AN INVESTIGATION ON EDGE DETECTION OF STRUCTURES AND DEPTH ESTIMATION OF ISPARTA ANGLE REGION (SOUTHWEST TURKEY) USING AEROMAGNETIC DATA

Abstract

This paper aims to delineate the subsurface structures and their depths located in the Isparta Angle region (SW Turkey) through the aeromagnetic data. The dataset has been processed via the well-known mathematical tools such as spectral analysis and derivative methods. First, to separate these anomalies from each other, the spectral analysis has been completed and high anomaly regions have been determined around Isparta city. This could be attributed to the fact that these values might be stem from magnetic bodies (like volcanic cones, caldera) located in the Golcuk volcanic region. In addition, the average depths of deep and shallow causative bodies have been calculated to be 6.72 km and 0.31 km, respectively. Secondly, to delineate the exact location and the depth to top of the sources, analytic signal transformation and tilt method have been applied to the residual anomalies. The maps show six regions which have the high magnetization values and these anomalies have been investigated in detail to delineate the upper depths of subsurface structures. Especially, the study showed that Golcuk volcanic occurrences, which are one of the crucial structures in the region, have a deeper root (around 3.47 km) and larger lying magnetic bodies underneath the surface.

Keywords

• Isparta Angle
• Analytic signal
• Tilt angle derivative
• Aeromagnetic data

ISPARTA AÇI BÖLGESİ (GÜNEYBATI TÜRKİYE) YAPILARIN SINIR TESPİTİ VE DERİNLİK TAHMİNİ ÜZERİNE HAVA MANYETİK VERİLERLE BİR ARAŞTIRMA

Abstract

Bu makale, Isparta Açı bölgesinde (GB Türkiye) yer alan yeraltı yapılarını ve derinliklerini aeromanyetik veriler aracılığıyla tanımlamayı amaçlamaktadır. Veri seti, spektral analiz ve türev yöntemleri gibi iyi bilinen matematiksel araçlar aracılığıyla işlenmiştir. Öncelikle bu anomalileri birbirinden ayırmak için spektral analiz uygulanmış ve Isparta ili çevresinde yüksek anomalili bölgeler belirlenmiştir. Bu durum, bu değerlerin Gölcük volkanik bölgesinde yer alan manyetik cisimlerden (volkanik koniler, kaldera gibi) kaynaklanıyor olabileceğine bağlanabilir. Ayrıca derin ve sığ kaynaklı cisimlerin ortalama derinlikleri sırasıyla 6,72 km ve 0,31 km olarak hesaplanmıştır. İkinci olarak, kaynakların tam yerini ve en üst noktaya kadar olan derinliğini belirlemek için rezidüel anomalilere analitik sinyal dönüşümü ve tilt yöntemi uygulanmıştır. Haritalar, yüksek manyetizasyon değerlerine sahip altı bölgeyi göstermiştir ve bu anomaliler, yeraltı yapılarının üst derinliklerini betimlemek için ayrıntılı olarak incelenmiştir. Özellikle çalışma, bölgedeki önemli yapılardan biri olan Gölcük volkanik oluşumlarının daha derin bir köke (yaklaşık 3.47 km) ve yüzeyin altında daha büyük manyetik kütlelere sahip olduğunu göstermiştir.

Keywords

• Isparta Açısı
• Analitik sinyal
• Tilt açısı türevi
• Havadan manyetik veri

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