NURETDİN KAYMAKCI, Murat İnceöz & Pinar ERTEPINAR

3D-Architecture and Neogene Evolution of the Malatya Basin: Inferences for the Kinematics of the Malatya and Ovacık Fault Zones

The 3D-architecture of the Malatya Basin was studied using remote sensing, seismic interpretation, and palaeostress analysis in the context of the Malatya-Ovacık fault zone. The results indicate that the Ovacık and Malatya fault zones are not different segments of a single 'so called' Malatya-Ovacık fault zone; rather, they are two different fault zones that have operated independently. In addition, the Ovacık fault zone is delimited in the west by the Malatya fault zone, which extends farther north from the point of supposed junction. Maximum individual deflection of streams along the Ovacık fault zone is about 9.3 km, and summation of all stream deflections along different segments of the Ovacık fault zone indicates that sinistral displacement of the Ovacık fault zone has been not more than 20 km following development of the drainage system in the region. Evidence for three different deformation phases were recognized in the Malatya Basin. Deformation phase 1 was characterized by NW-SE-directed extension and operated in the Early to Middle Miocene interval. Deformation phase 2 was characterized by WNW-ESE-directed compression and a vertical s2 which indicates transcurrent tectonics. It operated in the Late Miocene to Middle Pliocene. Deformation phase 3 was characterized by NNE-SSW-directed compression, and vertical stress is interchanged with s2 and s3; this is interpreted as due to near equal magnitudes of these stresses, resulting in stress permutation and interchange of intermediate and minor stress. Deformation phase 3 commenced in the Late Pliocene and has been active since then. The infill of the Malatya Basin has wedge-like geometry in E-W and N-S directions and the basin fed detritus mainly from its eastern margin. During field studies in the basin, a number of inverted normal faults were encountered; these apparently developed as growth faults in the Early to Middle Miocene time interval and then were reactivated or inverted during post-Middle Miocene compressional phases.

Anahtar Kelimeler:

Malatya Basin, Malatya fault zone, Ovacık fault zone, palaeostress, reactivation, inversion

3D-Architecture and Neogene Evolution of the Malatya Basin: Inferences for the Kinematics of the Malatya and Ovacık Fault Zones

Keywords:

Malatya Basin, Malatya fault zone, Ovacık fault zone, palaeostress, reactivation, inversion,

