Türkiye Jeoloji Bülteni
Türkiye Jeoloji Bülteni

Türkiye Jeoloji Bülteni

2003 AĞUSTOS Cilt 46 Sayı 2
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Mineralogy and Geochemistry of Hydrotermal Kaolinite and IS Occurences, (Yıldızeli-Akdağmadeni) W-Sivas
Hüseyin Yalçin Ömer Bozkaya
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Abstract: The fracture systems of Eocene age seem to be revealed volcanic materials and hydrothermal fluids byreactivating possibly in Upper Miocene. Thus hydrothermal neoformation minerals, the products of interactionof thermal water and volcanogenic compounds, are occurred in the west of Sivas. Kaolinite and I-S are dominantly developed in the white-yellow altered volcanic rocks in the Şeyhhalil, Canabdal, Kiremitli and Kavakareas. Besides jarosite, alunite, goyazite, gypsum, barite, hematite, goethite, pyrite, marcasite, gibbsite, sideriteand tridymite minerals are determined in these rocks. Alunite and goyazite from Canabdal area are derived fromK-feldspar. Jarosite appears in the areas observed no alunite and accompanies usually goethite. The alterationsofbiotite and/or opaque minerals are necessary for formation of this mineral. A formation type similar to tonsteins can be proposed for kaolinite and I-S. Here first stage is the hydrolysis of volcanic glass by acidichydrothermal solutions and then the synthesis ofkaolinite or I-S from an intermediate product such a hydratedAl-silicate gel is possibly postulated.

  • Hydrothermal alteration

  • Kaolinite

  • I-S

  • Mineralogy

  • Geochemistry


  • Aktimur, H.T., Tekirli, M.E. ve Yurdakul, M.E., 1990. Sivas-Erzincan Tersiyer havzasının jeolojisi. MTA Dergisi, 111,25-36.

  • Bailey, S.W., 1988. X-ray diffraction identification of the polytypes of mica, serpentine, and chlorite. Clays and Clay Minerals, 36, 3, 193-213.

  • Bohor, B.F. ve Triplehorn, D.M.,1993. Tonsteins: Altered volcanic ash layers in coal bearing sequences. Geological Society of America, Special Paper, 285, 44 pp.

  • Boynton, W.V., 1984. Geochemistry of the rare earth elements: Meteorite studies. In: Geochemistry of the rare earth elements, Elsevier, Henderson, P. (ed.), pp. 63-114.

  • Çelik, M., Karakaya, N. and Temel, A., 1999. Clay minerals in hydrothermally altered volcanic rocks, Eastern Pontides, Turkey. Clays and Clay Minerals, 47,708-717.

  • Çerikcioğlu, B. ve Yalçın, H., 1998. YıldızeliAkdağmadeni arasındaki (Yavu çevresi) Eosen yaşlı volkanojenik kayaçlarla ilişkili kil minerallerinin mineralojisi ve jeokimyası. C.Ü. Mühendislik Fakültesi Dergisi Seri A-Yerbilimleri, 15, 87-100.

  • Flanagan, F. J., 1976. Descriptions and analyses of eight new USGS rock standarts, In Twenty-eight papers present analytical data on new and previously described whole rock standarts: USGS Prof. Paper, (ed. by F.J.Flanagan), 840, 171-172.

  • Fuji, N., Kayabah, İ. and Saka, A.H., 1995. Data book of ceramic raw materials of selected areas in Turkey. MTA Monography Series No. 1, 144 p.

  • Gençoğlu, H., Bayhan, H. ve Yalçın, H., 1989. Bilecik-Söğüt yöresi kaolin yataklarının mineralojisi ve kökeni. IV. Ulusal Kil Sempozyumu, C.Ü. Sivas, 20-23 Eylül, Bildiriler Kitabı (Eds. D.Boztuğ ve H.Yalçın), 97-112.

  • Govindaraju, K., 1989. 1989 compilation of working values and sample description for 272 geostandarts. Geostandarts Newsletter, 13, 1-113.

  • Gökten, E., 1983. Şarkışla (Sivas ) güney-güneydoğusunun stratigrafisi ve jeolojik evrimi. Türkiye Jeoloji Kurumu Bülteni, 26, 167- 176.

