The GRABLOX program computes the gravity anomaly of a 3-D block model. The model consists of a large super block, which is divided into smaller brick-like elements the size of which can vary. Each minor block is assigned an individual density value. For more information about 3-D block models, please, see the documentation of the BLOXER program, which is used to visualize and to maintain 3-D block models.
GRABLOX can be used both for forward and inverse modeling (inversion). The inversion method optimizes the density values or the height of the individual blocks so that the difference between the measured and the computed gravity data gets minimized. Alternative inversion method utilizes Occam's principle so that the roughness of the resulting model gets minimized as well. The distribution of the density values inside the resulting block model can then be used in geological interpretation. GRABLOX can be used both for (large-scale) regional studies and (small-scale) local studies.