POSSIBLE PAN-AFRICAN METAVOLCANICS IN THE ÖDEMİŞ, SUBMASSIF OF THE MENDERES MASSIF, WESTERN TURKEY

Yıl 1991, Cilt: 112 Sayı: 112, 1 - 16, 01.05.1991

Osman Candan Nejat Kun

Öz

Menderes massif located in the Western Anatolia, in Turkey, is made up of the old crystalline rocks. The last main metamorphism of this massif has been completed during Upper Paleocene - Lower Eocene. The general sequence of the study area which is situated in the Ödemiş submassif of the Menderes massif consists of, in ascending order, basal gneiss complex, blue augen gneiss, leptite (metavolcanic), schist and marble. This metamorphic sequence was cut by the post-metamorphic acidic and basic plutons and covered by the young volcanics. Leptites occuring between gneiss and schist units are the metamorphic equivalents of the dacitic and rhyolitic volcanics. These island arc volcanics have a calc-alkaline kindred. According to the age, geological position and chemical characteristics, these metavolcanics of the Ödemiş submassif may be correlated with the island arc volcanic bell widely exposed in the NE Africa and Arabian Peninsula, in relation to the late phases of the Pan-African orogenesis. 

Anahtar Kelimeler

POSSIBLE, PAN-AFRICAN, METAVOLCANICS

POSSIBLE PAN-AFRICAN METAVOLCANICS IN THE ÖDEMİŞ, SUBMASSIF OF THE MENDERES MASSIF, WESTERN TURKEY

Öz

Menderes massif located in the Western Anatolia, in Turkey, is made up of the old crystalline rocks. The last main metamorphism
of this massif has been completed during Upper Paleocene - Lower Eocene. The general sequence of the study area which is situated
in the Ödemiş submassif of the Menderes massif consists of, in ascending order, basal gneiss complex, blue augen gneiss, leptite (metavolcanic),
schist and marble. This metamorphic sequence was cut by the post-metamorphic acidic and basic plutons and covered by the young
volcanics. Leptites occuring between gneiss and schist units are the metamorphic equivalents of the dacitic and rhyolitic volcanics. These island
arc volcanics have a calc-alkaline kindred. According to the age, geological position and chemical characteristics, these metavolcanics
of the Ödemiş submassif may be correlated with the island arc volcanic bell widely exposed in the NE Africa and Arabian Peninsula, in relation
to the late phases of the Pan-African orogenesis. 

Anahtar Kelimeler

POSSIBLE, PAN-AFRICAN, METAVOLCANICS

Kaynakça

• Andriessen, P.A.; Boerlrijk, N.A.I.M.; Hebeda, E.H.; Priem, H.N.A.; Verdunman, E.A. Th. and Verschure, R.H., 1979, Dating the events of metamorphism and granitic magmatism in the Alpine Orogen of Naxos (Cyclades, Greece): Contrub. Mineral. Petrol., 69, 215-225.
• Çağlayan, M.A.; Öztürk, E.M.; Öztürk, Z.; Sav, H. and Akat, U., 1980, Menderes Masifi güney kanadına ait bulgular ve yapısal yorum: Jeo. Müh. Der., 9-17.
• Dora, O. Ö.; Kun, N. and Candan, O., 1988, Metavolcanics (leptite) in the Menderes Massif: A possible paleoarc volcanism: ODTÜ Melih Tokay Sempozyumu Bull., (in print).
• ——— ; and , 1989, Menderes Masifi'nin metamorfik tarihçesi ve jeotektonik konumu: Ç.Ü. Ahmet Acar Jeoloji Sempozyumu, Bildiri Özetleri Kitapçığı, p. 5.
• Dürr S., 1975, Über alter und geotektonisch stellung des Menderes Kristallins/SW - Anatolien und seine sequivalente in dermittleren Aegaeis: Marburg/Lahn, 107 p.
• Dürr, S.; Alther, R.; Keller, J.; Okrusch, M. and Seidel, E., 1978, Alps, Apennines, Hellenides: Inter-Union Commission on Geodyrmnics Scientific Report No: 38, p. 454-477.
• Gass, G., 1982, Upper Proterozoic (Pan African) calc-alkaline magmatism in north-eastern African and Arabia: In andesite, cd. Thorpe, R.S., John Willay and Sons.
• Glassley, W., 1974, Geochemistry and tectonics of the Crescent volcanic rocks, Olympic peninsula: Geol. Soc. Amer. Bull., 85, 785-794, Washington.
• Goltini, V., 1968, The TiO2 frequency in volcanic rocks: Geol. Rdsch., 168 pp.
• Kistler, R.W. and Evemden, J.F., 1971, Sierra Nevada Plutonics cycle: Part I., origin of composite granitic batholits: Geol. Soc. Amer. Bull., 82, 853-868.
• Konak, N.; Akdeniz, N. and Öztürk, E.M., 1987, Geology of the south of Menderes Massif: IGCP Project No. 5, 42-53, Turkey.
• Kun, N., 1983, Cine dolayının petrografisi ve Menderes Masifinin güney kesimine ait petrolojik bulgular: Doktora tezi, DEÜ, İzmir.
• and Candan, O., 1987, Ödemiş Asmasifindeki leptitlerin dağılımı, konumları ve oluşum koşulları: TBAG-688 number of project, 133 P.
• and , 1988, Menderes Masifindeki Erken Paleozoik yaşlı bazik damar kayaları: Hacettepe Üniversitesi Yerbilimleri Derg. (inprint).
• Löfgren, C., 1979, Do leptites represent Precambrian island arc rocks: Lithos, 12, 159-165.
• Miyashiro, A., 1975, Volcanic rock series and tectonic setting: In annual rewiev of earth and planetary Science, 3, 51-269.
• Morrison, G. W., 1980, Characteristics and tectonic setting of the shoshonite rocks association: Lithos, 13, 97-108.
• Pearce, J.A. and Cann, J.R., 1973, Tectonic setting of basic volcanic rocks determined using trace clement analysis: Earth planet, Sci. Lett 19, 290-300.
• Phillippson, A., 1911, Reisen und forschungen im Westlichen Kleinasien: Petermanns Mitt Erganzonpsheft, 172, Gotha.
• Rittmann, A., 1962, Volcanoues and their activity: John Wiley and Sons, Newyork, London, 305 pp.
• Satır, M. and Friedrichsen, H., 1986, The origin and evolution of the Menderes Massif, W-Turkey: A rubidium/strontium and oxygen isotope study, Geol. Rundschaus 75/3, 703-714.
• Schuiling, R.D., 1962, Türkiye'nin güneybatısındaki Menderes migmatit kompleksinin petrolojisi, yaşı ve yapısı hakkında: MTA Bull. 58, 71-84, Ankara.
• Şengör, M.C.; Saur, M. and Akkök, R., 1984, Timing of tectonic events in the Menderes Massif, Western Turkey: Implication for tectonic evolution and evidence for Pan-African basement in Turkey: Tectonics, Vol. 3, no. 7, 693-707.
• Winchester, J.A. and Floyd, P.A., 1977, Geochemical discrimination products using immobile elements: Chem. Geol. 20, 325-343. Zanettin, B., 1984, Proposed new chemical classification of volcanic rocks: Episodes, 714, 19-20