VERTICAL AND HORIZANTAL ANALYSIS OF CRUSTAL STRUCTURE IN EASTERN ANATOLIA REGION

Yıl 2015, , 217 - 229, 19.12.2015

Oya Pamukçu , Tolga Gönenç , Ayça Yurdakul Çırmık , Şevket Demirbaş Seyit Tosun

https://doi.org/10.19111/bmre.93047

Cited By: 1

Öz

The tectonic regime of Eastern
Anatolia is determined by Arabian-Eurasian continentcontinent convergence and
the mechanism occurred with the convergence. North Anatolian Fault Zone (NAFZ),
Eastern Anatolian Fault Zone (EAFZ), North Eastern Anatolian Faults and Bitlis
Zagros Suture Zone are formed by this convergence, represent the characteristic
of lithospheric structure of the region. In the scope of this study, the gravity
anomalies of Eastern Anatolia were used for investigating the lithospheric
structure. Firstly, second order trend analyses were applied to gravity data
for examining the characteristic of the anomaly. Later, the vertical and
horizontal derivatives methods were applied to the same data. Generally, the
purpose of the applying derivative methods is determining the vertical and
horizontal borders of the structure. Therefore, this method gives the opinion
about the characteristic of the lithospheric structure of the study region.
According to the results of derivative methods, the structure transitions were
increased rather especially with Bitlis Zagros Suture Zone. At the last step,
the gravity studies were evaluated together with the seismic activity of the
region. Consequently, the geodynamical structure of the region is examined with
the previous studies done in the region.

