GEOLOGY AND PETROLOGY OF THE KIZILDAĞ OPHIOLITE (HATAY)

Yıl 1986, Cilt: 107 Sayı: 107, 24 - 40, 01.12.1986

Orhan Tekeli Murat Erendil

Öz

In the south of Amanos mountains, a continuous ophiolite succession, the Kızıldağ ophiolite, is
exposed from tectonite peridotites, through layered and isotropic gabbros to the sheeted dike complex and pillowed volcanics.
The tectonites are composed mostly of harzburgites with minor dunite. The plutonic section comprises a layered
gabbroic sequence of mainly wehrlite-gabbro alternations (cpx-ol and ol-cpx-pl cumulates) with minor dunite and Iherzolite,
planar laminated nonlayered gabbro (chiefly ol-cpx-pl cumulates) section, an isotropic gabbro section of massive
noncumulus hb-px-gabbros with plagiogranite bodies. Therefore, the plutonic sequence with minor ultramafic cumulates
differs from that of the other Tauric ophiolites. The sequence also shows drastic lateral thickness and lithological differences.
The sheeted dike complex is well developed and its internal structure indicates that additional spreading axes were
active during the spreading process. The volcanics are composed of pillowed and massive basaltic lava flows. Cumulates
show a limited cryptic variation without any considerable cryptic evolution indicating repeated primitive liquid replenishment
of the magma chamber. Chemically the tholeiites of the dike and volcanic complexes are transitional between
island arc and mid-ocean ridge basalts and are highly depleted in incompatible elements. Thus the Kızıldağ ophiolite is
proposed to represent a kind of oceanic lithosphere produced in a slow spreading center with multiple small magma
chambers developed over an already depleted mantle. 

Anahtar Kelimeler

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Kaynakça

• Aslaner, M., 1973, iskenderun-Kırıkhan bölgesindeki ofiyolitlerin jeoloji ve petrografisi: MTA Yayl., 150, 78 s., Ankara.
• Atan, O. R., 1969, Eğribucak-Karacaören (Hassa)-Ceylanlı-Dazevleri (Kırıkhan) arasındaki Amanos dağlarının jeolojisi: MTA Yayl., 139, 85 s., Ankara.
• Blumenthal, M., 1938, Die Grenzone zvvischen syrischer Tafel und Tauriden in der Gegend des Amanos: Eclog. Geol. Helvet., 31, 381-383. Boudier, F. ve Coleman, R.G., 1981, Cross section through the peridotite in the Samail ophiolite, southeastern Oman mountains: Jour. Geophys. Res., 86, 2573-2592.
• Coleman, R.G., 1981, Tectonic setting of ophiolite obduction in Oman: Jour. Geophys. Res., 86, 2497-2508.
• Dean, W.T. ve Krummenacher, R., 1961, Cambrian Trilobites from the Amanos mountains, Turkey: Paleontology, 4/1, 71-81.
• ve Monod, O., 1985, A new interpretation of the Ordovician stratigraphy of Bahçe area (Northern Amanos Mountains, Turkey): Geol. Mag., 122 (1), 15-25.
• Delaloye, M.; Pişkin, Ö.;Voldet, P.; Vuagnat, M. ve Wagner, J., 1979, Rare Earth element concentrations in mafıcs from the Kızıldağ ophiolite (Hatay, Turkey): Schweiz. Min. Pet. Mitt., 59, 67-73.
• -; Selçuk, H.; Vuagnat, M. ve Wagner, J., 1980a, Geological section through the Hatay ophiolite along the Mediterranean Coast, southem Turkey: Ofioliti, 5 (2/3), 205-216.
• ; De Souza, H.; Wagner, J. ve Hedley, L, 1980b, isotopic ages on ophiolites from the eastem Mediterranean: Panayiotou, A. ed., Int. Symp. on Ophiolitesda., 292-295, Lefkoşe.
• Dubertret, L., 1953, Geologie des roches vertes du NW de la Syrie et du Hatay (Turquie): Notes Mem. Moyen Orient, 6, 227 s.
• Erendil, M., 1984, Petrology and structure of the Upper crustal units of the Kızıldağ ophiolite (Turkey): Tekeli, O. ve Göncüoğlu, C. eds., Int. Symp. on the Geology of the Taurus Belt, Proceedings.. 269-284, Ankara.
• Glennie, K.W.; Boeuf, M.G.A.; Hughes-Clarke, M.W.; Moody-Stuart, M.; Pliaar, W.F.H. ve Reinhardt, B.M., 1974, Geology of the Oman Mountains: K. Ned. Geol. Mijnboukd. Genoot. Verh., 37, 423 s.
• Pallister, J.S. ve Hopson, C.A., 1981, Samail ophiolite plutonic süite: Field relations, cryptic cvariation and layering, and a model of a spreading ridge magma chamber: Jour. Geophys. Res., 86, 2593-2644.
• Parrot, J.F. ve Whitechurch, H., 1978, Subductions anterieures au charriage nord-sud de la croute tethysienne: Facteur de metamorphisme de series sedimentaires et volcaniques liees aux assemblages ophiolitiques Syro-Turcs, en schistes verts et amphibolites: Rev. Geogr. Phys. Geol. Dyn., 20, 153-169.
• Pearce, J.A., 1980, Geochemical evidence for the genesis and eruptive setting of lavaş from Tethyan ophiolites: Panayiotou, A. ,ed. Int. Symp. on Ophiolites., 261-272, Lefkoşe.
• Rheid, I. ve Jackson, H.R., 1981, Oceanic spreading rate and crustal thicknesses: Marine Geophys. Res., 5, 165-173.
• Selçuk, H., 1981, Etüde geologique de la partie meridionale du Hatay (Turquie): Doktora tezi (yayımlanmamış), Cenevre Üniv., 116 s.
• Stoneley, R., 1975, On the origins of ophiolite complexes in the southem Tethys region: Tectonophysics, 25, 303-322.
• Wager, L.R. ve Brown, G.M., 1967, Layered igneous rocks: W.H. Freeman, San Francisco