OR/18/004 Conclusions

Goodenough, K M, Jones, D, and Ford, J. 2018. Geological mapping of Sierra Leone: baseline assessment and next steps. British Geological Survey Open Report, OR/18/004.

This report provides a brief overview of the current state of geological knowledge in Sierra Leone. It is evident that baseline geological knowledge is highly variable across the country; some areas have been mapped in detail whilst others have not been mapped at all, and the existing maps are inconsistent in many respects. Most of the country completely lacks any modern description of geological structures or synthesis of known mineralisation. Modern geochronological information is also lacking, particularly in the basement supracrustal belts and late-tectonic granitoids, and in the Kasila Group. Sierra Leone is clearly in need of modern, nationwide geological mapping that follows international best practice with regard to naming of lithological units and identification of structural features.