Correlation between gravity and magnetic anomalies of Western Anatolia and its relation to tectonic structures

Z Düzgit,N Sayin,Z M Hisarli,N Orbay

doi:10.1186/bf03352599

Abstract

Abstract In this paper, we apply for the first time the moving-windows application of the Poisson’s theorem to the synthetic gravity and magnetic data, followed by calculations of the correlations of the Bouguer gravity and aeromagnetic data of Western Anatolia. The correlation coefficient, slope and intercept parameters were generated from the internal correlations existing between the gravity and magnetic anomalies. Relative negative correlation values of positive gravity and negative magnetic anomalies were found on the Menderes Massif and in the southern part of the Marmara sea. Higher heat flow values were also obtained from these regions. The negative correlation values can be seen on a profile taken along the 28°E longitude and are sourced from a large graben system which has been generated as a result of lithospheric extension in Western Anatolia since the Early Miocene. The grabens were filled up by approximately 2000-m-thick sediments. The negative correlation coefficients and high heat flow values correspond to relative uplift of the asthenosphere in these regions.

Highlights

With the help of Poisson’s theorem, the relation between magnetic and gravitational potentials due to the same source having uniform density and magnetization contrast can be given free from the shape and position of the source
One correlation values set was calculated by using this relationship between the gravity and magnetic data for the region under consideration
Chandler et al (1981) first applied this method to synthetic models, but they subsequently obtained successful results when they applied the methods to the gravity and magnetic anomalies in and around Michigan and Lake

Summary

Introduction

With the help of Poisson’s theorem, the relation between magnetic and gravitational potentials due to the same source having uniform density and magnetization contrast can be given free from the shape and position of the source. (1981), suggested a new method of analysis based on the Poisson’s theorem for calculating the correlation of the gravity and magnetic anomalies. One correlation values set was calculated by using this relationship between the gravity and magnetic data for the region under consideration. Chandler et al (1981) applied the Poisson’s theorem to divided regions by using the moving windows method They calculated a number of correlation values for the area under study instead of only one. By substituting B and X instead of (J/σ ) and uniform density and magnetization contrasts This relationship, is independent of the shape and position of (1/G)(∂g/∂z), respectively, in Eq (3), we get a linear equation as the source. The sampling interval of the data is taken as 1 km

Single rectangular prism

Two Vertically superimposed rectangular prisms

Window length selection