• Soğucaklı Ö., (2006). The Geology of Hatunsaray - Çatören district (Western Konya), (MSc thesis). Selçuk University, Konya, Turkey (in Turkish).
• Sparks, R.S.J., Self, S., & Walker, G.P. (1973). Products of ignimbrite eruptions. Geology, 1(3), 115-118.
• Sun, S.S., & McDonough, W.F. (1989). Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes. Geological Society, London, Special Publications, 42(1), 313-345.
• Temel, A., Çelik, M., & Tunoğlu, C. (1995). Konya batı-güneybatısında yer alan Neojen yaşlı volkanosedimanter basenindeki kil oluşumları. In VII National Clay Symposium (pp. 32-45).
• Temel, A., Gündoğdu, M.N., Gourgaud, A., & Le Pennec, J.L. (1998). Ignimbrites of Cappadocia (central Anatolia, Turkey): petrology and geochemistry. Journal of Volcanology and Geothermal Research, 85(1-4), 447-471.
• Turan, A., Küpeli, Ş., & Karakoç, İ. (1997). Loras Dağı-Çaldağı ile Hatunsaray (Konya batısı) arasında kalan bölgenin stratigrafisi ve bazı tektonik özellikleri. Geosound, 1(30), 305-318.
• Ulu, Ü., Öcal, H., Bulduk, A.K., Karakaş, M., Arbas, A., Saçlı, L., & Karabıyıkoğlu, M. (1994). Cihanbeyli-Karapınar yöresi geç Senozoyik çökelme sistemi: Tektonik ve iklimsel önemi. Türkiye Jeoloji Kurultayı Bülteni, 9, 149-163.
• Uyanık, C., & Koçak, K. (2016). Geochemical Characteristics of the Erenlerdagi Volcanics, Konya, Central Turkey. Bulletin of the Geological Society of Greece, 50(4), 2057-2067.