Airborne/uav multisensor surveys enhance the geological mapping and 3d model of a pseudo‐skarn deposit in ploumanac’h, french brittany

Taking advantage of a multi‐sensor (multispectral and magnetic) drone survey, we ad-dress the detailed geological mapping and modeling of a mineralization in its geological environ-ment. We stress that these high‐resolution data allow us to bridge the gap between field observations and a regional aeromagnetic survey.

On the one hand, the combination of multispectral im-agery with field geological observations enhances detailed geological mapping. On the other hand, the combination of field magnetic susceptibility measurement and their use in detailed to regional magnetic modeling, constrained respectively by UAV‐borne and airborne magnetic surveys, allows deriving a model of the mineralization consistent across the scales.

This is demonstrated in a case study in a complex polyphased magmatic‐metamorphic environment on the coast of French Brit-tany. The target area hosts a pseudo‐skarn mineralization, exhibiting an outstanding magnetic anomaly. The combination of remotely sensed and field data allows deriving a realistic conceptual and geometrical model of the magnetic mineralization in its geological environment, tightly constrained by field observations and measurements.