A New 3D Geological Model for the Neves-Corvo Mine Region, Iberian Pyrite Belt, Portugal

Summary Three- and four-dimensional geological models provide important means for mineral exploration as they help to unravel the tectonic and depositional history of an area. They also serve to outline alteration zone patterns, establish ore-bearing fluid migration paths and identify potential areas for the deposition of minerals in economic concentrations. Geological models serve as constraints within the geophysical modelling process and contribute in the generation of new targets for exploration. In this work, we present a new 3D geological model of the Neves-Corvo mining area in the Iberian Pyrite Belt, Castro Verde, Portugal. The model provides higher resolution insight into a subsample of an area previously modelled using an updated (4D) geoscience data catalogue. The 3D model has been built using extensive ground-loop electromagnetic and seismic reflection data acquired by Lundin Mining, more than 1,000 surface drill-holes, 7,000 underground drill-holes, as well as updated geological cross-sections and surface geology data. Gravity and magnetic data were also used qualitatively to assess the model. The result is an explicit 3D model with a considerable level of detail honouring all available data which may be used for further mineral exploration.