Ladik ve Esirağıl Alanı (Konya, Orta Anadolu) Yöresindeki Geç Silüriyen Erken Karbonifer Yaşlı Metakarbonatların Metamafik Dayklarla Kontak Metamorfizması

Abstract

Konya’nın KKB’da dayk topluluğu veya muhtemelen dayk oluşturan magmanın yerleşimi ile gelişen bir dizi normal faylar tarafından kesilmiş izole çizgisel dayklar şeklinde mafik kayaçlar oluşur. Faylanmış Triyas yaşlı metamafik dayklara komşu Silüryen-Erken Karbonifer yaşlı metakarbonatlar ve sokulumdaki çatı askıları içerisinde, ilk kez su içermiyen oksitlenmiş Ca’ca zengin bazı skarn zonları belirlenmiştir. Metamafik kayaçların, sınırlı skarn zonunun gelişimine neden olan düşük sıcaklığa ve az miktarda (veya yok) kristalleşme sıcaklığına sahip olduğu ileri sürülmüştür. Mineralojik çalışmalar, skarnın granat, manyetit/hematit, klorit ve serisitten oluştuğunu gösterir. Manyetit/hematit mineralleri, klorit ve açık renkli mineraller tarafında kemirilebilen veya götit tarafından çevrilen, çoğunlukla 0.5 cm uzunluğa kadar gelişmiş özşekilli kristaller şeklinde oluşur. Granat tipik olarak ~1.5 mm boyuta kadar ulaşan harikulade özşekilli iri kristaller şeklinde oluşur. Bölgede klorit ve serisitin varlığı ve hornblend, biyotit ve vollastonitin yokluğu kontakt metamorfizmanın düşük basınç, nispeten düşük sıcaklık (albit-epidot hornfels) ve/veya yüksek CO2 şartlarında yer aldığına işaret eder.

Keywords

• Skarn
• dayk topluluğu
• granat
• Konya
• dyke swarm
• garnet

CONTACT METAMORPHISM OF LATE SILURIAN-EARLY CARBONIFEROUS METACARBONATES BY METAMAFIC DYKES AROUND LADIK AND ESIRAĞIL AREA (KONYA, CENTRAL TURKEY)

Abstract

In NNW Konya, mafic rocks form as dyke swarm or isolated linear dykes, which are cut by a series of normal faults that developed possibly by emplacement of the dyke-forming magma. Some anhydrous oxidized calcic skarn zones have ever been found out in Silurian-Early Carboniferous metacarbonates next to the Triassic metamafic dykes faulted, and in roof pendants within the intrusion. The metamafic rocks are suggested to have a low temperature and a small amount (or even absence) of the heat of crystallization, which causes the development of a restricted skarn zone. Mineralogical studies show that the skarn contains garnet, magnetite/hematite, chlorite, and sericite. The magnetite/hematite minerals form mostly as large euhedral crystals, up to 0.5 cm in length, which may be resorbed by chlorite and felsic minerals or rimmed by goethite. The garnet typically forms as spectacular euhedral large crystals, up to ~1.5 mm in size. The existence of chlorite and sericite, and the lack of hornblende, biotite and wollastonite in the region indicate that contact metamorphism took place under low pressure, relatively low temperatures (albite-epidote hornfels) and/or high CO2 conditions in the area.

Keywords

• Skarn
• dyke swarm
• garnet
• Konya.

References

1. Akal, C., Candan, O., Koralay, O.E., Oberhansli, R., Chen, F.K.Prelevic, D., 2012, "Early Triassic potassic volcanism in the Afyon Zone of the Anatolides/Turkey: implications for the rifting of the Neo-Tethys", International Journal of Earth Sciences, 101, 1, 177-194.
2. Anan’ev, V.A., 1999. Kontaktoviy metamorfizm Ayu-Daga (Contact metamorphism on the Ayu-Dagh mountain). . Candidate of Science Dissertation Thesis, Novosibirsk.
3. Aysal, N., Öngen, S.Hanilçi, N., 2006, "Petrography Of The Contact Zone Rocks And Features Of The Skarn Formation Of Karadoru Granitoid Pluton, Yenice", Çanakkale İstanbul Üniv. Müh. Fak. Yerbilimleri Dergisi, 19, 183-194, .
4. Bell, I.A.Wilson, C.J.L., 1981, "Deformation of Biotite and Muscovite - Tem Microstructure and Deformation Model", Tectonophysics, 78, 1-4, 201-228.
5. Boztuğ, D.Yılmaz, O., 1995, "Daday-Devrekani masifi metamorfizması ve jeolojik evrimi, Kastamonu bölgesi, Batı Pontidler, Türkiye", Türkiye Jeoloji Bülteni, 38, 33-52.
6. Delesse, A., 1857, "Etudes sur le metamorphisme des roches.", Annales des Mines, 5a:12, 89–288.
7. Denbrok, S.W.J.Spiers, C.J., 1991, "Experimental-Evidence for Water Weakening of Quartzite by Microcracking Plus Solution Precipitation Creep", Journal of the Geological Society, 148, 541-548.
8. Eren, Y., 1993, "Konya kuzeybatısında Bozdağlar Masifinin otokton ve örtü birimlerinin stratigrafisi (in Turkish)", Geol Bull Turk, 36, 7-23.

