Ph.D. Tezi Görüntüleme

Student:	Nafiz MADEN
Supervisor:	Prof. Dr. Kenan GELİŞLİ
Department:	Geophysical Engineering
Institution:	Graduate School of Natural and Applied Sciences
University:	Karadeniz Technical University, Turkey

Title of the Thesis:	Investigation of Structure Styllious and the Crustal Structure of the Eastern Pontides Orogenic Belt with Geophysical Methods
Level:	Ph.D.
Acceptance Date:	1/1/1980
Number of Pages:	149
Registration Number:	di478

Summary:

The Eastern Pontide active continental margin extending along the Black Sea coast compries of the three sub-tectonic unites based on the their lithology and facies associations, from north to south, as the northern zone, the southern zone and the axial zone. Left lateral movement of the Arabian-African plates with respect to Eurasia plate and opening of Atlantic Ocean controlled the geologic evolution of the Eastern Pontides. In this area NE, NW and E-W trending fault systems separete these three zones and play an important role in active tectonic of the Eastern Pontides.

In this study, the tectonic structure, Moho topography and depth of Curie point of the region were tried to determine. To find out the fault systems that control the tectonics of these three diffrent zones of the Eastern pontides, the horizontal gradient map of the gravity anomaly data. It is deduced that these lineaments are seen on the horizontal gradient map of the gravity anomaly data. It is deduced that these lineaments trending E-W, NE and NW directions must separete the major structure zones of continental crust of Eastern Pontides. To estimate the crustal structure of the region, the power spectrum method, a statistical approaching technique, was used. This metod provides a relationship between spectrum of the anomalies and the depth of sources in the frequency domain. The Power spectrum method was applied to bouguer gravity and magnetic data of the Eastern Pontide Orogenic Belt, respectively, to determine the Moho and Curie point depth.

In the Eastern Pontides, the depth of Moho varies from 35.6 km to 45.1 km. On the other hand, it is determined that the Curie point depth changes between 17.4 and 31.2 km. The gravity inversion method was also used to investigate the Moho surface. It is determined that there is a good agreement between the depths obtained from power spectra analysis and septh of the Moho estimated from the gravity from the gravity inversion.