Autor(es): Morais, Igor ; Albardeiro, Luís ; Gonçalves, Pedro ; Soares, S. ; Solá, A. Rita ; Dias, Ruben Pereira ; Ressurreição, Ricardo ; Castro-Pina, M. ; Serra, B. ; Pereira, Zélia ; Mendes, Márcia
Data: 2023
Identificador Persistente: http://hdl.handle.net/10400.9/4122
Origem: Repositório do LNEG
Assunto(s): Geologic mapping; Photogrammetry; 3D modeling; Railway works; Cartografia geológica; Fotogrametria; Modelação 3D; Obras ferroviárias
SUMMARY: The follow up of new railway works, which will be part of the International South Corridor (Corredor Internacional Sul”, allowing the privileged access to new Ossa-Morena Zone outcrops, contributes to refine detailed geological mapping, as part of LNEG's mission. Along the different sections of the railway line, systematic geological sampling was carried out for petrographic, geochronological and paleontological studies. In addition, photographic record and three-dimensional modeling of the main slopes were performed using a drone. This methodology allows the construction of an information repository that can be consulted long after the works have been concluded and the outcrops become inaccessible. Besides the accuracy improvement of the geological contacts of the Ossa-Morena Zone rocks, the preliminary results confirmed the extent of Miocene debris flow sedimentation (conglomerates) and subsequent calcretization, and has identified new mineral occurrences.
