In isostatic compensation regional models, the load (surface topography or subsurface) is supported by a material that presents a positive grade of rigidity. So, their conduct is alike to an elastic plate that bends to support the load.

Using gravity anomaly and topography data, I applied the isostatic response function (admittance) to a set of profiles, to find an average of elastic thickness for the main Argentina’s sedimentary basins, by GX (an Oasis Montaj Geosoft © modified version of the USGS algorithm to calculate the isostatic regional gravity from a topographic grid) inspection. I applied the Admmittance analysis,

(also known as isostatic response function, IRF) that was developed by Dorman and Lewis, 1970. The IRF "is the wave number parameter that modifies the topography so as to produce gravity anomaly” (Watts, 2001). This allows "expresses the dependence of the gravity anomaly on topography as a function ofseveral physical parameters (plate thickness, plate rigidity, density distribution) and wavelength". (Billen, 2001).

I am interesting to know how can I get the values of the EET not only as a 2D profiles, but also as a grid.

Let me share some examples in the figure that I am attaching.

Best wishes, Mario E. Sigismondi