Paleoenvironmental conditions, source and maturation of Neogene organic matter from the siliciclastic deposits of the Orava-Nowy Targ Basin

Huminite reflectance and biomarker-based parameters, as well as the presence of unsaturated pentacyclic triterpenoids and steroids indicate an immature organic matter. A trend of decreasing maturation of sediments from east to the west was observed, as was a similarity of thermal maturity between the Podhale Synclinorium and the ONTB, although the latter seems to be coincidental. A thermal gradient value of 35 °C/km was assumed for calculating the maximum thickness of eroded strata, resulting in 1-1.6 km for the SE area and a maximum temperature of the deepest buried samples equal to 45-65 °C.