Interpretation of magnetic data in the Sinop area of Mid Black Sea, Turkey, using tilt derivative, Euler deconvolution, and discrete wavelet transform

The identification of lineaments in magnetic anomaly data is an important step in interpretation. In this paper, three methods for locating magnetic lineaments are applied to total field magnetic anomaly data of the Sinop area of mid Black Sea, northern Turkey. Based upon the variation in magnetic lineaments, structural map of the study area was obtained. The tilt derivative (TDR), Euler deconvolution (ED) and discrete wavelet transform (DWT) have been of great utility in the interpretation of magnetic anomaly data. These three methods were applied to enhance magnetic anomalies due to anomalous sources in part of the basement complex of study area. The TDR obtained from the magnetic anomaly reduced to pole (RTP) was designed to map geologic contacts. The source boundaries and depths are determined from the zero contours, and the half distance between ± π/4 contours or the distance between zero and + π/4 or − π/4 contour of TDR, respectively. The ED technique is used to estimate the source depth at the semi-infinite contact location. The DWT technique was carried out to infer the substructure orientation. The direction of maxima and minima coefficients of the horizontal, vertical and diagonal decompositions of the DWT works in imaging the horizontal locations of the anomalous sources. The results allow us to image and characterize subsurface lineaments for the survey area.

Research highlights
► We analyze the magnetic data to identify subsurface lineaments in the Sinop basin.
► The zero contours of tilt derivative delineate the spatial location of the contacts.
► The Euler deconvolution was employed to estimate source type and locations.
► The wavelet decompositions were carried out to infer the substructure orientation.
► All methods enable us to map a part of the southern border zone of the Sinop basin.