Hydromagnezit, brugnatellit a coalingit v minerální asociaci puklin serpentinitu z kamenolomu „U Pustého mlýna“ u Hrubšic, moldanubikum, západní Morava

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Acta Mus. Moraviae, Sci. Geol. 93 (2008), vydání 1–2, stránky 19–34
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Hydromagnesite, brugnatellite and coalingite in mineral assemblage of fissures in serpentinite, quarry „U Pustého mlýna“, Hrubšice, Moldanubian zone, western Moravia

Low-temperature fissure mineralization was found in the quarry “U Pustého mlýna” (the Hrubšice serpentinite body, Moravian Moldanubicum). It is formed by rare Mg-, Mg–Fe-hydrocarbonate minerals (hydromagnesite, artinite, brugnatellite, coalingite), followed by aragonite, brucite, dolomite and calcite. Two main stages of genesis have been recognised. The oldest stage of mineralization was relatively Fe-rich, with brugnatellite and coalingite (and brucite), the younger, more extensive Mg-rich stage, produced artinite and four types of hydromagnesite. The youngest minerals of fissures are calcite and dolomite, while the position of aragonite is unclear. Mineral assemblages have formed from low-temperature solutions, which were enriched in Mg2+, at pH ~ 9, with relatively low fugacity of CO2 and temperature lower then 44 °C.

Kontakt:

Ondřej Kovář, Department of Geological Sciences, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic; e-mail: kovarondra@centrum.cz
Zdeněk Losos, Department of Geological Sciences, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic; e-mail: losos@sci.muni.cz
Stanislav Houzar, Department of Mineralogy and Petrography, Moravian Museum, Zelný trh 6, 659 37 Brno; e-mail: shouzar@mzm.cz
Josef Zeman, Department of Geological Sciences, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic; e-mail: jzeman@sci.muni.cz

Citace
Kovář, O., Losos, Z., Houzar, S., Zeman, J., 2008: Hydromagnezit, brugnatellit a coalingit v minerální asociaci puklin serpentinitu z kamenolomu „U Pustého mlýna“ u Hrubšic, moldanubikum, západní Morava. – Acta Mus. Morav., Sci. Geol., 93, 1–2, 19–34 (with English summary)
ISSN: 1211–8796