P-T podmínky násunové deformace a charakter generovaných fluid v hádsko-říčských vápencích na Hádech u Brna

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Title in English P-T conditions of thrust deformation and the nature of derived fluids in the Hády-Říčka limestones at Hády near Brno
Authors

SLOBODNÍK Marek HURAI Vratislav PUDILOVÁ Marta KRÁL Ján

Year of publication 2004
Type Article in Periodical
Magazine / Source Geologické výzkumy na Moravě a ve Slezsku v r.2003
MU Faculty or unit

Faculty of Science

Citation
Field Geology and mineralogy
Keywords Moravian karst; Palaeozoic; quartz-calcite veins; P-T conditions; hydrocarbons
Description Variscan hydrothermal calcitešquartz veins have been investigated by microthermometric and isotopic methods (O, C, Sr). Veins are located in the Hády-Říčka Limestones within a black coloured shear-thrust zone in the Růženin quarry at the Hády Hill. Organic matter in rocks has been transformed and aqueous and organic fluids have been derived by deformation processes and elevated temperature. The coexistence of CH4šCO2 and H2O-NaCl fluids trapped in fluid inclusions enabled to calculate P-T trapping conditions and formation of hydrothermal phases. Revealed pressure and temperature represent local conditions within shear zone, T = 130 - 250C, P = 180-1200 bar. They exceeding regional parameters as a result of friction within rocks during a deformation event.
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