  • Gökten, 1993. Yıldızeli (Sivas) güneyinde Akdağ metamorfitleri ve örtü kayalarının stratigrafisi ve tektoniği. Türkiye Jeoloji Bülteni, 36, 83-93.

  • Gromet, L.P., Dymek, R.F., Haskin, L.A. and Korotev, R.L.,1984. The

  • Gündoğdu, M.N., Yalçın, H., Temel, A. and Clauer, N., 1996. Geological, mineralogical and geochemical characteristics of zeolite deposits associated with borates in the Bigadiç, Emet and Kırka Neogene lacustrine basins, Western Turkey. Mineralîum Deposita, 31, 492-513.

  • Haskin, L.A., Haskin,M.A., Frey, F.A. and Wildeman, T.R.,1968. Relative and absolute terrestrial abundances of the rare earths. In : Origin and Distribution of the Elements, L.H.Ahrens (ed.). Pergamon Press, p.889-912.

  • Karakaya, N. ve Karakaya, M.Ç., 2001. Şaplıca (Şebinkarahisar, Giresun) volkanitlerinin hidrotermal alterasyon türlerinin mineralojik ve jeokimyasal özellikleri. Türkiye Jeoloji Bülteni, 44, 75-89.

  • Keller, W.D., 1976. Scan electron micrographs of kaolins collected from diverse environments of origin-I. Clays and Clay Minerals, 24, 107-113.

  • Keller, W.D., 1978. Classification of kaolins examplified by their textures in scan electron micrographs, Clays and Clay Minerals, 26, 1-20.

  • Kurtman, R, 1973. Sivas-Hafık-Zara ve İmranlı bölgesinin jeolojik ve tektonik yapısı. MTA Dergisi, 80, 1-32.

  • Moore D.M. and Reynolds R.C., 1997. X-ray Diffraction and the Identification and Analysis of Clay Minerals. Oxford Univ. Press, Oxford, 378 p.

  • Özcan, A., Erkan, A., Keskin, A., Oral, A., Özer, S., Sümengen, M. ve Tekeli, O., 1980. Kuzey Anadolu Fayı-Kırşehir Masifi arasının temel jeolojisi. MTA Derleme Raporu, No.6722, Ankara (yayımlanmamış).

  • Streckeisen, A., 1978. Classification and nomenclature of volcanic rocks, lamprophyres, carbonatites and melilitic rocks. IUGS Subcommission on the Systematics of Igneous Rocks. Recommendations and Suggestions. Neues Jahrbuch für Mineralogie. Stutgart. Abhandlungen, 31, 1-14.

  • Tatar, Y, 1977. Ofiyolitli Çamlıbel (Yıldızeli) bölgesinin stratigrafisi ve petrografisi. MTA Dergisi, 88, 56-72.

  • Tütüncü, K. ve Aktimur, H.T.,` 1988. 1:100.000 ölçekli açınsama nitelikli Türkiye Jeoloji Haritaları Serisi, Divriği-F25 paftası, MTA Yayını, Ankara.

  • Weaver, C.E. and Pollard, L.D., 1973, The Chemistry of Clay Minerals. Developments in Sedimentology 15, Elsevier Sci. Publ. Co., Am sterdam, 213 pp.

  • Yalçın, H., 1991. Hidrotermal kaolinitlerin morfolojisi ve kimyası : Eskişehir ve Malatya yörelerinden örnekler. V. Ulusal Kil Sempozyumu, Anadolu Üniversitesi, Eskişehir, 16-20 Eylül, Bildiriler Kitabı (Ed. M.Zor), 74-86.

  • Yalçın, H., 1997. Eosen yaşlı denizaltı volkanizması ile ilişkili İç Kuzey Anadolu zeolit oluşumları. C.Ü. Mühendislik Fakültesi Dergisi Seri A-Yerbilimleri, 14,43-56.

  • Yalçın, H. ve Bozkaya, Ö., 2001. Sivas havzası (güney kesimi) talk oluşumlarının mineralojisi ve kökeni. 10. Ulusal Kil Sempozyumu, Selçuk Üniversitesi, Konya, 19-23 Eylül, Bildiriler Kitabı, 314-326.

