Kopytenko Yu. A., Petrova A. A.
The paper presents new materials on the creation of digital maps of vertical and horizontal anomalies of the magnetic field of the spreading zones in the World Ocean. The results of the calculations are presented in the form of maps of the anomalies of vertical and horizontal components of the induction vector of the Earth’s magnetic field for the water area of the World Ocean. The task of identifying marine magnetic linear anomalies is considered not only from modular data, but also taking into account the advantages that the specificity of the appearance of the anomalies of the horizontal and vertical components can give. Component anomalies for the World Ocean are calculated using the SPbF IZMIRAN component model of the Earth’s magnetic field. On the example of the mid-oceanic ridge in the North Atlantic, the appearance of alternating strip magnetic anomalies of the horizontal and vertical components is shown. Based on the study of changes in the structure of anomalies of vertical and horizontal component of the Earth’s magnetic field and their intensity with height, an assessment was made of the effectiveness and information content of landmarks for the purposes of air navigation in the spreading zone. The components of magnetic anomalies presented in this paper may be of interest for the theory of plate tectonics, the specification of the age of the ocean lithosphere, and the mode of formation of the ocean floor due to the spatial and temporal movement of tectonic plates. The specificity of the structure of magnetic anomalies of the spreading zones increases the importance of the parameters of the navigation informativity of the anomalies of the vertical and horizontal components of the magnetic field. This expands the possibilities of their use in autonomous correlation-extremal sea and air magnetic navigation in the difficult conditions of the waters of the ocean basins.
