**2.7 Autotracing of axes of magnetic field anomalies normalized to the pole**

This transformant is used to localize the axes of anomalies ΔТа (**Figure 3**) in order to identify faults, the presence of which is determined: a) by a sharp change in the intensity of the magnetic field along certain lines and b) by characteristic shifts of anomalous values relative to this line [6].

The axes of key anomalies help to distinguish the margin zone of Assakeaudan Depression, where the contact of which with Shakhpakhty Tectonic Step is revealed by a narrow boundary.

Minimal variations were observed in the auto-tracing of the axes of the geomagnetic field anomalies, which were normalized to the pole, in the Assakeaudan depression (0.5 + 1 standard units). In contrast, intermediate values were found at the Shakhpakhty step (+0.5 to 3 standard units). The maximum values were established within the Central Ustyurt system of dislocations (5 standard units), which is probably due to the involvement of this regional structure in the Late Paleozoic tectogenesis (**Figure 3**).
