Airborne/UAV Multisensor Surveys Enhance the Geological Mapping and 3D Model of a Pseudo-Skarn Deposit in Ploumanac’h, French Brittany

Minerals

Eric Gloaguen¹  Guillaume Martelet¹  Eduardo Lima Simoes da Silva²  Arne Døssing²  Thorkild M. Rasmussen³  Johannes Linde⁴ 

[1] Bureau de Recherches Géologiques et Minières (BRGM), F-45060 Orléans, France;CMAGTRES, Geomagnetism, DTU Space, Technical University Denmark, Centrifugevej 356, DK-2850 Kgs. Lyngby, Denmark;Department of Civil, Environmental and Natural Resources Engineering, Luleå Technical University, 971 87 Luleå, Sweden;Geodesy and Earth Observation, DTU Space, Elektrovej 328, DK-2850 Kgs. Lyngby, Denmark;

关键词: pseudo-skarn;    airborne geophysics;    magnetic modelling;    drone;    UAV;    multispectral image;   

DOI  :  10.3390/min11111259

来源: DOAJ

【 摘 要 】

Taking advantage of a multi-sensor (multispectral and magnetic) drone survey, we address the detailed geological mapping and modeling of a mineralization in its geological environment. 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 imagery 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 Brittany. 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.

【 授权许可】

Unknown