The analysis of geophysical studies carried out in recent years within the Pechenga structural zone makes it possible, taking into account the available geological data, to illuminate its deep geological structure. Most researchers (G. T. Makeenko, L. Y. Kharitonov, N. M. Parfenenko) present the structural zone as a synclinorium composed of the Tundra and Pechenga series of the Lower and Middle Proterozoic. The rocks of the Pechenga series, composing the core of the structure, are represented by a sedimentary-volcanogenic complex consisting mainly of four complex effusive covers interspersed with sedimentary rocks. The most distinct among the sedimentary formations is the phyllite horizon, which hosts all the hyperbasite intrusions represented by serpentinites, peridotites and pyroxenites.

The materials of magnetic observations allow us to consider a number of new questions about the geological structure of the Kola Peninsula and the location of a number of minerals.On the maps of magnetic field plots of the AT, a large number of anomalies and anomalous zones, different in size, shape, intensity and character of the field, were identified. The geological nature of many of them is not in doubt and is easily established by comparing the magnetic field maps with detailed geological maps made on the basis of the study of the day surface and shallow excavations. Such material is insufficient for deciphering anomalies with more complex nature. These anomalies reflect the properties and composition of rocks both partially exposed on the day surface of the crystalline basement and magnetic masses embedded in the basement rocks, or are caused only by the latter. As usual, they are also divided into regional and local.