ULTRABASIC TECTONITES AND LAYERED PERIDOTITES OF THE HATAY AREA (TURKEY)

Yıl 1974, Cilt: 83 Sayı: 83, 185 - 193, 01.12.1974

H.ersen Çoğulu

Öz

In the light of our recent investigations we can distinguish two types of ultramafic rocks in the
Hatay region: ultrabasic tectonites and ultrabasic cumulates. The purpose of this paper is to outline the Origin and the
features of these rocks. Basic and ultrabasic complexes are classified according to their geological setting, mode of formation,
mineralogical composition, structural and textural features, etc.
The Hatay ultramafics belong to the Alpine type of ultrabasic complexes. The tectonites are characterized by the
existence of foliation and lineation. The cumulates show magmatic layering. Both of these rocks are subjected to partial
melting eventually giving rise to the Production of a basic magma. Serpentinization of these ultramafics has taken place
during the Alpine orojenesis.

Anahtar Kelimeler

HATAY AREA, ULTRABASIC TECTONITES, LAYERED PERIDOTITES

HATAY BÖLGESİNDE ULTRABAZİK TEKTONİTLER VE TABAKALI PERİDOTİTLER

Öz

Hatay ilinde yapılan son araştırmalar bölgedeki ultramafiklerin çok kökenli bir kayaç grubundan meydana
geldiklerini ortaya koymuştur. Bazik ve ultrabazik masiflerin genel bir sınıflandırılması yapılmış ve özellikleri mukayese
edilerek Hatay ultramafiklerinin diğer oluşumlar içindeki yeri belirtilmiştir. Kızıldağ masifinin önemli kayaç tipleri,
yapı ve dokuları, kapsadıkları filoniyen kayaçlar incelenmiştir.
Ultrabazik tektonitler yer mantosundan gelmiş ekaylardır. Mineralojik bileşimleri, yapısal ve dokusal özellikleriyle
belirgindirler. Tabakalı peridotitler ise tektonitlerin kısmî ergimesinden oluşan magmanın fraksiyonel kristalleşmesiyle
meydana gelmişlerdir. Serpantinitler, her iki kayaç grubunun Alpin orojenezi sırasında hidratlaşması sonucu oluşmuşlardır.

