Velseis recently completed the re-processing of the Mawson 3D seismic survey for Legend Mining Limited (Legend). Feedback from Legend has indicated that the re-processing offers an improved visualisation and representation of Legend's geological models and understanding for Mawson based on hard data points from diamond and reverse-circulation drilling. The main differences between the re-processed data and the legacy data are the presence of the base-of-cover reflector in the reprocessing, the break in the Mawson Fault and fewer migration artefacts. Each of these differences to the legacy processing has given new insights into the structures daylighting at the base-of-cover as well as deeper project-scale structures which provide context to conceptualising a geological history of the Mawson Prospect. There is confirmation that the re-processed data better supports Legend's geological model and the inferred geological history compared to the legacy processing. More broadly, this case-study illustrates that with careful data processing, the seismic method can be employed in this context to add value to products traditionally used in minerals exploration.