ISSN
print 2570-7337
online 2570-7345
Selenide mineralization of the uranium deposit Potůčky, Krušné hory Mountains (Czech Republic)
Keywords
Abstract
An interesting mineral association of Pb, Ag and Bi selenides was found in samples from the abandoned uranium deposit Princ Evžen near Potůčky in Krušné hory Mountains (Czech Republic). The unnamed Se-analogue of pavonite is the most abundant Se-bearing mineral phase. It forms anhedral aggregates up to 100 μm across and veinlets in chalcopyrite or coffinite in association with bohdanowiczite or unnamed Bi-selenide. Its empirical formula (mean of 97 analyses) can be expressed as (Ag1.15Cu0.02)Σ1.17(Bi2.74Pb0.13Fe0.01)Σ2.88(Se3.31S1.62Te0.01)Σ4.94. The minerals from the galena - clausthalite solid solution series are abundant as tiny (several μm) grains in coffinite, anhedral grains up to 50 μm in size in association with bohdanowiczite inclusions are much rare. Bohdanowiczite forms grains up to 30 μm in size in association with unnamed Se-analogue of pavonite, clausthalite and unnamed Bi-selenide. Its chemical composition (mean of 10 analyses) corresponds to the empirical formula (Ag0.99Fe0.02Pb0.01)Σ1.02Bi0.98(Se1.68S0.30Te0.01)Σ1.99. Unnamed Bi-selenide with ideal formula (Bi,Ag)3(Se,S,Te)4 was found as irregular grains up to 20 μm across in association with bohdanowiczite or unnamed Se-analogue of pavonite; its empirical formula (mean of 10 analyses) is (Bi2.62Ag0.30Pb0.04)Σ2.96 (Se3.11S0.74Te0.20)Σ4.05. The description and chemical composition of coexisting Se-free sulfides (chalcopyrite, pyrite, tennantite, sphalerite) are also given.
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References
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