Next Article in Journal
Geodynamic Evolution and Metallogeny of Archaean Structural and Compositional Complexes in the Northwestern Russian Arctic
Previous Article in Journal
Automated Acid Rock Drainage Indexing from Drill Core Imagery
Article Menu
Issue 12 (December) cover image

Export Article

Open AccessArticle

Selenium-Rich Ag–Au Mineralization at the Kremnica Au–Ag Epithermal Deposit, Slovak Republic

1
Department of Mineralogy and Petrology, National Museum, Cirkusová 1740, Prague 9, 193 00 Horní Počernice, Czech Republic
2
UK Mining Ventures Ltd., No. 1, The Old Coach Yard, East Coker; Somerset BA22 9HY, UK
3
Mining Museum Příbram, Hynka Kličky Place 293, Příbram VI, 261 01 Březové Hory, Czech Republic
*
Author to whom correspondence should be addressed.
Minerals 2018, 8(12), 572; https://doi.org/10.3390/min8120572
Received: 19 October 2018 / Revised: 30 November 2018 / Accepted: 1 December 2018 / Published: 4 December 2018
(This article belongs to the Section Crystallography and Physical Chemistry of Minerals)
  |  
PDF [14544 KB, uploaded 4 December 2018]
  |  

Abstract

Selenium-rich Au–Ag mineralization has been discovered in the Kremnica ore district, central Slovakia. The mineralization is hosted by a single quartz–dolomite vein hosted by Neogene propyllitized andesites of the Kremnica stratovolcano. Ore mineralogy and crystal chemistry of individual ore minerals have been studied here. The early base-metal ore mineralization composed of pyrite, sphalerite, and chalcopyrite lacks selenium, whereas the superimposed Au–Ag paragenesis is Se-enriched. The Au–Ag alloys, uytenbogaardtite, minerals of the galena–clausthalite series, acanthite–naumannite series, diaphorite, miargyrite, pyrargyrite–proustite, polybasite group, minerals of the tetrahedrite group and andorite branch (andorite IV, andorite VI, Ag-excess fizélyite), freieslebenite, and rare Pb–Sb sulphosalts (scaiinite, robinsonite, plagionite) have been identified here. Besides selenides, the most Se-enriched phases are miargyrite, proustite–pyrargyrite, and polybasite–pearceite, whose Se contents are among the highest reported worldwide. In addition, one new phase has been found, corresponding to a Se-analogue of pearceite containing 2.08–3.54 apfu Se. The style of mineralization, paragenetic situation, and chemical trends observed in individual minerals are comparable to those of Au–Ag low-sulphidation epithermal Au–Ag mineralizations of the Kremnica and neighboring Štiavnica and Hodruša-Hámre ore districts. However, the pronounced enrichment in selenium is a specific feature of the studied vein only. View Full-Text
Keywords: Au–Ag low-sulphidation epithermal mineralization; Kremnica; gold; selenides; Ag sulphoslats Au–Ag low-sulphidation epithermal mineralization; Kremnica; gold; selenides; Ag sulphoslats
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Supplementary material

SciFeed

Share & Cite This Article

MDPI and ACS Style

Števko, M.; Sejkora, J.; Dolníček, Z.; Škácha, P. Selenium-Rich Ag–Au Mineralization at the Kremnica Au–Ag Epithermal Deposit, Slovak Republic. Minerals 2018, 8, 572.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Minerals EISSN 2075-163X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top