hyDROCaRbONs IN The UPPeR PeRMIaN Pz1-Pz2 CyCLes OF the KłOdawa Salt StRUCtURe, CeNtRal pOlaNd

摘要: Organic geochemical studies were carried out on the sulphate-shale-carbonate series, representing upper PZ1 and lower PZ2 sections of Zechstein cycles in Klodawa Salt Structure, located central part Basin, Poland. Hydrocarbons extracted from Na1 Na2 rock salts, A1g A2 anhydrites, Ca2 dolomitic anhydrite T2 shale-carbonate rocks analysed by gas chromatography mass spectrometry (GC-MS). Homological series n-alkanes chained isoprenes indicate algal nature organic matter with characteristic chemiistry type II kerogen deposited under anoxic conditions. The molecular composition other biomarkers (n-alkylbenzenes, steranes) as well phenenthrene dibenzothio- phene their methyl derivatives revealed highest maturity hydrocarbons (level advanced stage oil-window zone) Stinking Shale. In adjacent beds, a gradual decrease maturi- ty was observed both upwards downwards stratigraphic sequence. main source is represented Shale deposits. trend vertical variation through profile explained resulting continuous migration hydrocarbons, expelled during maturation into underlying overlying strata.