Radiocarbon and lead-210 age-depth model and trace elements concentration in the Wolbrom fen (S Poland)

Abstract

A one-meter long peat core was taken from the peatland in Wolbrom (Silesian-Cracovian Upland, southern Poland). The analysis of the botanical composition showed that Wolbrom is a fen. Vegetation species such as Carex rostrata and Phragmites australis have been found. An age-depth model was constructed using 12 conventional radiocarbon dates and 13 lead-210 dates from the upper part of the deposit. In this work, the results of radiocarbon dating are presented. According to the model, we can estimate the age of the fen. The oldest part comes from a depth of 1.05 meter and its conventional age is 5940 ± 95 BP (modelled date 5000-4790 BC, 68.2% probability interval). The accumulation rate varies between approximately 0.53 mm·yr -1 and 6.48 mm·yr -1 .The core has been also tested for the presence of trace elements (Co, Cr, Cu, Fe, Mn, Ni, Pb, Zn) using ICP-OES. There are considerable variations in the concentrations of the tested metals -in many cases the concentration starts to rise at about 40 cm and may be connected with the human activity. This depth corresponds to the modelled age intervals 355-300 BC (17.4%) and 205-45 BC (50.7%).

Reconstruction of atmospheric lead and heavy metal pollution in the Otrębowskie Brzegi peatland (S Poland)

“…The up per 20 cm of the cores were also dated by mea sur ing 210 Pb ac tiv ity us ing al pha spec trom e try (Sikorski and Bluszcz, 2008). De tails of prep a ra tion and mea sure ment meth ods for both ra dio car bon and 210 Pb dat ing are de scribed in Pawe³czyk et al (2017). In or der to build the fi nal age-depth model, 14 C and 210 Pb data were cal i brated and ana lysed us ing OxCal soft ware (Bronk Ramsey and Lee, 2013) with the cal i bra tion data set of the IntCal13 (Reimer et al, 2013) and Bomb13 NH1 cal i bra tion curves (Hua et al, 2013).…”

“…This study is part of a larger work, includ ing com par a tive anal y sis of two peatlands in South ern Poland -Otrêbowskie Brzegi and Wolbrom. These peatlands dif fer in terms of lo ca tion, li thol ogy and anthropogenic im pact (see Pawe³czyk et al, 2017Pawe³czyk et al, , 2018aPawe³czyk et al, , 2018b. In this study we in ves tigated a core from the Otrêbowskie Brzegi poor fen, lo cated in the Orava-Nowy Targ Ba sin.…”

Mercury in the sediments of selected peatlands in Małopolska region

“…This is probably because the east--west-oriented Wolbrom Gate is well ventilated by the prevailing westerly winds. Accordingly, the heavy metal contents here are not too high (Pawełczyk et al 2017), and for Ni, Cr and Cu generally do not exceed natural background values (Pawełczyk et al 2018). In this peat bog, in contrast to the others in Małopolska and other areas of Europe, mercury reaches its peak concentrations in the 0-1-cm surface layer.…”

“…Palynological and chronostratigraphic studies have shown that peat sedentation lasted from the Older Dryas to modern times here, with a clear break in the Subboreal (Latałowa 1976;Latałowa, Nalepka 1987). The latest radiocarbon datings of the top layer of bog sediments from the W3 profile (Pawełczyk et al 2017(Pawełczyk et al , 2018 show undisturbed peat sedentation in the age range of 5000-150 BC, i.e. from a depth of 105 to 40 cm, whereas the radiocarbon age of the peat samples is ambiguous above 40 cm but, in conjunction with 210 Pb age determinations, indicates a hiatus in AD ~750 to ~1850.…”

Considering lacustrine erosion records and the De Ploey erosion model in an examination of mountain catchment erosion susceptibility and precipitation reconstruction

“…Pb dating techniques described in (Doyen et al, 2016;Simonneau, 2012;Simonneau et al, 2013b Pb results an age-date model (CLAM and/or CRS) (Blaauw, 2010;Pawełczyk et al, 2017;Sikorski, 2019) was created for each core from which top sample (for the spatial dataset) and total core samples (for the temporal dataset) ages and time steps were derived ( Table 2).…”