Litostratygrafia permu północno-wschodniego obrzeżenia Górnośląskiego Zagłębia Węglowego - nowa propozycja
Abstract
LITHOSTRATIGRAPHY OF THE PERMIAN NORTH-WEST OF THE UPPER SILESIA COAL BASIN - A NEW PROPOSAL
Summary
Terrigenous, coarse-grained clastic and volcanic Permian rocks occurring in north-eastern margin of the Upper Silesian Coal Basin (USC Basin) are traditionally included into the Rotliegend. Those deposits filled closed tectonic troughs named: Sławków Trough and Trzebinia- Nieporaz-Brodła (TNB) Trough, which makes difficulties for the lithostratigraphic correlations with neighbouring Permian basins. Palynological, petrographical and sedimentological data, enable to introduce a new proposal of informal lithostratigraphic units. Asumptions for distinguishing formations and members were presented. Myślachowice Formation with Karniowice Travertine Member and Sławków Formation represent lower part of the Lower Permian (Rotliegend). For the first time established Boleslaw Formation with Krzykawa Member and Tarnowskie Góry Member represent Upper Permian. Sedimentation of Permian deposits began in eastern part of the Lower Silesian Coal Basin (TNB Trough) and continued in space and time and displaced on north-eastern margin of the USC Basin. It maybe indicated process of depocenter migration evoked by tectonic movements of USC Basin crystalline basement. The total thickness of Permian molasse reaches 1000 meters, with considerable amount of Upper Permian red bed deposits (developed as Rotliegend lithofacies).
Summary
Terrigenous, coarse-grained clastic and volcanic Permian rocks occurring in north-eastern margin of the Upper Silesian Coal Basin (USC Basin) are traditionally included into the Rotliegend. Those deposits filled closed tectonic troughs named: Sławków Trough and Trzebinia- Nieporaz-Brodła (TNB) Trough, which makes difficulties for the lithostratigraphic correlations with neighbouring Permian basins. Palynological, petrographical and sedimentological data, enable to introduce a new proposal of informal lithostratigraphic units. Asumptions for distinguishing formations and members were presented. Myślachowice Formation with Karniowice Travertine Member and Sławków Formation represent lower part of the Lower Permian (Rotliegend). For the first time established Boleslaw Formation with Krzykawa Member and Tarnowskie Góry Member represent Upper Permian. Sedimentation of Permian deposits began in eastern part of the Lower Silesian Coal Basin (TNB Trough) and continued in space and time and displaced on north-eastern margin of the USC Basin. It maybe indicated process of depocenter migration evoked by tectonic movements of USC Basin crystalline basement. The total thickness of Permian molasse reaches 1000 meters, with considerable amount of Upper Permian red bed deposits (developed as Rotliegend lithofacies).