Biostratigraphic and structural research in the Guedelhinha–Lançadoiras–Algaré sector in the context of the geology of the Neves–Corvo mine region, Iberian Pyrite Belt

•Devonian-Carboniferous sedimentation and paleoenvironments along the Iberian Pyrite Belt are analysed.•Several stratigraphic hiatuses are identified and confirmed in the Neves-Corvo region.•Palynostratigraphy is an important tool to define the age of the black shales hosting the mineralization.•IPB bioevents related to the major extinction event and environment changes are documented in the Devonian-Carboniferous Boundary.•Improvement of the stratigraphy of the IPB and geological knowledge.