9. Eren, Y., Kurt, H., 2000, "The stratigraphical, geochemical and geodynamical modelling of the northeast margin of Menderes-Tauris block", J Fac Eng Arch Selcuk Univ, 15, 25-41.
10. Ernst, R. E., Buchan, K. L., Palmer, H. C., 1995, "Giant dyke swarms: Characteristics, distribution and geotectonic applications", Physics and Chemistry of Dykes, 3-21.
11. Geikie, A., 1889, "II.—The History of Volcanic Action during the Tertiary Period in the British Isles", Transactions of the Royal Society of Edinburgh, 35, 1, 21-184.
12. Göncüoğlu, M.C., Kozur, H.W., Turhan, N.Göncüoğlu, Y., 2000, "Stratigraphy of the Silurian–Lower Carboniferous rock units in Konya area, VIII International Meeting of IGCP 421 in 1st Congresso Iberico de Paleontologia, Evora, 227–228.
13. Hou, G. T., Li, J. H., Liu, Y. L., Qian, X. L., 2006, "The late paleoproterozoic extension event: aulacogens and dyke swarms in the North China craton", Progress in Natural Science, 16, 2, 201-208.
14. Kerrick, D. M., 1991, "Overview of Contact-Metamorphism", Contact Metamorphism, 26, 1-12.
15. Kocak, K., 1993. The Petrology and geochemistry of the Ortaköy area, Central Turkey. PhD thesis Thesis, Glasgow U., Glasgow, 280
16. Kocak, K., Leake, B. E., 1994, "The Petrology of the Ortakoy District and Its Ophiolite at the Western Edge of the Middle Anatolian Massif, Turkey", Journal of African Earth Sciences, 18, 2, 163-174.
17. Koçak, K., 2020, "Outlines Of The Mafic Dyke Swarm From Ladik Area, Nw Konya/Turkey, International Scientific Conference GEOBALCANICA 2020, 79-83.
18. Kurt, H., 1994, Petrography and Geochemistry of Kadinhani (Konya) area, Central Turkey, Glasgow Uni., Glasgw, 191.
19. Kurt, H., 1996, "Geochemical characteristics of the meta-igneous rocks near Kadınhanı (Konya), Turkey", Geosound 28, 1-22.
20. Kurt, H., 1997, "Geochemistry of metasedimentary rocks of the Kadinhani (Konya) area, Turkey", GEOSOUND, 31, 1-21.
21. Kurt, H., Asan, K., 1999, "Geological Bulletin Of Turkey - Kadınhanı ( Konya ) K ' ca zengin metatrakiandezitinin jeokimyası ve petrojenezi", TJB, 42, 1, 57-67.
22. Lowen, K., Meinhold, G., Arslan, A., Gungor, T., Berndt, J., 2019, "Evolution of the Palaeotethys in the Eastern Mediterranean: a multi-method approach to unravel the age, provenance and tectonic setting of the Upper Palaeozoic Konya Complex and its Mesozoic cover sequence (south-central Turkey)", International Geology Review.
23. Okay, A. I., 1986, "High-pressure/low temperature metamorphic rocks of Turkey.", Geol. Soc. Amer. Mem, 164, 338-348.
24. Özcan, A., Göncüoğlu, M. C., Turhan, N., Şentürk, K., Uysal, Ş., Işık, A., 1990. Konya-Kadınhanı-Ilgın dolayının temel jeolojisi (in Turkish), MTA Genel Müdürlüğü Jeoloji Etütleri Dairesi.
25. Paterson, S. R., Vernon, R. H., Fowler, T. K., 2018, Aureole Tectonics. In: M.K. Derrill (Editor), Contact Metamorphism. De Gruyter, 673-722.
26. Reverdatto, V.V., Likhanov, I.I., Polyansky, O.P., Sheplev, V.S.Kolobov, V.Y., 2019, The Nature and Models of metamorphism. Springer Nature Switzerland AG, Switzerland, 330.
27. Robertson, A. H. F., Parlak, O., Ustaomer, T., 2021, "Late Palaeozoic extensional volcanism along the northern margin of Gondwana in southern Turkey: implications for Palaeotethyan development", International Journal of Earth Sciences, 110, 6, 1961-1994.
28. Robertson, A. H. F., 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.
29. Rosenbusch, H., 1877, Die Steiger Schiefer und ihre Contactzone an der Granititen von Barr-Andlau und Hohwald. . Abhandlungen zur Geol. Specialkarte von Elsass-Lothringen. Band I, Druch und Verlag von R. Schultz and Co., Strassburg.
30. Taner, M. F., Martin, R. F., Gault, R. A., 2013, "The Mineralogy Of Skarns Of The Spurrite–Merwinite Subfacies, Sanidinite Facies, Güneyce–Ikizdere Area, Eastern Black Sea, Turkey", The Canadian Mineralogist, 51, 6, 893-911.
31. Topuz, G., 2006, "Contact metamorphism around the Eocene Saraycik Granodiorite, eastern Pontides, Turkey", Turkish Journal of Earth Sciences, 15, 1, 75-94.
32. Turner, F. J., Verhoogen, J., 1960, Igneous and metamorphic petrology. International series in the earth sciences. McGraw-Hill, New York.
33. Vernon, R. H., 1975, "Deformation and recrystallization of a plagioclase grain", American Mineralogist, 60, 9-10, 884-888.