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Article dans une revue

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

Guillaume Martelet 1 Eric Gloaguen 1, 2, 3 Arne Døssing 4, 5 Eduardo Lima Simoes da Silva 4, 5 Johannes Linde 6 Thorkild M Rasmussen 7 
3 Géodynamique - UMR7327
BRGM - Bureau de Recherches Géologiques et Minières (BRGM), ISTO - Institut des Sciences de la Terre d'Orléans - UMR7327 : UMR7327, INSU - CNRS - Institut national des sciences de l'Univers, UO - Université d'Orléans : UMR7327
Abstract : 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.
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https://hal-brgm.archives-ouvertes.fr/hal-03433948
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Soumis le : jeudi 18 novembre 2021 - 09:01:38
Dernière modification le : dimanche 26 juin 2022 - 10:13:43
Archivage à long terme le : : samedi 19 février 2022 - 18:20:19

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Guillaume Martelet, Eric Gloaguen, Arne Døssing, Eduardo Lima Simoes da Silva, Johannes Linde, et al.. Airborne/UAV Multisensor Surveys Enhance the Geological Mapping and 3D Model of a Pseudo-Skarn Deposit in Ploumanac’h, French Brittany. Minerals, MDPI, 2021, 11 (11), pp.1259. ⟨10.3390/min11111259⟩. ⟨hal-03433948⟩

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