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Silver mineralization at the Vale das Gatas tungsten mine, Portugal

Published online by Cambridge University Press:  05 July 2018

O. Gaspar ,
J. F. W. Bowles  and
T. J. Shepherd
O. Gaspar
Affiliation:
Laboratório da Direcção-Geral de Geologia e Minas, 4465 S. Mamede de Infesta, Portugal
J. F. W. Bowles
Affiliation:
Micro-Analysis Consultants Ltd., Unit 3, Edison Road, St. Ives, Cambridgeshire PE17 4LF, England
T. J. Shepherd
Affiliation:
British Geological Survey, 64-78 Gray's Inn Road, London WC1X 8NG
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Abstract

The Vale das Gatas tungsten mine is situated at the contact between Hercynian granite and Cambrian-Precambrian crystalline schists a few kilometers north of the village of Sabrosa, near Vila Real, in northern Portugal. Wolframite has been the principal product of the mine although several other metals of economic interest are known to occur there. The silver content of the ores was attributed by earlier workers to the presence of tetrahedrite and schapbachite, whilst this work shows matildite, pavonite, acanthite, and argyrodite to be present, together with Ag-bearing galena. The textures and compositions of these phases are described with preliminary results of fluid inclusion studies.

Keywords

silvertungstenPortugalVale das Gatasmatilditepavonitegalena

Information

Type
Mineralogy
Information
Mineralogical Magazine , Volume 51 , Issue 360 , June 1987 , pp. 305 - 310
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1987

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