  • Yalçın, H., Bozkaya, Ö., 2002. Hekimhan (Malatya) çevresindeki Üst Kretase yaşlı volkaniklerin alterasyon mineralojisi ve jeokimyası : denizsuyukayaç etkileşimine bir örnek. C.Ü.Müh. Fakültesi Dergisi Seri A-Yerbilimleri, 19, 81-98.

  • Yalçın, H., Karayiğit, A.İ., Cicioğlu, E. ve Gümüşer, G., 1997. Eosen yaşlı Sorgun kömür havzasının kil mineralojisi ve tümkayaç jeokimyası arasındaki ilişkiler. VIII. Ulusal Kil Sempozyumu, Dumlupmar Üniversitesi, Kütahya, 24-27 Eylül, Bildiriler Kitabı (Ed.l.Işık), 15-24.

  • Yeniyol, M., 1983, Trakya ve Kuzeybatı Anadolu kil yataklarının mineralojisi ve endüstriyel değerlendirmeleri. TÜBİTAK, Proje No. TBAG-498, 103 s.

  • Yılmaz, A., 1981a. Tokat ile Sivas arasındaki bölgede ofîyolitli karışığın iç yapısı ve yerleşme yaşı. Türkiye Jeoloji Kurumu Bülteni, 24, 31-38.

  • Yılmaz, A., 1981b. Tokat ile Sivas arasındaki bölgede bazı volkanitlerin petrokimyasal özellikleri. Türkiye Jeoloji Kurumu Bülteni, 24, 51-58.

  • Yılmaz, A., 1983. Tokat (Dumanlıdağ) ile Sivas (Çeltekdağı) dolaylarının temel jeoloji özellikleri ve ofiyolitli karışığın konumu. MTA Dergisi, 99-100, 1-18.

  • Yılmaz, A., Uysal, Ş., Bedi, Y, Yusufoğlu, H.,Havzoğlu, T, Ağan, A., Göç, D. ve Aydın, N., 1995. Akdağ Masifi ve dolayının jeolojisi. MTA Dergisi, 117, 125-138.

  • Yılmaz, A., Uysal, Ş., Bedi, Y, Eşref, A., Yusufoğlu, H., Havzoğiu, T. ve Aydın, N., 1997. 1:100 000 ölçekli açınsama nitelikli Türkiye Jeoloji Haritaları No.46 Sivas-F22 Paftası. MTA Jeoloji Etüdleri Dairesi, Ankara, 14 s.

  • Yalçın, H , Bozkaya, Ö . (2003). Sivas Batısındaki (Yıldızeli-Akdağmadeni) Hidrotermal Kaolin ve I-S Oluşumlarının Mineralojisi ve Jeokimyası . Türkiye Jeoloji Bülteni , 46 (2) , 1-24 . Retrieved from https://dergipark.org.tr/tr/pub/tjb/issue/47034/591095

  • Modal and Fades Analysis of the Elmedin Hill Reef and Kızılkaya Hill Reef Complex (Mut-Mersin)
    Murat Gül Muhsin Eren Kemal Gürbüz
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    Abstract: This study comprises of modal and petrographical results of Elmedin hill reef and Kızılkaya hill reefcomplex that are situated approximately 4-5 km northeast of Mut town (Mersin). In the Mut basin, Mut formation, that contains reef limestone (Middle Miocene) has a lateral and vertical gradational contact with Köşelediformation which includes claystone-marl-clayey limestone alternation and deposited in among the reefs and relatively deeper region in the basin. The Mut formation unconformably overlies the Late Cretaceous limestone andBurdigalian aged Derinçay formation that contains fluvial and limnic deposits and Aqutanian-BurdigalianFakırca formation which contain limnic deposits.As a result of petrographical studies, three fades are distinguished in Kızılkaya hill reef complex andElmedin hill reef and surrounding sediments. According to modal analysis results, micrit: 60.4 %; sparit: 4.1 %;frame forming organisms: 18.7 %; intraclast: 5.3 %; other constituents: 11.5 % in average volume are found inthe base fades (wackestone-packstone). In reef core fades; in bindstone-framestone subfacies micrit: 26,4 %;sparit: 18.4 %; frame forming organisms: 43.5 %; intraclast: 3.5 %: other constituents: 8.1 %; in wackestonepackstone subfacies micrit: 48.8 %; sparit: 12.2 %; frame forming organism: 5.7 %; intraclast: 12.3 %; otherconstituents: 21.1 % are found. In sealing fades (wackestone-packstone) micrit: 54.8 %; sparit: 7.5 %; frameforming organism: 16.8 %; intraclast: 7.3 %; other constituents: 13.7 % are determined.Ratio of frame forming organisms (coral+red alga+bryozoa) were constant during the stable sea leveland suitable environmental condition. When high stand sea level; ratio of frame forming organism was relatively decreased, binding materials was increasing. Other constituents and depend on an effect of sea wave intraclastwere reach to significant ratio.

