5.2. Forward Modeling

Here the code gzfor3d_60.exe is used to forward model the gravity anomaly for the mesh and density contrast model provided. We consider a ground-based survey with a uniform station spacing of 40 m.

Files relevant to this part of the example are in the sub-folder fwd. We used the same model that was created in the create model section. Before running this example, you may want to do the following:

• Download and open the zip folder containing the entire grav3d example (if not done already)

• Learn how to run gzfor3d

• There is no input file

The resulting gravity anomaly (mgal) is shown below. According to the convention used by grav3d, a positive density contrast results in a positive gravity anomaly.