Separation of sources and 3D inversion of gravity and magnetic data for the Thuringian Basin, Germany

• Main Authors: Ilya PRUTKIN, Gerhard JENTZSCH, Thomas JAHR
• Format: Article
• Language: English
• Published: Earth Science Institute, Slovak Academy of Sciences, Slovakia 2012-06-01
• Series: Contributions to Geophysics and Geodesy
• Subjects: potential field methods, 3d inversion, pseudo-gravity, sedimentary basin
• Online Access: https://journal.geo.sav.sk/cgg/article/view/68

We propose a novel methodology for separation of potential field sources and its 3D inversion. New approaches are developed to separate sources: i) in depth using a succession of upward and downward continuation; ii) in the lateral direction by means of approximation with the field of 3D line segments; iii) according to density and magnetization contrast based on pseudo-gravity calculation. Our original inversion algorithms allow the recovery of unknown 3D geometry both for a restricted body of arbitrary shape and for a contact surface. For the first time, we apply our algorithms to joint inversion of gravity and magnetic data for a large area (the Thuringian Basin in central Germany). We separate in depth sources of both gravitational and magnetic anomalies for the whole territory of Thuringia and compare corresponding components. A 3D model of the main sources is presented based on approximation with 3D line segments and their further transforming into a restricted body or a contact surface with the same field.