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Publication
Integration of seismic, well, potential-field and geological data for ore prospecting in the Iberian Pyrite Belt
Advisor(s)
Abstract(s)
Ore prospecting using gravimetric and magnetic data has become one of the traditional approaches in
the last decades, often complemented with electric and electromagnetic methods. However, due to the
problem of non-uniqueness inherent to potential-filed modelling, constrains provided by structural
methods such as seismic reflection are often used. During the exploration of massive sulphide
polimetallic minerals in the Iberian Pyrite Belt Figueira de Cavaleiros sector, located in the Sado
Tertiary Basin, several gravimetric and magnetic anomalies were considered as interesting targets. In
order to reduce ambiguity of the gravimetric modelling and to confirm the geological model of the
area, two seismic reflection profiles were acquired. The interpretation of these profiles was assisted by
three mechanical boreholes, two of them located in the research area, in order to make a
seismostratigraphic interpretation. Unfortunately, the gravimetric modelling suggests that the anomaly
has a lithological and structural origin and is not related with massive sulphides. Nevertheless, a good
agreement between the seismic and potential-field data was achieved and new insights into the
geological model for the region were obtained form this work, with accurate data about the Tertiary
cover and Palaeozoic basement.
Description
Keywords
Geofísica aplicada Prospecção geofísica Gravimetria Anomalias geomagnéticas Refracção sísmica Sismostratigrafia Terciário Paleozóico Faixa Piritosa Ibérica
Citation
Carvalho, João; Sousa, Pedro; Matos, João Xavier; Pinto, Carlos - Integration of seismic, well, potential-field and geological data for ore prospecting in the Iberian Pyrite Belt. In: 72nd EAGE Conference & Exhibition incorporating SPE EUROPEC 2010, Barcelona, Spain, 14-17 June 2010