Late Permian aeolian sand seas from the Polish Upper Rotliegend Basin in the context of palaeoclimatic periodicity

Abstract

A study of a Permian aeolian depositional system in the Polish Upper Rotliegend Basin (PURB) is described and is placed in the wider context of similar studies of the German, Dutch and UK parts of the Southern Permian Basin (SPB). Aeolian complexes in the PURB consist of several stacked erg units inter-bedded with fluvial and playa deposits. These deposits are grouped into seven main units: six predominantly aeolian and one fluvial. The separate aeolian units were considered as representative of the changing pattern of palaeowinds directions. The correlations of wind mean directions assisted in the development of a new depositional model for part of the Eastern Erg aeolian complex within the PURB.

X-ray micro computed tomography characterization of porosity in Rotliegend sandstones on the northern slope of the Wolsztyn Ridge, western Poland

“…The flu vial F1 sand stones are sim i lar to the A2 sand stones, de spite their dif fer ent or i gins, and may in fact rep re sent flu vial sands which were re de pos ited by ae olian pro cesses dur ing dry pe ri ods. Sim i larly, some ae olian sands may have been re de pos ited by flu vial trans port dur ing wet pe ri ods (Kiersnowski et al, 2010b;Kiersnowski, 2013;Poszytek, 2014), and some flu vial and ae olian sand stones may there fore have sim i lar lithologies and po ros ity dis tri bu tions. By con trast, F2 sand stones are char ac ter ized by a higher ma trix con tent and poorer grain sort ing and, as a re sult, the po ros ity of these sand stones is very low.…”

“…In the Pol ish Perm ian Ba sin, Lower Rotliegend (Autunian) sed i men tary and vol ca nic rocks are over lain by Up per Rotliegend rocks de pos ited un der arid and semi-arid cli ma tic con di tions (e.g., Karnkowski, 1999;Kiersnowski et al, 2010b;Kiersnowski, 2013). Con ti nen tal Rotliegend sed i men ta tion was ter mi nated by the Zechstein ma rine trans gres sion and by Kupferschiefer sed i men ta tion (e.g., Jerzykiewicz et al, 1976;Peryt, 1976;Nemec and Porêbski, 1977;Karnkowski, 1986;Kiersnowski, 1997;Wag ner and Peryt, 1997;Michalik, 2001;cf.…”

Sand sheets interaction with aeolian dune, alluvial and marginal playa beds in Late Permian Upper Rotliegend setting (western part of the Poznań Basin, Poland)

“…5 and 9). In the study area, dune fields had mi grated from the east, north east and south-east, in ac cor dance with the di rec tion of pre vail ing winds (Kiersnowski, 2013), op po site of the di rec tion of prograding al lu vial de pos its (Fig. 24).…”

“…Thus, the de vel op ment of al lu vial fan de pos its was con trolled by up lifting and sub si dence along the tec tonic mar gin, and by the mi gration of ae olian dune fields, in a di rec tion op po site to the pro gradation of al lu vial fan de pos its (Kiersnowski, 2013;Figs. 26 and 29).…”

What can be learned from the K-Ar ages of illite from Rotliegend sandstones of the Fore-Sudetic Monocline, SW Poland?

“…1; Kiersnowski, 1997Kiersnowski, , 2013Kiersnowski et al, 2010a). The aeolian sand stones of the East ern Erg are up to 1000 m thick, whereas the ae olian sand stones of the South ern Erg reach 250 m in thick ness (Fig.…”