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Antimony quartz and antimony-gold quartz veins from northern Portugal
Neiva, A. M. R.; András, P.; Ramos, J. M. F.Antimony- and Pb-Sb-quartz veins from the Bragança district, Portugal, are mainly hosted by Silurian phyllites. Antimony-Au-quartz veins from the Dúrico-Beirã region are mainly hosted by a Cambrian schist-metagraywacke complex, as well as Ordovician phyllites and quartzites. The deposits were mostly exploited in the late 19th Century. Mineralogical characteristics and chemical compositions of individual ore min...
Data: 2008
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Origem: Estudo Geral - Universidade de Coimbra
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