  • Reef

  • Middle Miocene

  • Mut Basin

  • Carbonate Microfacies


  • Akarsu İ., 1960, Mut Bölgenin jeolojisi, MTA Dergisi, S. 54,36-45.

  • Atabey E., 1999, Mut Havzasında Orta Miyosen karbonat yığışımlarının litofasiyes özellikleri ve evrimi, Orta Toroslar, 52. Türkiye Jeoloji Kurultayı Bildiriler Kitabı, 295-309.

  • Atabey, E., Atabey, N., İslamoğlu, Y., Saraç, G., Günay, E., Sözeri, Ş., Hakyemez, A., Özçelik N. ve Babayiğit, S., 2000. Mut (İçel) - Karaman arası Miyosen litostratigrafısi - kronostratigrafisi ve istif stratigrafık yorumu, MTA Jeoloji Etüdleri Dairesi Başkanlığı Derleme Rapor No: 10312, Ankara, 164s

  • Dunham, R. J., 1962, Classification of carbonate rocks according to depositional texture, W. G. Ham (ed.), Classification of Carbonate Rocks, Mem.AAPG, 1, 108-121.

  • Duran, O. ve Şengündüz, N., 1993, Karbonat kayaları ve rezervuar özellikleri, TPAO Ar. Mer. Gr. Baş. Eğ. Yay. No:24, Ankara.

  • Embry, A. F. and Klovan, J. E., 1971, A Late Devonian reef tract on Northeastern Banks Island

  • Esteban, ML, 1979/1980, Significance of the Upper Miocene coral reefs of the Western Mediterranean, Palaeogeography, Palaeoclimatology, Palaeoecology, 29:169-188.

  • Gedik, İ., Birgili, Ş., Yılmaz, H. ve Yoldaş, R., 1979, Mut-Ermenek-Silifke yöresinin jeolojisi ve petrol olanakları

  • Gökten E., 1976, Silifke yöresinin temel kaya birimleri ve Miyosen stratigrafisi, TJK Bülteni, C. 19, 117-126.

  • Gürbüz, K. ve Uçar, L., 1999, Mut Baseni Miyosen yaşlı resifal kireçtaşlarının jeolojisi, Çukurova Üniversitesi Yerbilimleri (Geosound) Dergisi, 33, 129-140.

  • Hayward A. B., 1984, Sedimentation and basin formation related to ophiolite nappe emplacement, Miocene, SW Turkey, Sedimentary Geology, 40, 105-129.

  • Hayward, A. B. Robertson, A. H. F. and Scoffin, T. P., 1992, Miocene patch reefs from a Mediterranean marginal terrigenous setting in SW Turkey, SEPM Concept Sed. Pal. 5.

  • İslamoğlu. Y. ve Atabey, E., 1999, Mut Havzası (Orta Toroslar) karbonat çökellerinde saptanan mollusk faunasının paleoekolojik ve paleoortamsal özellikleri, 52. Türkiye Jeoloji Kurultayı Bildiriler Kitabı, 334,340.

  • Martin J. M., Braga, J. C. and Riding, R., 1997, Late Miocene Halimeda algal microbial segment reefs in the marginal Mediterranean Sorbas Basin, Spain, Sedimentology, 44(3): 441-456.

