Interpretation of aeromagnetic data of the Sivas Basin in the central eastern Turkey

The Sivas Basin is located in the eastern part of the central Anatolia. In this study, aeromagnetic data in the basin and surrounding area are processed and anomalies are interpreted to determine the approximate locations of the causative bodies and reveal their relationship with the tectonic trends. The sedimentary basin is surrounded by strong magnetic anomalies from the south, east, and northeast. The most apparent anomalies are observed in the E-NE of Zara, SW of Divriği, and north of Kangal. These anomalies do not present significant directional change when they are reduced to the pole process. Causative bodies of the southern anomalies around Divriği and Kangal extend from NE to SW and the northerly anomaly trend (to the north of Kangal) crosses the southern one (Divriği trend) in the analytic signal map. These trends are well-defined by the maxima points of the horizontal derivatives and these maxspots generally follow the boundaries of anomalies in the tilt angle map. The Kangal Fault controls the extensions of the Divriği anomalies through the north and they are not observed in the area to the north of the fault. The Hafik Anomaly in the north of the study area is also differentiated from the anomaly group in the E-NE of Zara precisely, defining that they are created by 2 different causative bodies. Aeromagnetic characteristics of the ophiolites to the south indicate that they have different origin from the northern ophiolites group. Similarly, it is determined that the plutonic rocks in the south and north are also different origin emplacements, considering their aeromagnetic responses, mineral contents, and ore deposit possibilities.

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Alparslan M, Guezou JC, Boztuğ D (1995). Structural and metamorphic features of the easternmost part of the Kırşehir Block. In: Second International Turkish Geology Workshop; Sivas, Turkey. Abstract Book, pp. 12.
Aydın I, Karat HI, Kocak A (2005). Curie point depth map of Turkey. Geophysical Journal International 162: 633-640.
Bayhan H (1986). İç Anadolu Granitoyid Kusağı’ndaki Celebi Sokulumu’nun jeokimyasi ve kokensel yorumu. Jeoloji Mühendisliği Dergisi 29: 27-36.
Bektaş Ö, Ravat D, Büyüksaraç A, Bilim F, Ateş A (2007). Regional geothermal characterisation of east Anatolia from aeromagnetic, heat flow and gravity data. Pure and Applied Geophysics 164: 975-998.
Bhattacharyya BK, Leu LK (1975). Analysis of magnetic anomalies over Yellowstone National Park: mapping of Curie point isothermal surface for geothermal reconnaissance. Journal of Geophysical Research 80: 4461-4465.
Blakely RJ (1996). Potential theory in gravity and magnetic applications. London, UK: Cambridge University Press, Bozkurt E, Mittwede SK (2005). Introduction: evolution of continental extensional tectonics of western Turkey. Geodinamic Acta 18:153-165.
Boztuğ D (1997). Post-collisional Central Anatolian Alkaline Plutonism, Turkey. Tubitak-Bayg/Nato-D Program on Alkaline Magmatism, Sivas-Turkey. Proceedings Book, pp. 105-146.
Boztuğ D, Yılmaz S, Keskin Y (1994). İç-Doğu Anadolu Alkalin Provensindeki Kösedağ Plütonu (Suşehri-KD Sivas) dogu kesiminin petrografisi ve petrojenezi. Türkiye Jeoloji Bülteni 37: 1-14.
Büyüksaraç A (2007). Investigation into the regional wrench tectonics of inner East Anatolia (Turkey) using potential field data. Physics of the Earth and Planetary Interiors 160: 86-95.
Cater JML, Hana SS, Ries AC, Tunner P (1991). Tertiary Evolution of the Sivas Basin. Tectonophysics 195: 29-46.
Darin MH, Umhoefer PJ (2019). Structure and kinematic evolution of the southern Sivas fold-thrust belt, Sivas Basin, central Anatolia, Turkey. Turkish Journal of Earth Sciences 28: 834- 859.
Dewey JF, Hempton MR, Kidd WSF, Saroglu F, Sengor AMC (1986). Shortening of continental lithosphere. In: Coward, MP and Ries, AC (editors). The neotectonics of Eastern Anatolia-a young collision zone, in Collision Tectonics, Geological Society Special Publication 19: 3-36.
Erik NY, Aydemir A, Büyüksaraç A (2015). Investigation of the Organic Matter Properties and Hydrocarbon Potential of the Sivas Basin, Central Eastern Anatolia, Turkey, using Rock-Eval data and Organic Petrography. Journal of Petroleum Science and Enginering 127: 148-168.
Erkan Y (1981). Orta Anadolu masifini metamorfizması üzerinde yapılmış çalışmalarda varılan sonuçlar. İç Anadolu’nun Jeolojisi Simpezyumu, Türkiye Jeoloji Kurumu 35. Bil. ve Tek. Kurultayı; Ankara, Turkey. pp. 9-11,
Gansser A (1974). Himalaya. Geological Society London, Special Publications 4: 267-278.
Geven A, Unan C, Erler A, Akiman O (1993). Cefalikdağ granitoidinin petrolojisi (Kaman-Kırşehir). In: 25th Anniversary Symposium of Hacettepe University Earth Sciences; Ankara, Turkey, Abstract Book. pp. 43 (in Turkish with English Abstract).
