Open AccessCu(-Ag) mineralizace z Tismic u Českého Brodu (perm blanické brázdy, Česká republika)
Author(s) -
Zdeněk Dolníček,
Naďa Profantová,
Jana Ulmanová
Publication year - 2021
Publication title -
bulletin mineralogie petrologie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.239
H-Index - 10
eISSN - 2570-7345
pISSN - 2570-7337
DOI - 10.46861/bmp.29.197
Subject(s) - malachite , covellite , mineralization (soil science) , geochemistry , geology , mineralogy , bornite , permian , hydrothermal circulation , mineral , chalcopyrite , chemistry , copper , paleontology , organic chemistry , structural basin , soil science , soil water
A mineralogical study of samples newly collected from dump material at the formerly mined locality Tismice near Český Brod (central Bohemia) revealed the presence of covellite/yarrowite, acanthite, malachite and azurite. In addition, psammitic to aleuritic detrital material originated from host Permian sandstones/arkoses is a common compound of the studied ore samples. The Cu carbonates clearly prevail among ore minerals, whereas sulphide phases are accessories. The silver-enriched covellite/yarrowite, strongly replaced by malachite and azurite, has a coarse-grained texture implying that its primary hydrothermal or late hydrothermal origin cannot be excluded. The other recorded ore minerals are clearly supergene in origin. Although the nature of the mineralization from Tismice is in general similar to other occurrences of epigenetic vein Cu mineralization hosted by the Permian sediments in the vicinity of the town of Český Brod, the enrichment in silver is reported for the first time here.