P-T podmínky násunové deformace a charakter generovaných fluid v hádsko-říčských vápencích na Hádech u Brna
| Title in English | P-T conditions of thrust deformation and the nature of derived fluids in the Hády-Říčka limestones at Hády near Brno |
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| Authors | |
| Year of publication | 2004 |
| Type | Article in Periodical |
| Magazine / Source | Geologické výzkumy na Moravě a ve Slezsku v r.2003 |
| MU Faculty or unit | |
| 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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