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- Variability of detrital zircons from beaches and rivers in the western Algarve Region-South PortugalPublication . Rodrigues, Bruno; Moura, Delminda; Machado, Nuno; Veiga-Pires, C.Zircon is a common accessory mineral in most rocks and sediments, and although it is ubiquitous, it possesses a considerable petrologic interest. In the scope of CHYNA project, some samples of detrital sediments have been collected in rivers and beaches from Western Algarve region. The present work presents the results of the analyses undergone with the intent to document the existing zircons’ variability in these samples. The zircons from 22 samples have been analysed based on their shape, colour and inclusions. There is predominance of rounded and subrounded grains, generally colourless and without inclusions. Systematic differences between beaches and rivers are not observed, indicating that both environments have the same zircon sources.
- Investigações sobre a proveniência dos minerais pesados de ribeiras do Algarve OcidentalPublication . Rodrigues, Bruno; Fernandes, Paulo; Machado, Nuno; Veiga-Pires, C.Na região Oeste do Algarve as principais unidades litológicas aflorantes são constituídas por grauvaques, quartzitos e xistos argilosos do Paleozóico Superior, destacando-se, também, o sienito nefelínico de Monchique datado do Cretácico Superior e formações sedimentares Mezo- Cenozóicas.