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INVESTIGATION OF GRAVITY ANOMALIES OF ÇANKIRI BASIN (NORTHERN CENTRAL ANATOLIA, TURKEY) USING THE BOUNDARY ANALYSIS AND ANALYTIC SIGNAL METHOD AND 3D MODELING

Journal Name:

  • İstanbul Yerbilimleri Dergisi

Publication Year:

  • 2010

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
The Cankiri Basin is one of larger basins in central Anatolia and generated by closing of the northern branch of Neotethys during the Late Cretaceous to Late Eocene. The analysis of gravity anomalies shows a lower density and thickened continental crust in the north of the study region. The lower density and thickened continental crust in the study region are consistent with Airy model accounting for isostasy. Power spectrum analysis of gravity data suggests five sources at depths ranging from 0.23 km to 10.8 km from the surface. Processing of the gravity data indicates that the NE-SW trending high zone controlled the eastern boundary of the Cankiri Basin (CB). The analytic signal method which is composed of vertical and horizontal field derivatives are common and useful method for interpretation of the gravity or/and magnetic data. The average sedimentary thickness of the CB determined the analytic signal depth model and 3D modeling of the gravity anomalies is determined as  4.4 km and  3.5 km, respectively.
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Abstract (Original Language): 
Çankırı Havzası orta Anadolu’daki en büyük havzalardan birisidir ve geç Kretesa-geç Eosen boyunca Neotetis’in kuzey kolunun kapanması ile oluşmuştur. Gravite anomalilerinin analizi, çalışma alanının kuzeyinde düşük yoğunluk ve kıtasal kabuk kalınlaşması göstermektedir. Çalışma alanındaki düşük yoğunluk ve kıtasal kabuk kalınlaşması isostasy için Airy modeli ile uyumludur. Gravite verilerine uygulanan güç spektrumu analizi, yüzeyden itibaren derinlikleri 0.23 km ile 10.8 km arasında değişen olası beş kaynağı önermektedir. Gravite verinin prosesi Çankırı Havzası’nın (CB) doğu sınırını kontrol eden KD-GB yönelimli bir yükselim zonuna işaret etmektedir. Gravite ve/veya manyetik anomali verilerinin yorumunda, alanın düşey ve yatay türevlerini kapsayan Analitik Sinyal yöntemi yaygın ve kullanışlı bir yöntemdir. Gravite anomalilerinin 3B modeli ve analitik sinyalden oluşturulan derinlik modellerinden, Çankırı Havzası’nda sırasıyla 3.5 km ve 4.4 km sedimanter kalınlıkları belirlenmiştir.
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  • 2
87-95
  • English

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