A Novel Enhanced Total Gradient (ETG) for Interpretation of Magnetic Data

Edge detection techniques identify the horizontal extents of underground geological bodies and work well in association with magnetic as seismic data. Even though detected edges might not be a lithological contact, they offer first-hand information regarding various rocks that ultimately offers an extra argument for existing tectonics. Most edge enhancement depend either on gradient or total potential fields. As now, no single filter performance is best all conditions. The study proposes novel called “ETG-Enhanced Total Gradient” combines derivatives analytic signal (AS) (in third dimension). maximum amplitude AS less dependent direction magnetization critical mapping borders buried sources beneath Earth. ETG based field, there need to apply reduction pole process One limitation method unable perform better at corners where other conventional methods miserably failed. filter’s behavior examined validated using 2D 3D synthetic reliability by applying it data Seattle uplift region, USA. A new structural map region generated proposed filter. observed peak response correlated major tectonic features such Fault Zone (SFZ), Hood Canal (HCF), Dewatto (DF).