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AKTAfl¸ G. & ROBERTSONA.H.F. 1984. The Maden complex, SE Turkey: evolution of a Neotethyan active margin. In: DIXONJ.E. & ROBERTSON, A.H.F. (eds), The Geological Evolution of the Eastern Mediterranean. Geological Society, London, Special Publications 17, 375–402.
AKTİMUR, S. 1979. Malatya-Sivas Dolayının Uzaktan Algılama Yöntemi ile Çizgiselliklerinin İncelenmesi [The Lineament Analysis of Malatya- Sivas Region Using Remote Sensing]. MTA Report No. 6651 [unpublished].
ANGELIER, J. 1988. Tector: Determination of Stress Tensor Using Fault Slip Data Set. Quantitative Tectonics, University Pierre and Marie Curie, Paris.
ANGELIER, J. 1994. Fault slip analysis and palaeostress reconstruction. In: HANCOCK, P.L. (ed), Continental Deformation. Pergamon Press, Oxford, 53–100.
ARGER, J., MITCHELLJ. & WESTAWAY, R. 2000. Neogene and Quaternary volcanism of south-eastern Turkey. In: BOZKURT, E., WINCHESTER, J.A., PIPER, J.D.A. (eds), Tectonics and Magmatism, in Turkey and the Surrounding Area. Geological Society, London, Special Publications 173, 459–487.
ARPAT, E. & fiARO⁄LU, F. 1975. Türkiye’deki bazı önemli genç tektonik olaylar [Some recent tectonic events in Turkey]. Türkiye Jeoloji Kurumu Bülteni 18, 91–101.
BİNGÖL, A.F. 1984. Geology of the Elazığ area in the eastern Taurus region. In: TEKELİ, O. & GÖNCÜO⁄LU, M. (eds), Geology of the Taurus Belt. Mineral Research and Exploration Institute (MTA) Publication, Ankara, Turkey, 209–216.
CHOROWICZ, J., LUXEY, P., LYBERIS, N., CARVALHO, J., PARROT, J.-F., YÜRÜR, T. & GÜNDO⁄DU, M.N. 1994. The Maras Triple Junction (southern Turkey) based on digital elevation model and satellite imagery interpretation. Journal of Geophysical Research 99/B10, 20225–20242.
DEWEY, J.F., HEMPTON, M.R., KIDD, W.S.F., fiARO⁄LU, F. & fiENGÖR, A.M.C. 1986. Shortening of continental lithosphere: the neotectonics of Eastern Anatolia – a young collisional zone. In: COWARD, M.P. & RIES, A.C. (eds), Collision Tectonics. Geological Society, London, Special Publications 19, 3–36.
GENÇALİO⁄LU-KUflCU, G., GÖNCÜO⁄LU, M.C. & KUflÇU, İ. 2001. Post- collisional magmatism on the northern margin of the Taurides and its geological implications: geology and petrology of the Yahyalı- Karamadazı granitoid. Turkish Journal of Earth Sciences 10, 103–119.
GÖRÜR, N., OKTAY, F.Y., SEYMEN, İ. & fiENGÖR, A.M.C. 1984. Palaeotectonic evolution of the Tuzgölü basin complex, central Turkey: sedimentary record of a Neotethyan closure. In: DIXON, J.E. & ROBERTSON, A.H.F. (eds), The Geological Evolution of the Eastern Mediterranean. Geological Society, London, Special Publications 17, 77–112.
HARDCASTLE, K.C. & HILLS, L.S. 1991. Brute3 and Select: QuickBasic 4 programs for determination of stress tensor configurations and separation of heterogeneous populations of fault-slip data. Computers and Geosciences 17, 23–43.
HILGEN, F. J., ABDUL-AZIZ, H., KRIJGSMAN, W., LANGEREIS, C.G., LOURENS, L.J., MEULENKAMP, J.E., RAFFI, I., STEENBRINK, J., TURCO, E., VAN VUGT, N., WIJBRANS, J. R. & ZACHARIASSE, W.J. 1999. Present status of the astronomical (polarity) time-scale for the Mediterranean Late Neogene. Philosophical Transactions Royal Society London A 357, 1931–1947.
HOMBERG, C., HU, J.C., ANGELIER, J., BERGERAT, F. & LACOMBE, O. 1997. Characterization of stress perturbation near major fault zones: insights from 2-D distinct-element numerical modeling and field studies (Jura Mountains). Journal of Structural Geology 19, 703–718.
JAFFEY, N. & ROBERTSON, A.H.F. 2004. Non-marine sedimentation associated with Oligocene–Recent exhumation of the Central Taurus Mountains, S. Turkey. Sedimentary Geology 173, 53–89.
KAYMAKCI, N. 2000. Tectono-stratigraphical Evolution of the Çankiri Basin (Central Anatolia, Turkey). PhD Thesis, Geologica Ultraiectina. No. 190, Utrecht University Faculty of Earth Sciences, The Netherlands, ISBN 90-5744-047-4.
KAYMAKCI, N., WHITE, S.H. & VANDIJKP.M. 2000. Palaeostress inversion in a multiphase deformed area: kinematic and structural evolution of the Çankırı Basin (central Turkey), Part 1. In: BOZKURT, E., WINCHESTER, J.A. & PIPER, J.A.D. (eds), Tectonics and Magmatism in Turkey and the Surrounding area. Geological Society London Special Publication 173, 445–473.
KAYMAKCI, N., DUERMEIJER, C.E., LANGEREIS, C., WHITE, S.H. & VANDIJK, P.M. 2003b. Oroclinal bending due to indentation: a paleomagnetic study for the early Tertiary evolution of the Çankiri Basin (central Anatolia, Turkey). Geological Magazine 140, 343–355.
KAYMAKCI, N., WHITE, S.H. & VANDIJKP.M. 2003a. Kinematic and structural development of the Çankırı Basin (central Anatolia, Turkey): a palaeostress inversion study. Tectonophysics 85–113. 364,
