Steps:
1. Look at the regional magnetics and gravity. Mark terrain boundaries

How to make shape files of terrain boundaries:
   • Geosoft  How to create and export a ...  

   • Geosoft  Importing shape file  

2. Map basement structures (thanks Abigail Ayikwei for this)

http://updates.geosoft.com/downloads/...

3. Calculate IGRF and remove from data

   • Geosoft  Calculating the IGRF values...  

4. Filter the data (RTP, AS, LP, HP, Tilt derivative) Calculate RTP or RTE first and then apply filters

   • Geosoft  Calculating RTP, Horizontal...  

   • Geosoft  11 Image Processing of Magn...  

5. Depth to basement estimates start with profiles instead of 2D

Free Euler deconvolution for profiles:
   • Euler Software  Potential field dept...  

6. Profile modelling Have other data to constrain your profiles

   • Geosoft  Using GMSYS for 2D magnetic...