TY - JOUR A1 - Botor,D. T1 - Burial and thermal history of the Intra-Sudetic Basin (SW Poland) constrained by 1-D maturity modelling - implications for coalification and natural gas generation JF - Bulletin of Geosciences JA - Bull. Geosci. Y1 - 2020 VL - 95 IS - 4 SP - 497 EP - 514 CY - Prague PB - Czech Geological Survey SN - 1803-1943 (online), 1802-6222 (print) AV - Free KW - Variscides KW - Bohemian Massif KW - Carboniferous KW - maturity modelling KW - coalification KW - vitrinite reflectance AB - Kinetic maturity modelling was performed using publicly available vitrinite reflectance data, for nine well sections in the Intra-Sudetic Basin (NE part of the Bohemian Massif) in order to reconstruct its burial and thermal history. The modelling results indicate that the Carboniferous strata reached maximum palaeotemperatures of c. 100-260 °C in the latest Carboniferous to early Permian. The Carboniferous-Permian magmatic activity must have contributed to high heat flow (c. 90-150 mW/m2 during the late Palaeozoic), adding to the effect of sedimentary burial (to a total depth c. 3-6 km in the early Permian), and caused the coalification of organic matter (c. 0.6-4.5% of vitrinite reflectance), and finally natural gas generation. Major hydrocarbon products were dominated by methane. The second phase of temperature rise occurred due to mainly Late Cretaceous sedimentary burial, but it had no effect on the maturation of the Carboniferous organic matter. ER -