KOÇYİ⁄İT, A. & ALTıNER, D. 2002. Tectonostratigraphic evolution of the North Anatolian palaeorift (NAPR): Hettangian-Aptian passive continental margin of the northern Neo-Tethys, Turkey. Turkish Journal of Earth Sciences 11, 169–191.
KOÇYİ⁄İT, A. 1991. An axample of an accretionary forearc basin from north central Anatolia and its implications for the history of subduction of Neotethys in Turkey. Geological Society America Bulletin 103, 22–36.
KOÇYİ⁄İT, A. & BEYHAN, A. 1998. A new intracontinental transcurrent structure: the Central Anatolian Fault Zone, Turkey. Tectonophysics 284, 317–336.
KOZLU, H. 1987. Misis-Andırın dolayının stratigrafisi ve yapısal evrimi [Stratigraphy and structural evolution of Misis-Andırın region]. Türkiye 7. Petrol Kongresi, Bildiriler Kitabı, 104–116.
LEO, G.W., MARVIN, R.F. & MEHNERTH.H. 1974. Geologic framework of the Kuluncak-Sofular area, east-central Turkey, and K-Ar ages of igneous rocks. Geological Society America Bulletin 85, 1785–1788.
ÖZGÜL, N. 1976. Torosların bazı temel jeolojik özellikleri [Basic geologic characteristics of Taurides]. Türkiye Jeoloji Kurumu Bülteni 19, 65–78.
ÖZGÜL, N. & TURflUCUA. 1984. Stratigraphy of the Mesozoic carbonate sequence of the Munzur Mountains (eastern Taurides). In: TEKELİ, O. & GÖNCÜO⁄LU, M. (eds), Geology of the Taurus Belt. General Directorate of Mineral Research and Exploration (MTA), Special Publication, Ankara, Turkey, 173–180.
PERİNÇEK, D. & KOZLU, H. 1984. Stratigraphy and structural relations of the units in the Afflin-Elbistan-Doğanflehir region (eastern Taurus). In: TEKELİ, O. & GÖNCÜO⁄LU, M. (eds), Geology of the Taurus Belt. General Directorate of Mineral Research and Exploration (MTA), Special Publication, Ankara, Turkey, 181–198.
PERİNÇEK, D., GÜNAY, Y. & KOZLU, H. 1987. Doğu ve güneydoğu Anadolu bölgesindeki yanal atımlı faylar ile ilgili yeni gözlemler [New observations on the strike-slip faults of east and southeast Anatolia]. Türkiye 7. Petrol Kongresi Bildiriler Kitabı, 89–103.
ROBERTSON, A.H.F. 2002. Overview of the genesis and emplacement of Mesozoic ophiolites in the eastern Mediterranean Tethyan region. Lithos 65, 1– 67.
ROBERTSON, A.H.F., ÜNLÜGENÇ, U., İNAN, N. & TASLI, K. 2004. The Misis–Andirin complex: mid-Tertiary subduction/accretion and melange formation related to closure and collision of the South- Tethys in S Turkey. Journal of Asian Earth Sciences 22, 413–453.
ROJAY, B., YALıNıZ, M.K. & ALTıNER, D. 2001. Tectonic implications of some Cretaceous pillow basalts from the North Anatolian ophiolitic mélange (central Anatolia-Turkey) to the evolution of Neotethys. Turkish Journal of Earth Sciences 10, 93–102.
SARAÇ, G., DEBRUIJN, H., GÜLEÇ, E., ÜNAY, E. WHITE, T. & VANMEULEN, A. 2000. Türkiye Omurgalı Fosil Yatakları [Mammalian Fossils of Turkey]. MTA Report [unpublished]
fiENGÖR, A.M.C. & YILMAZ, Y. 1981. Tethyan evolution of Turkey: a plate tectonic approach. Tectonophysics 75, 181–241.
SICKENBERG, O. 1975. Die Gliederung des höheren Jungtertiärs und Altquartärs in der Türkei nach Vertebraten und ihre Bedeutung für die internationale Neogen-Stratigraphie. Geologisches Jahrbuch 15, 1094–1116.
SÜMENGEN, M. & UYSAL, fi. 1990. Ağzıkara Project. Petroleum Potential of Kayseri-Gürün-Kahramanmarafl-Malatya Region. Exploration Mediterranean Inc. Report [unpublished]. Mobil
SYLVESTER, A.G. 1988. Strike-slip faults. Geological Society America Bulletin 100, 1666–1703.
ÜNAY, E. & BRUJIN, H. 1998. Plio-Pleistocene rodents and lagomorphs from Anatolia. Proceedings of SEQS-EuroMam Symposium 60, 432–485.
WESTAWAY, R. 2003. Kinematics of the Middle East and eastern Mediterranean updated. Turkish Journal of Earth Sciences 12, 5–46.
WESTAWAY, R. & ARGER, J. 2001. Kinematics of the Malatya–Ovacık fault zone. Geodinamica Acta 14, 103–131.
YALÇıN, M.N. & GÖRÜR, N. 1984. Sedimentological evolution of the Adana Basin. In: TEKELİ, O. & GÖNCÜO⁄LU, M.C. (eds), Geology of the Taurus Belt. General Directorate of Mineral Research and Exploration (MTA) Special Publication, 165–172.
YALıNıZ, M.K. & GÖNCÜO⁄LU, M.C. 1999. Clinopyroxene compositions of the isotropic gabbros from the Sarıkaraman Ophiolite: new evidence on supra-subduction zone type magma genesis in central Anatolia. Turkish Journal of Earth Sciences 8, 103–112.
YAZGAN, E. 1984. Geodynamic evolution of the Eastern Taurus regiıon. In: TEKELİ, O. & GÖNCÜO⁄LU, M.C. (eds), Geology of the Taurus Belt. General Directorate of Mineral Research and Exploration (MTA) Special Publication, 199–208.
YıLMAZ, Y., Yİ⁄İTBAfl¸ E. & GENÇ, C.fi. 1993. Ophiolitic and metamorphic assemblages of southeast Anatolia and their significance in the geological evolution of the orogenic belt, Tectonics 12, 1280–1297.