Termalni historie vrtu Slusovice-1

The one dimensional model (1D) of thermal history and subsidence of the Slušovice-1 borehole was created in order to determine the thickness of missing units and determine temperature range reached during the Carpathian nappes thrusting. The reliability of the model was verified using vitrinite reflectance R_r [%] and the stabilized temperature measured during pumping tests as calibration parameters. The comparison of modelled and measured data (Fig. 4) provided good fit. The final 1D model represents gradual thrusting of the Miocenne infill alochthone part of the Carpathian Foredeep, comprising the Soláň, Beloveža and Zlín Formation on the autochthonous basement (Fig. 1) from 16.5 to 8 Ma (Picha et al. 2006). The Slušovice-1 borehole has specific maturation trend with depth and each individual nappe has own geothermal gradient and has to be modelled independently (Hantschel - Kauerauf 2008; Gusterhuber et al. 2013). The resulting thickness of the missing parts for Zlín Formation is 3 990 m, for Beloveža Formation is 3 990 m, and for Soláň Formation is 4 920 m. The heat flow (HF) scenario during strata sedimentation (Fig. 3) respect published geological concept presented in Picha et al. (2006). Maximum modelled HF 80 mW/m² was achieved during Paleozoic (Fig. 3). From that time the heat flow gradually decrease to 48 mW/m². Following thrusting of the Carpathians nappes decreased the HF values to 40 mW/m². The highest temperature ranging between 110 and 115 °C was achieved in bottom part of the Paleozoic floor at the depth of 4 600 m from 12 to 11 Ma (Fig. 5).

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