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GÜNEYDOGU ANADOLU ÇARPISMA KUSAGINDAKİ (MALATYA-ELAZIG-BNGÖL-DİYARBAKIR-ADIYAMAN) LİTOSFERİK YAPININ MANYETİK VE GRAVİMETRİK YÖNTEMLER İLE ARASTIRILMASI

INVESTIGATION OF THE LITHOSPHERIC STRUCTURE IN THE SOUTHEASTERN ANATOLIAN COLLISION ZONE (MALATYA-ELAZIG-BİNGÖL-DYARBAKIR-ADIYAMAN) WITH MAGNETIC AND GRAVIMETRIC METHODS

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Abstract (2. Language): 
In this study, gravity and aeromagnetic analysis have been conducted in the region of Malatya-Bingöl-Diyarbakır- Adıyaman, in order to elucidate the crustal structure beneath the region. Boundary analysis technique of the gravity and aeromagnetic data were performed to investigate frontiers and continuations of causative structures and compared with geological informations of the study area. The obtained boundaries of density and magnetization contrast correspond well to the major geological formations and the structural trends in the area as Bitlis-Pötürge Suture Zone (BPSZ) and East Anatolian Fault Zone (EAFZ). For estimating the source depths of causative structures, spectral analysis as power spectrum method was used. An average thickness of 44 km was calculated for the crust in the study area. A two dimensional crust model was generated by interpretation a SE-NW cross-section profile of gravity data using the Talwani modeling technique. According to this model, the thickness of the crust in the study area lies between 38 km to 51 km. The high gravity and magnetic anomalies around Elazıg in northern part of EAFZ are related with a body which has high magnetic and density material. In consequence of gravity and magnetic analysis, boundaries of four regions with different tectonic characters were identified. They are Arabian foreland, BPSZ, high magnetized body and Anatolian Block. Transition zone between BPSZ and high magnetized body is correlated by the EAFZ which has intense tectonic activity.
Abstract (Original Language): 
Malatya-Elazıg-Bingöl-Diyarbakır-Adıyaman bölgesinin kabuk yapısını ortaya koymak için bölgenin gravite ve havadan manyetik verileri analiz edilmistir. Gravite ve manyetik verilere Yapı Sınır Analizi (YSA) teknigi uygulanarak anomali yapılarının uzanım ve sınırları arastırılmıs ve çalısma alanına ait jeolojik bilgiler ile karsılastırılmıstır. Elde edilen sayısal sınırlar bölgedeki kıtasal bloklar ve yapısal trendler olan Bitlis-Pötürge Sütur Zonu (BPSZ) ve Dogu Anadolu Fay Zonu (DAFZ) ile uyum göstermektedir. Anomalilere neden olan kaynak derinliklerinin arastırılması için spektral analiz tekniklerinden güç spektrumu yönteminden yararlanılmıstır. Çalısma alanında ortalama kabuk derinligi 44 km olarak bulunmustur. Gravite verilerden GD-KB yönünde alınan kesit degerleri degerlendirilerek Talwani modelleme teknigine göre iki boyutlu bir kabuk modeli olusturulmustur. Buna göre çalısma alanında kabuk kalınlıgı güneyden kuzeye dogru 38 km ile 51 km arasında degisim göstermektedir. DAFZ’nin kuzey sınırındaki Elazıg civarındaki en yüksek gravite ve manyetik anomaliler, üst kabukta yüksek yogunluklu ve manyetizasyonlu malzemeye sahip bir yapıyla iliskilendirilmistir. Gravite ve manyetik verilerin analizi sonucunda; Arap levhası uç kesimleri, BPSZ, yüksek manyetizasyonlu yapı ve Anadolu Blogu olmak üzere farklı tektonik özelliklere sahip dört bölge belirlenmistir. BPSZ ve yüksek manyetizasyonlu bölge arasındaki geçis zonu, DAFZ’na karsılık gelmektedir.
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