  • Okhravi R. and Amini A., 1998, An example of mixed carbonate-pyroclastic sedimentation (Miocene, Central Basin, Iran), Sedimentary Geology, 118:37-54.

  • Özdoğan M. ve Şahbaz A., 1999, Transgresif set - ada lagüner sistem içinde yıkanmış bir yelpaze deltanın gelişimi ve fasiyes özellikleri (Miyosen, Mut Havzası, Türkiye güneyi), Yerbilimleri, 21, 143-159.

  • Şafak, Ü. ve Gökçen, N., 1991, Planktik foraminifer zonlanmasına Doğu Akdeniz provensinden bir örnek: Mut Havzası Tersiyer istifi, TJK Bülteni, 22, 27-35.

  • Tanar, Ü., 1989, Mut Havzası Tersiyer istifinin stratigrafık ve mikropaleontolojik (ostrakod ve foraminifer) incelemesi, Doktora Tezi, Çukurova Üniversitesi Fen Bilimleri Enstitüsü, Adana, 199 s. (Yayınlanmamış).

  • Tanar, Ü. ve Gökçen, N., 1990, Mut-Ermenek Tersiyer istifinin stratigrafisi ve mikropaleontolojisi, MTA Der. 110: 175-180.

  • Tuzcu, S. ve Karabıyıkoğlu, M., 1991, Resifler genel karakterleri, fasiyesleri, evrimi ve ekonomik önemi. Jeoloji Mühendisliği, 38: 5-38.

  • http://www.soest.hawaii.edu.mooreggl03class_22p df.pdf, Geology of the Hawaai island, 9 April 2002.

  • http://www.rac-spa.org.tn/SPA/Italy/TOSCANO.htm

  • http://www.calacademy.org/research/izg/CORAL% 20REEFS.htm

  • ül, M , Eren, M , Gürbüz, K . (2003). Elmedin Tepe Resifi ve Kızılkaya Tepe Resif Kompleksinin (Mut- Mersin) Modal ve Fasiyes Analizi . Türkiye Jeoloji Bülteni , 46 (2) , 25-38 . Retrieved from https://dergipark.org.tr/tr/pub/tjb/issue/47034/591116

  • Geology, Petrography and Geochemistry of the Subduction Related Volcanic Rocks, West of Konya, Central Anatolia
    Hüseyin Kurt Ali Müjdat Özkan Kerim Koçak
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    Abstract: 1 he northwest of Konya is covered by Neogene volcanic breccias, agglomerates, tuffites, tuffs and lavasof andesite, dacite and basaltic andesite. The basaltic andesites contain about 7-10% of olivine, 3-5 % clinopyroxene, 5-10 % orthopyroxene, 60-70 % plagioclase and 5-10 % opaque minerals while the andesitic lavasinclude 50-60 % plagioclase, 10-15 % hornblende, 5% biotite, 2 %, clinopyroxene, 1 % sanidine, 1 % quartz and3 % opaque minerals. Main constituents in the dacitic rocks are plagioclase (35-40%), quartz (10-15 %), hornblende (15-20 %), biotite (10-12 %), opaque minerals (2-3%) and sanidine (3 %). The plagioclase in dacites andandesitic rocks have oscillatory zoning and sieve texture .The volcanic rocks range in composition from basaltic andesites to dacites with calc-alkaline character.Co-variation of major and trace element contents suggest fractional crystallization of hornblende, plagioclase,pyroxene and titaniferous magnetite. The plagioclase fractionation is confirmed by a slight development of negative Eu anomaly. High LREE/HREE and L1LE/ HFSE ratios show that the samples were possibly formed froma subduction-related magma at active continental margin. The strong fractionated and riched REE patterns of therocks indicate that the formation of these rocks may have involved continental crust.

  • calcalkaline

  • subduction

  • Central Anatolia

  • volcanism

  • Neogene


  • Boynton, W. W., 1984. Cosmochemistry of the rare elements. Rare Earth Geochemistry. Elsevier, Amsterdam, 63-107s.

  • Cabanis, B. and Lecolle, M. 1989. Le diagramme La/10,Y/15, Nb/8: un outil pour la discrimination des series volcaniques et la mise en evidence des procussus de melanges et/ ou de contamination crustale. C.R.Acad. Sci.Paris, 309, 2023-2029.

