Curie point depths based on spectrum analysis of aeromagnetic data, West Anatolian extensional province, Turkey

Abstract

The Curie point depth map of Western Anatolia was constituted from spectral analysis of the aeromagnetic data. The Curie point depth values from 53 overlapping blocks, 90 x 90 km in size, have been estimated from the band-pass filtered data. The slope of the longest wavelength part of the radially averaged log power spectrum divided by the radial frequency produced the depth to the centroid (z(0)) for the deepest crustal block. The depth to the top (z(t)) was obtained by the slope of the second longest wavelength part of the spectrum. From these depths, the Curie point depth was then calculated by using z(b)=2z(0)-z(t). The Curie point depth estimates for Western Anatolia range between 8.2 and 19.9 km.