Magnetization Vector Imaging for Magnetic Data using DEXP Method

The induced magnetization and the natural remanent magnetization comprise the total magnetization of the magnetic source. The magnetization vector provides essential information for interpreting the structure and remanent magnetization on subsurface rocks. We propose the vector imaging framework to recover the magnetization vector information from magnetic total field data based on the Depth from Extreme Points (DEXP) imaging. We prove that the total field anomaly imaging field will deviate from the true locations of the magnetic source in the presence of oblique magnetization. To mitigate the effects of oblique and remanent magnetization, DEXP imaging of transform modulus total magnitude anomaly (TMA) and normalized source strength (NSS) is jointly utilized within the vector imaging framework, generating images that approximate the true source distribution. The source images are endowed with magnetization properties and transformed into three components of the magnetic source through the solution of the magnetic vector equation, assuming uniform magnetization directions for isolated sources. The focusing function accelerates model convergence, refining the fit to the total field anomaly over multiple iterations.