MINERALOGICAL AND CHEMICAL CHARACTERISTICS OF THE AMPHIBOLE MINERALS FROM THE METAMORPHIC SOLE ROCKS OF THE LATE CRETACEOUS-AGED HATIP OPHIOLITIC MÉLANGE IN THE KONYA AREA (CENTRAL SOUTHERN TURKEY)

Kerim KOÇAK; Raziye Merve KAYA; Adnan DOYEN; Ali Rıza SÖĞÜT; Veysel ZEDEF

MINERALOGICAL AND CHEMICAL CHARACTERISTICS OF THE AMPHIBOLE MINERALS FROM THE METAMORPHIC SOLE ROCKS OF THE LATE CRETACEOUS-AGED HATIP OPHIOLITIC MÉLANGE IN THE KONYA AREA (CENTRAL SOUTHERN TURKEY)

Kerim KOÇAK, Raziye Merve KAYA, Adnan DOYEN, Ali Rıza SÖĞÜT, Veysel ZEDEF

Öz

In the Konya area, the Neotethyan assemblage is represented by Late Cretaceous aged Hatıp Ophiolitic Mélange, in where the metamorphic sole rocks crop out as thin slices beneath the sheared serpentinites and harzburgites, and Çayırbağı ophiolite. This study aims to characterize the mineralogical characteristics and chemical composition of the amphiboles in the metamagmatic sole rocks of the Hatıp Ophiolitic Mélange. The main rock types in the metamorphic sole rocks are amphibolite (amphibole up to 90.3 %); epidote-amphibolite (65.3% amphibole); zoisite-amphibolite (amphibole 52.2%) and amphibole-quartzite (amphibole 28.5%) with nematoblastic to porphyroblastic texture. The microprobe analyses of the amphiboles suggest that the amphiboles have crystallized from a wet magma in medium pressure condition (≤ 7 kb), and are magnesiohornblende, pargasite and edenite in composition. The obtained data also reveal that the Neotethyan assemblage has experienced a regional metamorphism in greenschist facies conditions, which resulted in no chemical changes in the amphiboles.

Anahtar Kelimeler

Ophiolite, metamorphic sole, amphibolite, Konya

Tam Metin:

PDF (English)

Referanslar

Altunel, E., 1963, "Ilgin-Konya sheet: 1:500,000". In: I.o.M.R.a. Exploration (Editor).

Brown, E.H., 1977, "The crossite content of Ca-Amphibole as a guide to pressure of metamorphism", Journal of Petrology, 18: 53-72.

Dasci, H.T., Parlak, O., Nurlu, N. and Billor, Z., 2015, "Geochemical characteristics and age of metamorphic sole rocks within a Neotethyan ophiolitic melange from Konya region (central southern Turkey)", Geodinamica Acta, 27(4): 223-243.

Droop, G.T.R., 1987, "A General Equation for Estimating Fe-3+ Concentrations in Ferromagnesian Silicates and Oxides from Microprobe Analyses, Using Stoichiometric Criteria", Mineralogical Magazine, 51(361): 431-435.

Eren, Y., 1993, "Konya kuzeybatısında Bozdağlar Masifinin otokton ve örtü birimlerinin stratigrafisi (in Turkish)", Geol Bull Turk, 36: 7-23.

Eren, Y., Kurt, H., Rosselet, F. and Stampfli, G.M., 2004, "Palaeozoic deformation and magmatism in the northern area of the Anatolide block (Konya), witness of the Palaeotethys active margin", Eclogae Geologicae Helvetiae, 97(2): 293-306.

Giret, A., Bonin, B. and Leger, J.M., 1980, "Amphibole Compositional Trends in Oversaturated and Undersaturated Alkaline Plutonic Ring-Complexes", Canadian Mineralogist, 18: 481-495.

Goncuoglu, M.C., Capkinoglu, S., Gursu, S., Noble, P., Turhan, N., Tekin, U.K., Okuyucu, C. and Goncuoglu, Y., 2007, "The Mississippian in the Central and Eastern Taurides (Turkey): constraints on the tectonic setting of the Tauride-Anatolide Platform", Geologica Carpathica, 58(5): 427-442.

Hawthorne, F.C., Oberti, R., Harlow, G.E., Maresch, W.V., Martin, R.F., Schumacher, J.C. and Welch, M.D., 2012, "Nomenclature of the amphibole supergroup", American Mineralogist, 97(11-12): 2031-2048.

Johannes, W., 1978, "Melting of plagioclase in the system Ab-An-H2O and Qz-Ab-An-H2O at PH2O=5 kbars, an equilibrium problem", Contributions to Mineralogy and Petrology, 66: 295–303.

Laird, J. and Albee, A.L., 1981, "Pressure, Temperature, and Time Indicators in Mafic Schist - Their Application to Reconstructing the Polymetamorphic History of Vermont", American Journal of Science, 281(2): 127-175.

MTA, 2002, "1/500 000 scale geological maps of Turkey. General Directorate of Mineral Research and Exploration, Ankara.

Mackenzie, D.B., 1960, "High temperature Alpine-type peridotite from Venezuela", Bull. geol. Soc. Am, 71: 303-18.

Okay, A.I., 1986, "High-pressure/low temperature metamorphic rocks of Turkey.", Geol. Soc. Amer. Mem, 164: 338-348.

Özcan, A., Göncüoğlu, M.C., Turhan, N., Şentürk, K., Uysal, Ş. and Işık, A., 1990, Konya-Kadınhanı-Ilgın dolayının temel jeolojisi (in Turkish), MTA Genel Müdürlüğü Jeoloji Etütleri Dairesi.

Özcan, A., Göncüoğlu, M.C., Turhan, N., Uysal, S. and Şentürk, K., 1988, "Late Palaeozoic evolution of the Kütahya-Bolkardağ Belt.", METU Journal of Pure and Applied Science, 21: 211-220.

Parlak, O., Hock, V. and Delaloye, M., 2002, "The supra-subduction zone Pozanti-Karsanti ophiolite, southern Turkey: evidence for high-pressure crystal fractionation of ultramafic cumulates", Lithos, 65(1-2): 205-224.

Raase, P., 1974, "Al and Ti Contents of Hornblende, Indicators of pressure and temperature of regional metamorphism ", Contributions to Mineralogy and Petrology, 45(3): 231-236.

Robertson, A.H.F. and Ustaomer, T., 2009, "Formation of the Late Palaeozoic Konya Complex and comparable units in southern Turkey by subduction-accretion processes: Implications for the tectonic development of Tethys in the Eastern Mediterranean region", Tectonophysics, 473(1-2): 113-148.

Saha, A., Dhang, A., Ray, J., Chakraborty, S. and Moecher, D., 2010, "Complete preservation of ophiolite suite from south Andaman, India: A mineral-chemical perspective", Journal of Earth System Science, 119(3): 365-381.

Williams, H. and Smyth, W.R., 1973, "Metamorphic aureoles beneath ophiolite suites and Alpine peridotites: tectonic implications with west Newfoundland examples", Am. J. Sci., 273: 594-621.

Zedef, V., 1994, The origin of magnesite in Turkey, a stable isotope study, Glasgow University, Glasgow, UK, 159 pp.

Zedef, V., Russell, M.J., Fallick, A.E. and Hall, A.J., 2000, "Genesis of vein stockwork and sedimentary magnesite and hydromagnesite deposits in the ultramafic terranes of southwestern Turkey: A stable isotope study", Economic Geology and the Bulletin of the Society of Economic Geologists, 95(2): 429-445.