IDENTIFICATION OF TECTONIC LINEATION USING AIRBORNE MAGNETIC DATA IN ALBORZ, IRAN

Regarding the hypocenter of instrumental and historical earthquakes in southern Caspian basin, it is very important to recognize surface and deep faults to examine the risks and natural hazards. We decided to study the exact location of the tectonic lineation by interpreting the airborne magnetometer data in this region. Today airborne data play a unique role in tracking and studying processes occurring on earth due to appearance of magnetic field changes due to geological facies. This role is particularly pronounced in densely covered with alluvial and massive vegetation. The criterion for detecting magnetic lineation is the magnetic contrast in different images to define tectonic lineation as faults and shear zones. By applying different filters tectonic lineation are extracted the use of common filters provides the necessary information for the region’s qualitative interpretation of the data. The final aim and lineation extraction to interpret tectonism of the region is done by using two important filters named reduction to pole (RTP) and first vertical derivative (FVD) [1].