  • Cox, K. J.D. Bell and R.J. Pankhurst 1979. The interpretation of igneous rocks. London: George Allen and Unwin, London, 450 pp.

  • Eren, Y., 1993. Eldes-Gökçeyurt-Derbent-Sögütözü (Konya) Arasinin jeolojisi, Ph.D. Thesis, Selçuk University, Konya, 224 p (Unpublished).

  • Gill, J. B., 1981. Orogenic andesites and Plate tectonics. Springer-Verlag, New York, 370 pp.

  • Harris, N.B.W., Pearce , J.A and Tindle, A.G., 1986. Geochemical characteristics of collision zone magmatism. In. Coward, M.p 6 Ries, A. C. (eds) Collision Tectonics. Geol . Soc. London Spec. Publ., 19,67-81.

  • Hollister, L.S. and Gancarz. A. J., 1971. Compositional sector-zoning in clinopyroxene from the Narce area, Italy. Am. Miner., 56, 959-79.

  • Irvine, T. N. and Baragar, W. R. A. 1971. A guide to the chemical classification of the common volcanic rocks. Can. J.of Earth Sci., 8, 523-548.

  • Keller, J., Junk, D., Burgath, K. and Wolff, F., 1977. Geologie und petrologie des neogenen kalkalkali vulkanismus von Konya (Erenler Dağ- Alaca DağMassiv, Zentral- anatolien). Geol. Jb., B25, 37- 117,Hannover.

  • Kurt, H., 1994. Petrography and Geochemistry of Kadınhanı (Konya) area, Central Turkey. PhD., Glasgow, University (Unpuplished), U.K., 191.

  • Kurt, H., 1996. Evolution of the Kadınhanı (Konya) dacite rocks; petrographical and geochemical evidences for crystal fractionation and possible magma mixing. Geosound, 28, 23-33.

  • Leat, P.T., Jackson, S.E., Thorpe, R.S.and Stillman, C.J.I986. Geochemistry of bimodal basalt subalkaline/peralkaline rhyolite provinences within the southern British Caledonides. J. Geoi. Soc. London, 143,259-276.

  • Nakamura, N., 1973. Origin of sector-zoning in igneous clinopyroxenes. Am. Min., 58, 986-990.

  • Özcan, A., Göncüoğlu, M.C., Turhan, N., Şentürk,K., Uysal, Ş. Ve Işık, A., 1990: Konya - Kadınhanı-Ilgm dolayının temel jeolojisi, MTA, Rap.No: 9535 (yayınlanmamış), Ankara.

  • Özkan, A. M., 1998. Konya batısındaki Neojen çökellerinin stratigrafisi ve sedimantolojisi, Doktora tezi, Selçuk Üniversitesi, Konya, 228 p (yayınlanmamış).

  • Pearce, J. A., 1983. Role of the sub-continental lithosphere in magma genesis at active continental margins. In:Hawkesworth C. J. (eds), Continental basalts and mantle xenoliths.-Shiva, Nantwich, 230- 249pp.

  • Pearce, J.A., Gorman, B.E. and Birkett, T.C., 1977. The relationship between major element chemistry and tectonic environment of basic and intermediate volcanic rocks. Earth Planet Scie. Let., 36., 121-132.

  • Pearce, J.A.,1982. Trace element characteristics of lavas from destructive plate boundaries. ln:Thorpe,R.S.(eds) Andesites: Orogenic andesites and related rocks. Wiley, Chichester, 525-548pp.

  • Sun, S.S. 1980. Lead isotope study of young volcanic rocks from mid-ocean ridges, ocean islands and island arcs, Phil. Trans. R. Soc. London., A297, 409-455.

  • Taylor, Y.and McLennan, S.M. 1985. The continental crust: Its Composition and Evolution. Blackwell, Oxford, 312p.

  • Temel, A., Gündoğdu, M. N., and, Gourgaud,A., 1998, Petrological and geochemical characteristics of Cenozoic high-K calc-alkaline volcanism in Konya, Central Anatolia, Turkey, Journal of Vole, and Geothermal Res., 85, Issues 1-4, p 327-354.