Anahtar Kelimeler

HATAY BÖLGESİ, ULTRABAZİK, TEKTONİTLER

Kaynakça

• ANTHONIOZ, P.M. (1971): Lesmylonites profondes. Etude qualitative et Comparative du metamorphisme, blastomylonitique. Sci. Terre. t. XVI, pp. 109-155, Nancy. .
• BENSON, W. N. (1926): The tectonic conditions accompanying the intrusion of basic and ultrabasic igneous rocks. Nat. Acad. Sci. Mem. 19. p. 90.
• BORCHERT, H. (1961): Zusammenhange zwischen Lagerstattenbildung, Magmatismus und Geotektonik. Geol. Rundschau, 50, S. 131-165.
• BOUDİER, F. & NİCOLAS, A. (1972): Fusion partielle gabbroique dans la Iherzolite de Lanzo. Bull. Suisse. Min. Petr., 52/1. pp. 39-56.
• BRUNN, J.H. (1954): Les eruptions ophiolitiques dans le Nord-Ouest de la Grece: leurs relations avec l'orogenese. 19. Int. Geol. Cong. Alger, sect. XV, fasc. XVII, pp. 19-27.
• (1960): Mise en place et differentiation de l'association pluto -\olcanique du cortege ophiolitique. Rev. Geogr. Phys. Geol. Dyn., 3. pp. 115-132.
• CHURCH, W.R. (1972): Ophiolite: its definition, origin as oceanic crust, and mode of emplacement in orogenic belts, with special reference to the Appalachians. Publ. Earth-Phys. v. 42, no. 3.
• ÇOĞULU, E. (1973): Hatay-Kızıldağ masifinin oluşumu hakkında yeni buluşlar. Cumhuriyetin 50. yılı Yer Bilimleri Kongresi Tebliğleri, Ankara.
• DEN TEX, E. (1969): Origin of ultramafic rocks, their tectonic setting and history: A contribution to the discussion of the paper «The origin of ultramafic and ultrabasic rocks» by P.J. Wyllie. Tectonophysics, 7. pp. 457-488.
• DE ROEVER, W.P. (1957): Sind die alpinotypen Peridotitmassen vielleicht tektonisch verfrachtete Bruchstücke der Peridotitschale? Geol Rundschau, 46, S. 137-146.
• DEWEY, J.F. & BIRD, J. (1970): Mountain bets and new global tectonics, J. Geoph. Res., 15, pp. 2625-2647.
• DUBERTRET, L. (1955): Geologie des roches vertes du nord-ouest de la Syrie et du Hatay (Turquie). Notes et Mem. sur le Moyen-Orient. Alusee Nat. Hist. Natur. Paris. pp. 5-224.
• GREEN, D.H. & RINGWOOD, A.E. (1967): The stability fields of aluminous pyroxene peridotite and garnet peridotite and their relcvance in upper mantle structure. Earth Planet Sci. Lett. 3, pp. 151-160.
• HESS, H.H. (1971): Mid-oceanic ridges and tectonics of the sea floor. Colston paper 17. Submarine Geol. and Geophys., London, pp. 317-334.
• JACKSON, E.D. (1971): The origin of ultramafic rocks by cumulus processes. Fortschr. Miner., 48, pp. 128-174.
• & THAYER, T.P. (1972): Some Criteria for distinguishing between stratiform, concentric and alpine peridotite-gabbro complexes. Congr. Geol. Int. 24 Sess., Montreal, sect. 2, pp. 289-296.
• MAXWELL, J.C. (1969): «Alpine mafic and ultramafic rocks—the Ophiolite süite: A contribution to the discussion of the paper «The origin of ultrabasic and ultramafic rocks» by P.J. Wyllie. Tectonophysics, 7, pp. 489-494.
• MOORES, E.M. & VINE, F.J. (1971): The Troodos Massif, Cyprus and other ophiolites as oceanic crust: Evaluation and implications Phil. Trans. Roy. Soc. London, 268, pp. 443-466.
• NİCOLAS, A.; BOUCHEZ, J.L.; BOUDİER, F. & MERCİER, J.C. (1971): Textures, structures and fabrics due to solid state flow in some European Iherzolite. Tectonophysics, 12, pp. 55-86.
• & JACKSON, E.D. (1972): Repartition en deux provinces des peridotites des chaines alpines longeant la Mediterranee: implications geotectoniques. Bull. Suisse. Min. Pet., 52/3, pp. 479-495.
• O'HARA, M.J. (1970): Upper Mantle Composition inferred from laboratory experiments. Phys,-Earth Planet inter. 3. pp. 236-245.
• REİNHARDT, B.M. (1969): On thc genesis and emplacement of ophiolites in the Oman Mountains geosycline. Bull Suisse Alin. Petr., 49/1, pp. 1-30.
• RİCOU, L.E. (1971): Le croissant ophiolitique peri-arabe, une ceinture de nappes mises en place au Cretace superieur. Rev. Geol. Phys. Geol. Dyn. 13/4, pp. 327-350.
• ROST, F. (1968): Vergleich der Ultramafitite der Ivrea-Zone mit Petidotiteinschaltungen im europâischen kristallinen Grundgebirge. Schıreiz. Mineral. Petr. Mitt., 48. S. 165-173.
• STEINMAN, N.G. (1927): Die ophiolthischen Zonen in den mediterranean Kettengebirge. 14 th. Intern. Geof. Congr. Madrid 2, S. 638-667.
• SUESS, E. (1909): Das Antilitz der Erde. Vienna, F. Tempsky, S. 789.
• THAYER, T.P, (1960): Some critical differences between alpine-type and stratiform peridotite-gabbro complexes. Intern. Geol. Congr. Sess. 21, pp. 247-259.
• VUAGNAT, M. & ÇOĞULU, E. (1968): Quelques reflcctions sur le massif basique-ultrabasique du Kızıl Dagh. Hatay, Turquie. C.R. See. Phys. Hist. Nat. Geneve, 2. pp. 210-216.
• WYLLIE, P.J. (1969): The origin of ultramafic and ultrabasic rocks. Tectonophysics, 7, pp. 437-457.