New data on the age of the sedimentary infill of the Orava-Nowy Targ Basin – a case study of the Bystry Stream succession (Middle/Upper Miocene, Western Carpathians)

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

“…However, this scenario is not supported by the thermochronological investigations, which indicate that the maximum burial in the NW part of the Podhale Basin occurred between 15.8 and 17.1 Ma (Środoń et al, 2006). This is earlier than the onset of deposition in the ONTB that has recently been dated with UePb dating of zircons from a tuffite at~12 Ma (Wysocka et al, 2018). Thus, maximum burial and the subsequent partial erosion of the Podhale Basin must have occurred prior to sedimentation in the ONTB.…”

“…We cannot apply the paleogradient proposed by Środoń et al (2006) because it is close to the present-day value, while the gradient must have been somewhat greater during the Late Miocene, as there was active volcanism present in the area, especially within PKB and Magura Nappe, related to reactivation of fault zones formed earlier (Nejbert et al, 2012;Anczkiewicz and Anczkiewicz, 2016). Although there is no evidence of magmatic activity in the ONTB, except one tuffite layer (Łoziński et al, 2015;Wysocka et al, 2018), the presence of andesites in the tectonic units surrounding and underlying the ONTB suggests an overall elevated gradient in the region. The paleogradient estimated by Nagy et al (1996) is extremely high and may be overestimated, as discussed above.…”

“…Freshwater fauna, mainly snails, are rather infrequent in these deposits. Consequently, the age of sedimentation onset is still discussed and has been estimated to be Late Oligocene/Early Miocene (Watycha, 1976), Badenian (Oszast and Stuchlik, 1977) or Sarmatian (Nagy et al, 1996;Wysocka et al, 2018). Provenance studies of the basin infill revealed that detrital material was derived mainly from the Podhale and Magura Units.…”

“…One of the main strike-slip movements started during the Eggenburgian in the Vienna Basin and propagated towards the northeast, most likely leading to the formation of the ONTB (e.g., Tokarski et al, 2012). Sedimentation in the ONTB likely began around Badenian-Sarmatian, but an exact age is difficult to estimate, as there is no agreement on the age of the onset of sedimentation (Oszast and Stuchlik, 1977;Baumgart-Kotarba, 1996;Nagy et al, 1996;Wysocka et al, 2018). Subsidence ceased in the Pliocene and was followed by a partial uplift during the Late Pliocene, which persists (Vanko, 1988;Nagy et al, 1996;Baumgart-Kotarba, 2001;Tokarski et al, 2012;Łoziński et al, 2017).…”

Heavy Minerals as Indicators of the Source and Stratigraphic Position of the Loess-Like Deposits in the Orava Basin (Polish Western Carpathians)

“…The Magura Nappe covers the largest area and lies adjacent to the Pieniny Klippen Belt. It was folded between the Eocene [53] and the Miocene [54,55] (Figure 2). [22,23], Baumgart-Kotarba [25], and Chmielowska and Woronko [33]).…”