Germanium-rich chalcopyrite from the Barrigão remobilised vein deposit, Iberian Pyrite Belt, Portugal

F Reiser, F Guimarães, Á Pinto, JX Matos, J Carvalho, D Oliveira, D Rosa

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingspeer-review


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.
Original languageEnglish
Title of host publicationProceedings of the 10th Biennial Meeting of the Society for Geology Applied to Mineral Deposits
Place of PublicationTownsville
PublisherSociety for Geology Applied to Mineral Deposits (SGA)
Number of pages3
Publication statusPublished - 2009
Externally publishedYes

Programme Area

  • Programme Area 4: Mineral Resources


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