The Cu-Zn Obrazek ore deposit, Czechoslovakia: A volcanogenic deposit included in the Ransko intrusive complex

Laser ablation ICPMS study of trace element chemistry in molybdenite coupled with scanning electron microscopy (SEM) — An important tool for identification of different types of mineralization

“…Molybdenite rarely occurs in massive pyrite-pyrrhotite-sphalerite-chalcopyrite ore. The deposit was interpreted by Holub and Pokorný (1970) as epigenetic hydrothermal vein-style mineralization related to hydrothermal fluids associated with quartz-diorite magma, whereas Watkinson et al (1978) suggested it was a metamorphosed volcanogenic-type deposit. No age data are available from this deposit, but the nearby Jezírka Ni-Cu deposit yielded a Re-Os age of 341.5 ± 7.9 Ma (Ackerman et al, 2013).…”

Geochemistry and mineralogy of Platinum-group elements in the Ransko gabbro–peridotite massif, Bohemian Massif (Czech Republic)

“…12 (Sˇmejkal et al 1970). Conversely, the values from the Obra´zek deposit are characterized by a wider range (-6.4 to +1.2 &) suggesting most likely mixing of magmatic sulfur with that ingested from external sources (Watkinson et al 1978). Table 4 Microprobe analyses of (Fe-Ni) cobaltite -(Fe-Co) gersdorffite.…”

“…The intrusive complex and related ores were studied by Mı´sarˇ(1960), Pokorny´(1969), Hoffman (1962), Weiss (1962), Duda (1966), Rost (1969), Holub and Pokorny´(1970), Marek (1970), Mı´sarˇ(1960Mı´sarˇ( , 1974Mı´sarˇ( , 1979, Sˇmejkal et al (1970), Bousˇka et al (1977), Watkinson et al (1978) and, recently, also by Bernard (1991), Holub et al (1992), Van der Veen and Maaskant (1995), Vavrˇı´n and Fry´da (1998) and Pasˇava et al (1999). Findings of anomalous Platinum-group element (PGE) concentrations and subsequent identification of principal PGE carriers in the samples of Ni-Cu ores from the Jezı´rka deposit in the Ransko gabbro-peridotite massif are described in this paper.…”