Anahtar Kelimeler

Eastern Anatolia, gravity, derivative methods, heat flow

Kaynakça

• Al-Lazki, A., Seber, D., Sandvol, E., Türkelli, N., Mohamad R., Barazangi, M. 2003. Tomographic Pn ve- locity and anisotropy structure beneath the Anato- lian plateau (eastern Turkey) and the surrounding regions. Geophysical Research Letters 30, 24, 8043, doi: 10.1029/2003GL017391.
• Barka, A.A., Toksöz, M.N., Gülen, L., Kadinsky-Cade K. 1987. Segmentation, seismicity and earthquake po- tential of the eastern section of the North Anatoli- an Fault Zone. Yerbilimleri, Bulletin of the Earth Sciences Application and Research Centre of Ha- cettepe University 14, 337-352.
• Barka, A.A., Reilinger, R. 1997. Active tectonics of the Mediterranean region: deduced from GPS, neotectonic and seismicity data. Annali di Geofisica XI. 587-610.
• Bird, P., Toksöz, M.N., Sleep, N.H. 1975. Thermal and mechanical models of continent-continent conver- gence zones, Journal of Geophysical Research, 80, 4405-4416.
• Blakely R. J., Simpson R. W. 1986. Approximating edges of source bodies from magnetic or gravity anomalies. Geophysic, 51, 7, 1494-1498.
• Bozkurt, E. 2001. Neotectonics of Turkey-a synthesis. Geodinamica Acta 14, 3-30.
• Butler, D., K. 1984. Microgravimetric and gravity gradient techniques for subsurface cavities. Geophysic, 49,1084-1096.
• Coney, P.J., Jones, D.L., Monger, J.W. 1980. Cordilleran suspect terranes. Nature 288, 329-3.
• Demets, C., Gordon, R.G., Argus, D.F., Stein, S. 1994. Ef- fects of recent revisions to the geomagnetic rever- sal time scale on estimates of current plate moti- ons. Geophysical Research Letters 21, 2191-2194.
• Dewey, J.F. 1976. Seismicity of northern Anatolia. Bulletin of the Seismological Society of America 66, 843- 68.
• Dewey, J.F. 1977. Suture zone complexities: a review. Tec- tonophysics 40, 53-67.
• Dewey, J.F., Hempton, M.R., Kidd, W.S.F., Şaroğlu F., Şengör A.M.C. 1986. Shortening of continental lithospere: the neotectonics of eastern Anatolia- a young collision zone. Geological Society Special Publications 19, 3-36
• Gök, R., Sandvol, E., Türkelli, N. Seber, D., Barazangi, M. 2003. Sn attenuation in the Anatolian and Iranian plateau and surrounding regions. Geophysical Research Letters 30, 24, 8042, doi: 10.1029/2003GL018020.
• Gönenç, T. 2014. Investigation of distribution of embedded shallow structures using the first order vertical de- rivative of gravity data. Journal of Applied Geoph ysics, 104, 44-57.
• Gürsoy, H., Temiz, H., Poisson, A.M. 1992. Recent faul- ting in the Sivas area (Sivas Basin), Central Anato- lia- Turkey. Cumhuriyet University Bulletin of the Faculty of Engineering Serie A-Earth Sciences 9,1-11.
• Kahle H.G., Straub, C., Reilinger, R., McClusky, S., King, R., Hurst, K., Veis, G., Kastens, K., Cross, P. 1998. The strain rate field in the eastern Mediterranean region, estimated by repeated GPS measurements. Tectonophysics 294, 237-252.
• Kelling, G., Gökçen, S.L., Floyd, P.A., Gökçen, N.D. 1987. Neogene tectonics and plate convergence in the eastern Mediterranean: new data from southern Turkey. Geology 14, 425-429.
• Keskin, M. 2003. Magma generation by slab steepening and breakoff beneath a subduction-accretion complex: An alternative model for collision-related volca- nism in Eastern Anatolia, Turkey. Geophysical Research Letters 30, 24, 8046, doi: 10.1029/2003GL018019.
• Keskin, M., Pearce, J.A., Mitchell, J. G. 1998. Volcano- stratigraphy and geochemistry of collision-related volcanism on the Erzurum-Kars Plateau, North Eastern Turkey. Journal of Volcanology and Geot- hermal Research 85, 355-404.
• Ketin, İ. 1948. Uber die tektonisch-mechanischen Folge- rungen aus den grossen Anotolischen Erdbeben des letzten Dezenniums, Geol. Rdsch. 36, 77-83
• Ketin, İ. 1966. Tectonic units of Anatolia. Bulletin of the Mineral Research and Exploration 66, 23-34.
• Koçyiğit, A., Yılmaz, A., Adamia, S., Kuloshvili, 2001.Neotectonics of East Anatolian Plateau (Turkey) and Lesser Caucasus: implications for transition from thrusting to strike-slip faulting. Geodinamica Acta, 14, 177-195.
• McKenzie, D. 1972. Active tectonics of the Mediterranean region. Geophysical Journal of the Royal Astrono- mical Society 30, 109-185.
• McKenzie, D. 1976. The East Anatolian fault: a major structure in eastern Turkey. Earth and Planetary Science Letters 29, 189-193.
• McKenzie, D.P., Bickle, M. J. 1988. The volume and com- position of melt generated by extension of the lit- hosphere. Journal of Petrology 29, 625-679.