Görür N, Tüysüz O, Şengör AMC (1998). Tectonic evolution of the Central Anatolian basins. International Geology Review 40: 831-850.
Guezou JC, Temiz H, Poisson A, Gürsoy H (1996). Tectonics of the Sivas Basin: The Neogene record of the Anatolian accretion along the Inner Tauric Suture. International Geology Review 38: 901-925.
Kangal Ö, Erdem NÖ, Varol BE (2017). Depositional stages of the Eğribucak inner basin (terrestrial to marine evaporite and carbonate) from the Sivas basin (central Anatolia, Turkey). Turkish Journal of Earth Sciences 26: 127-146.
Legeay E, Mohn G, Callot JP, Ringenbach JC, Ulianov A et al. (2019). The pre-obduction to post-obduction evolution of the Sivas ophiolite (Turkey) and implications for the precollisional history of Eastern Anatolia. Tectonics 38: 2114-2141.
Miller HG, Singh V (1994). Potential filed tilt-a new concept for location of potential field sources. Journal of Applied Geophysics 32: 213-217.
Nabighian MN (1972). The analytic signal of two-dimensional magnetic bodies with polygonal cross-section: its properties and use for automated anomaly interpretation. Geophysics 37: 507-517.
Okubo Y, Graf RJ, Hansen RO, Ogawa K, Tsu H (1985). Cruie Point Depths of the Island of Kyushu and Surrounding Areas, Japan. Geophysics 50: 481-494.
Önal KM, Büyüksaraç A, Aydemir A, Ateş A (2008). Investigation of the deep structure of the Sivas Basin with geophysical methods, Innereast Anatolia, Turkey. Tectonophysics 460: 186-197.
Pamukcu 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 36: 2699-2706.
Pichat A, Hoareau G, Callot JP, Ringenbach JC (2019). Characterization of Oligo-Miocene evaporite-rich minibasins in the Sivas Basin, Turkey. Marine and Petroleum Geology 110: 587-605.
Piper JDA, Tatar O, Gürsoy H, Koçbulut F, Mesci BL (2006). Palaeomagnetic Analysis of Neotectonic Deformation in the Anatolian Accretionary Collage, Turkey. Geological Society of America (Spec. Publ.) 409: 417-440.
Poisson A, Guezou JC, Ozturk A, İnan S, Temiz H et al. (1996). Tectonic setting and evolution of the Sivas Basin, Central Anatolia, Turkey. International Geology Review 38: 838-853.
Ravat D, Pignatelli A, Nicolosi I, Chiappini M (2007). A study of spectral methods of estimating the depth to the bottom of magnetic sources from near-surface magnetic anomaly data. Geophysical Journal International 169: 421-434.
Roest WR, Verhoef J, Pilkington M (1992). Magnetic interpretation using the 3D analytic signal. Geophysics 57: 116-125.
Salem A, Williams S, Fairhead D, Smith R, Ravat D (2008). Interpretation of magnetic data using tilt-angle derivatives. Geophysics 73: L1-L10.
Şengör AMC (1979). Mid-Mesozoic closure of Permo-Triassic: Tethys and its implications: Nature 279: 590 593.
Spector A, Grant FS (1970). Statistical models for interpretation aeromagnetic data. Geophysics 35: 293-302.
Tanaka A, Okubo, Y, Matsubayashi O (1999). Curie point depth based on spectrum analysis of the magnetic anomaly data in east and southeast Asia. Tectonophysics 306, 461-470.
Tatar O (1992). On the some tectonic structures in easternmost and southeastern Turkey and their significance to the geodynamics of the Arabian Plate. In: First Int. Symp. Eastern Mediterranean Geology. Adana, Turkey. Yerbilimleri (Geosound), Special Issue pp. 91-101.
Temiz H, Poisson A, Guezou JC, Tutkun Z (1991). The tectonic style, timing and rate of shortening at the eastern end of the Sivas Basin, Kemah, Turkey. Terra (Abs.), 3: 269.
Temiz H, Guezou JC, Poisson A, Tutkun Z (1993). Tectonostratigraphy and kinematics of the eastern end of the Sivas Basin (central eastern Turkey): Implications for the so-called “Anatolian Block”. Geological Journal 28: 239-250.
Verduzco B, Fairhead JD, Green CM, MacKenzie C (2004). New insights into magnetic derivatives for structural mapping. Leading Edge 23: 116-119.
Yılmaz A (1985). Yukarı Kelkit Çayı ile Munzur Dağları arasının temel jeolojik özellikleri ve yapısal evrimi. Türkiye Jeoloji Kurumu Bülteni 28: 79-92.
Yılmaz A, Terzioğlu N (1994). The geotectonic setting of Late Cretaceous-Tertiary volcanism along the Eastern Pontian Zone. In: International Volcanological Congress, Theme-2, Ankara. Abstract Book pp. 39.
Yılmaz A, Yılmaz H (2006). Characteristic features and structural evolution of a post collisional basin: The Sivas Basin, central Anatolia, Turkey. Journal of Asian Earth Science 27: 164-176.
Yılmaz S, Boztuğ D, Öztürk A (1993). Geological setting, petrographic and geochemical characteristics of the Cretaceous and Tertiary igneous rocks in the Hekimhan-Hasancelebi area, northwest Malatya, Turkey. Geological Journal 28: 383-398.