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Members of the freibergite–argentotennantite series and associated minerals from Silvermines, County Tipperary, Ireland

Published online by Cambridge University Press:  05 July 2018

Marek A. Zakrzewski
Marek A. Zakrzewski*
Affiliation:
Institute of Earth Sciences, Free University, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands
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Abstract

Ore microscope and electron microprobe investigations on Zn-Pb-Ag ores from B Zone in Silvermines, Ireland, have shown the presence of two As-Sb-Ag phases; a tetrahedrite-group mineral with composition Cu6.3Ag3.7Fe0.9Zn1.2As2.2Sb2.1S12.7 and proustite-pyrargyrite (Ag3As0.5Sb0.5S3). It is postulated that both phases inherited their As and Sb from primary geocronite (Pb14.5As3.4Sb2.6S23) and that they are metastable. An enrichment in Ni in the ores is due to very fine to submicroscopic intergrowths of gersdorffite (Ni0.6Fe0.4AsS) with geocronite and with galena.

Keywords

freibergiteargentotennantitetetrahedrite groupSilverminesIreland
Type
Non-silicate Mineralogy
Information
Mineralogical Magazine , Volume 53 , Issue 371 , June 1989 , pp. 293 - 298
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1989

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