• Oral, M.B., Reilinger, R.E., Toksöz, M.N., Kong, R.W., Barka, A.A., Kınık, İ., Lenk, O. 1995. Global po- sitioning system offers evidence of plate motions in eastern Mediterranean. American Geophysical Union, EOS, Transactions 76, 9-11.
• Örgülü, G., Aktar, M., Türkelli, N., Sandvol, E., Barazangi, M. 2003. Contribution to the seismotectonics of the Eastern Anatolian Plateau from moderate and small size events. Geophysical Research Letters 30, 24, doi:10.1029/2003GL018258.
• Pamukçu, A., O., Akçığ, Z., Demirbafl, Ş., Zor, E. 2007. In- vestigation of crustal thickness in Eastern Anatoli- a using gravity, magnetic and topographic data. Pure and Applied Geophysics 164, 11, 2345-2358.
• Pamukçu, A., O., Akçığ, Z. 2011. Isostasy of the Eastern Anatolia (Turkey) and discontinuities of its crust. Pure and Applied Geophysics 168, 5, 901-917.
• Pamukçu, O., Akçığ, Z. Hisarlı, M., Tosun, S. 2014. Curie point depths and heat flow of Eastern Anatolia (Turkey). Energy Sources, Part A: Recovery, Utilization, and Environmental Effects 24, 2699-2706.
• Pearce, J. A., Benger, J.F., De Long, S.E., Kidd, W.S.F, Low, P.J., Güner, Y., Şaroğlu, F., Yılmaz, Y., Mo- orbath, S., Mitchell, J.G. 1990. Genesis of collisi- on volcanism in Eastern Anatolia, Turkey. Journal of Volcanology and Geothermal Research 44, 189- 229.
• Pearce, J.A., Keskin, M., Serri, G., Innocenti, F. 1995. Tec- tonic significance of volcanism related to arc-con- tinent collisions. American Geophysical Union, EOS, Transactions 76, 602-607.
• Reilinger, R.E., McClusky, S.C., Oral, M.B., King, W., Toksöz, M.N. 1997. Global Positioning, System measurements of present-day crustal movements in the Arabian-Africa-Eurasia plate collision zone. Journal of Geophysical Research 102, 9983-9999.
• Robertson, A.H.F., Clift, P.D., Degnan P., Jones G. 1991. Palaeogeographic and paleotectonic evolution of eastern Mediteranean region. Palaeogeography, Palaeoclimatology, Palaeoecology 87, 289-344.
• Rotstein, Y., Kafka, A.L. 1982. Seismotectonics of the southern boundary of Anatolia, eastern Mediterrane- an region: subduction, collision, and arc jumping. Journal of Geophysical Research 87, 7694-7706.
• Rybach, L., Mueller, S., Mılnes, A.G., Ansorge, J., Berno- ulli, D., Frly, M. 1980. The Swiss Geotraverse Ba- sel-Chiaser-a review. Eclogae Geologicae Helve- tiae 73, 437-62.
• Sandvol, E., Türkelli, N., Barazangi, M. 2003a. The eastern Turkey seismic experiment: the study of a young continent- continent collision. Geophysical Research Letters 30, 24, 8038, doi:10.1029/2003GL018912.
• Sandvol, E., Türkelli, N., Zor, E., Gök, R., Bekler, T., Gür- büz, C., Seber, D., Barazangi, M. 2003b. Shear wa- ve splitting in a young continent- continent collisi- on: an example from eastern Turkey. Geophysical Research Letters 30, 24, 8041, doi:10.1029/2003GL017390.
• Şengör, A. M. C., Kidd, W.S.F. 1979. The post-collisional tectonics of the Turkish-Iranian Plateau and a com- parison with Tibet. Tectonophysics 55, 361-376.
• Şengör, A.M.C., Yılmaz, Y. 1981. Tethyan evolution of Turkey: a plate tectonic approach. Tectonophysics 75, 181-241.
• Şengör, A.M.C., Görür, N., Şaroğlu, F. 1985. Strike-slip fa- ulting and related basin formation in zones of tec- tonic escape: Turkey as a case study, in : Biddle K.T., Christie-Blick N. (Eds.), Strike-slip Faulting and Basin Formation. Society of Economic Paleontologist Mineralogists Special Publication 37, 227- 264.
• Şengör, A. M. C., Özeren, S., Genç, T., Zor, E. 2003. East Anatolian high plateau as a mantle-supported, north-south shortened domal structure. Geophysical Research Letters 30, 24, 8045, doi: 10.1029/2003GL017858.
• Türkelli, N., Sandvol, E., Zor, E, Gök, R., Bekler,T., Al- Lazki,A., Karabulut,H., Kuleli,S., Eken,T., Gürbüz,C., Bayraktutan, S., Şeber, D., Barazangi, M. 2003. Seismogenic zones in eastern Turkey. Geophysical Research Letters 30, 24, 8039, doi: 10.1029/2003GL018023.
• Westaway, R., Arger, J. 1996. The Gölbaflı basin, southe- astern Turkey: A complex discontinuity in a major strike-slip fault zone. Journal of Geological Soci- ety 153 , 729-743.
• Yılmaz, Y., Yiğitbafl, E., Genç, C.Ş. 1993. Ophiolitic and metamorphic assemblages of southeast Anatolia and their significance in the geological evolution of the orogenic belt. Tectonics 12, 1280-1297.
• Zor, E., Sandvol, E., Gürbüz, C., Türkelli, N., Şeber, D., Barazangi, M. 2003. The crustal structure of the East Anatolian plateau (Turkey) from receiver functions. Geophysical Research Letters 30, 24, 8044, doi: 10.1029/2003GL018192.