The following model study and real data example illustrate the principles of 3-D magnetic inversion with focusing and compression. Upper panel shows model of a cube, middle panel shows model of a dipping slab, and lower panel shows model of a faulted dipping slab. The vertical sections of the true models. Upper panel shows a cube model, middle panel shows a dipping slab model, and the lower panel shows a faulted dipping slab model. Synthetic magnetic data for the models presented in Figure 1.
Upper panel shows data for a cube model with the vertical magnetization of the inducing field.
The smooth images provide useful information about the location and geometry of the models, but the images are diffused and unfocused, while the focusing inversion reconstructs very well the original models of the cube and the slab. The fault is practically invisible in the smooth image, while it can be clearly recognized in the sharp image. Red lines show the flight path. A map of airborne magnetic data. Red lines show the flight paths.