  • Tsuchiyama, A., 1985. Dissolution kinetics of plagioclase in melt of the system diopsite-albite-anorthite and the origin of dusty plagioclase in andesites. Contrib. Mineral. Petrol., 84, 1-16.

  • Villemant, B., Jaffrezic, HL Joron, J.L. and Treuil, M. 1981. Distribution coefficients of major and trace elements: fractional crystallization in the alkali basalt series of Chaine des Puys (Massif Central, France). Geochim. Cosmochim. Acta, 45, 1997- 2016.

  • Watters, B.R. and Pearce , J.A.I987. Metavolcanic rocks of the La Ronge Domain in the Churchill Province, Saskatchewan:geochemical evidence for a volcanic arc origin. Geological Society Special Publication, 33, 167-182.

  • Winchester J. A. and Floyd P. A., 1977. Geochemical distributions of different magma series and their differentiation products using immobile elements, Chem. Geo., 20, 325-343.

  • Wood, D. A., Joron, J.L., Treuil M., Norry M. and Tamey J., 1979 a. Elemental and Sr isotope variations in basic lavas from Iceland and the surrounding ocean floor. Contrib. Mineral. Petrol., 70, 319- 339.

  • Wood, D.A., joron, J.L. and Treuil, M.1979b. Areappraisal of use of trace elements to classify and discriminate between magma series erupted in different tectonic settings. Earth and planetary Science letters, 46, 326-336.

  • Wood, D.A. 1980. The application of a Th-Hf-Ta diagram to problems of tectonomagnetic classification and to establish the nature of crustal contamination of basaltic lavas of the British Tertiary volcanic provence. Earth and Planetary Science Letters, 50, 11-30.

  • Kurt, H , Özkan, A , Koçak, K . (2003). Geology, Petrography and Geochemistry of the Subduction Related Volcanic Rocks, West of Konya, Central Anatolia . Türkiye Jeoloji Bülteni , 46 (2) , 39-52 . Retrieved from https://dergipark.org.tr/tr/pub/tjb/issue/47034/591210

  • Metamorphic Evolution of Yeniköy Melange (S W Thrace)
    Kenan Erol
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    Abstract: Yeniköy Melange constituting the basement in southwest Thrace, is formed by various rock blocks metamorphised in blueschist and greenschist fades conditions. The main constitues of metamorphic rocks are glaucophane-lawsoniteschist, tremolite/actinolitefels, epidote-chloriteschist and serpentinites. Morover there existmetabasite, metachert, weakly recrystallized limestone and various volcanic rock blocks. This units is in the formsof tectonic melange and its age is Upper Cretaceous. The melange has limited amount of matrix material and ismainly build up of rock blocks. Yeniköy Melange is derived from basic origin magmatic rocks, under burial metamorphism conditions, resulted from subduction ofTntra-Pontide Ocean crust under the continental crust, whichis situated between Rodop-Pontide and Sakarya continents. During the Alpine orogeny two different metamorphic phase were effected the Yeniköy Melange. Firstly, the rock undergone high pressure/low temperature(HP/LT) metamorphism with blueschist fades (Ml) conditions. At the first metamorphic stage, the glaucophaneand lawsonite minerals were derived from metabasites. However in the M2 phase, the rocks types have experienced typical greenschist fades conditions. The minerals of this metamorphic stage are, chlorite, epidote, actinolite and albite. As a result of greenschist fades metamorphism, blueschist minerals, such as glaucophane rimmed by actinolite and lawsonite were partly replaced by epidote. For the HP/LT metamorphism (Ml),we can estimate a 6 to 10 kbars pressure and 250-400 oC temperature values. Nevertheles, in M2 phase wecould estimate 4-6 kbars pressure and 350-450 oC temperatures. In this way the mineral assemblageobserved rocks and their textural features of the Yeniköy Melange may indicate a polymetamorphic evolution in the PTt path. Likewise, the greenschist fades metamorphism partly overprints the blueschist metamorphism.

