Charakterystyka geochemiczna poziomów z fauną słodkowodną formacji z lublina z lubelskiego zagłębia węglowego

The most important part of the coal-bearing Carboniferous series is the Lublin formation (Lublin beds) (Westphalian A and B), where the main multi-seam coal deposits occur. Westphalian B is represented by a limnic series with are irregularly formed horizons of freshwater faunal. The paper presents the characteristics of horizons containing the remains of freshwater faunal from the boreholes: Borowo, Syczyn 7, Kulik, Kopina 1 (LCB). These horizons build claystones with layers or clay siderite concretions. For the analyzed horizons the content of the following elements: U, Th, V, Cr, Rb, K (ICP-MS) and oxides: Al₂O₃, SiO₂, P₂O₅, K₂O, MgO, CaO, Na₂O, K₂O, MnO, TiO₂, Cr₂O₃ (XRF) were determined. The most commonly ratios used in the identification of palaeoenvironment sedimentary were calculated (Th/U, Th/K₂O, V/Cr, P₂O₅/Al₂O₃, Rb/K). It was found that the content of elements U, Th, V, Cr, Rb K showed very similar values for claystones from borehole: Borowo, Syczyn 7, Kulik, while the sample from borehole Kopina 1 clearly lower value was observed. The research for all samples showed that those ratios such as: U, Th, Th/U, P₂O₅/Al₂O₃, V/Cr, Rb/K may be used to identify sedimentary environment and to geochemical correlations of the sedimentary rock sequences in the LCB.