Sedymentacja osadów węglonośnej sukcesji Górnośląskiego Zagłębia Węglowego: kierunki badań i aktualny stan wiedzy

Abstract

Sedimentation of the coal-bearing succession in the Upper Silesia Coal Basin: research trends and the current state of knowledge.S u m m a r y. The coal-bearing succession in the Upper Silesia Coal Basin consists of molasse deposits filling a flexural foredeep basin. Analysis of lithofacies in cores from deep boreholes revealed the presence of depositional environments typical of alluvial plains and coastal (in a broad sense) environments. Accumulation compensated regional subsidence, so that general depositional surface remained nearly flat. The higher part of the succession was laid in fluvial systems, while the lower part mostly in fluvial systems and subordinately in complex coastal systems. Reconstruction of depositional architecture has shown lateral variation in thickness and extent of individual lithosomes, and also pointed to the role of peat-compaction control in shaping their 3D geometry. Sedimentation was controlled by both autigenic and allogenic factors.