  • metamorphism

  • blueschist fades

  • greenschist fades

  • Yeniköy Melange

  • SW Thrace


  • Alaygut, D., 1996, Trakya Havzası`nın Temelindeki Kristalin Kayaların Mineralojik-Petrografik İncelenmesi: TPAO Rapor No: 2140.

  • Bucher, K. and Frey, M., 1994, Petrogenesis of Metamorphic Rocks: Springer-Verlag, 6th Edition, Complete Revision of Winkler`s Textbook, Germany, 318 p.

  • Chen, G., Okrusch, M. and Sauerschell, W., 1997, Polymetamorphic Evolution of high-pressure rocks on Samos, Greece: International Earth Sciences on the Aegean Region, 9-14 October 1995, Proceedings Volume-II, (eds: Pişkin, Ö., Ergün, M., Savaşçın, M.Y. and Tarcan, G), İzmir, Türkiye.

  • Erol, K., 2001, Şarköy Kuzeyi-Bolayır Arasındaki (GB Trakya) Metamorfitlerin Mineralojik ve Petrografik İncelenmesi: Hacettepe Üniversitesi, Yüksek Mühendislik Tezi, 83 sayfa, Ankara (yayınlanmamış).

  • Evans, B.W., 1990, Phase relations of epidoteblueschists: Lithos 25, pp. 3-23.

  • Heinrich, W. and Althaus, E., 1988, Experimental determination of the reaction 41awsonite + albite = paragonite + 2zoisite + 2quartz + 6H2O and 41awsonite + jadeite - paragonite + 2zoisite + qufatz + 6H2O. Neues Jahrb. Mineral. Monatsh., pp. 516- 528.

  • Okay, A.I., 1984, Distribution and characteristics of the north-west Turkish blueschists. In: The Geological Evolution of the Eastern Mediterranean (eds. Robertson, A.H.F. and Dixon, J.E.), Geol. Soc. London Spe. Pub. 17, pp. 455-466.

  • Okay, A.I., 1986, High-pressure/low-temperature metamorphic rocks of Turkey. In: Blueschist and Eclogites (Eds. Evans, B.W. & Brown, E.H), Geological Society of America Memoir, 164, pp. 333-347.

  • Okay, A.I., 1989, Alpine-Himalayan Blueschists: Ann. Rev. Earth Planet Sci. 17, pp. 55-87.

  • Özbek, O. et Erol, K., 2001, Etude petrographique des haches polies du Hamaylıtarla et Fenerkaradutlar (Turquie): Anatolia Antiqua IX, De Boccard, Paris.

  • Raymond, L.A., 1984, Classification of melanges: In: Raymond, L.A. (ed), Melanges: their nature, ori gin and significance. Geol. Soc. of America, Special Paper, 198.

  • Şengör, A.M.C. and Yılmaz, Y, 1981, Tethyan evolution of Turkey: a plate tectonic approach: Tectonophysics, 75, pp. 181-242.

  • Şentürk, K. ve Okay, A.İ., 1984, Saros Körfezi doğusunda yüksek basınç metamorfızması: MTA Dergisi, 97/98, pp. 152-155.

  • Şentürk, K., Sümengen, M., Terlemez, İ. and Karaköse, C, 1998, 1/100.000 ölçekli açınsama nitelikli Türkiye Jeoloji Haritaları, No. 63 ve 64, Bandırma D3 ve D4 Paftaları: MTA Genel Müdürlüğü, Jeoloji Etütleri Dairesi, Ankara.

  • Terabayashi, M. and Maruyama, S., 1998, Large pressure gap between the Coastal and Central Franciscan belts, northern and central California: Tectonophysics, V. 285, (1/2), pp. 87-101.

  • Van Der Maar, P.A., 1980, The geology and petrology of Ios Cyclades, Greece: Annales Geologiques Des Pays Helleniques, XXX/1, pp. 206-224, Athenes.

  • Winkler, H.G.F., 1979, Petrogenesis of metamorphic rocks: Fifth Editions, Springer- Verlag, 348 p.

  • Erol, K . (2003). Yeniköy Karışığının (GB Trakya) Metamorfik Evrimi . Türkiye Jeoloji Bülteni , 46 (2) , 53-61 . Retrieved from https://dergipark.org.tr/tr/pub/tjb/issue/47034/591231

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