Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.9/837
Título: Germanium-rich chalcopyrite from the Barrigão remobilised vein deposit, Iberian Pyrite Belt, Portugal
Autor: Reiser, Fiona K. M.
Guimarães, Fernanda
Pinto, Álvaro M. M.
Matos, João Xavier
Carvalho, João R. S.
Oliveira, Daniel P. S.
Rosa, Diogo R. N.
Palavras-chave: Depósitos minerais
Germânio
Calcopirite
Cobre
Barrigão (Concelho de Almodôvar, Portugal)
Faixa Piritosa Portuguesa
Data: 2009
Citação: Reiser, Fiona K. M.; Guimarães, Fernanda; Pinto, Álvaro M. M.; Matos, João Xavier; Carvalho, João R. S.; Oliveira, Daniel P. S.; Rosa, Diogo R. N. - Germanium-rich chalcopyrite from the Barrigão remobilised vein deposit, Iberian Pyrite Belt, Portugal. In: Smart Science for Exploration and Mining, Vol. 2, p. 424-426
Resumo: Anomalously high germanium contents have been detected by means of whole-rock trace element analysis in remobilised vein type copper ores from the abandoned Barrigão mine, located in the Iberian Pyrite Belt, southern Portugal. The late-Variscan brecciated copper ores consist manly of chalcopyrite, with minor tennantite, rare pyrite and arsenopyrite. The ores, investigated for elements increasingly used in several thin-film and other semiconductor high-technology applications (e.g. indium, selenium, tellurium and germanium), show germanium contents up to 280 ppm, with an average of 61 ppm from 10 samples. Electron Probe Microanalysis of Barrigão ore samples revealed that germanium is contained in chalcopyrite, with a range of 0.1 to 0.4 wt% (0.23 wt% average). High germanium contents seem to be linked to "dirty" chalcopyrite phases, showing irregular patchy zoning under the microscope and on back-scattered electron images.
URI: http://hdl.handle.net/10400.9/837
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