Palaeogeography and sedimentary model of the Kupferschiefer in Poland

Carbon isotope stratigraphy of the basal Zechstein (Lopingian) strata in Northern Poland and its global correlation

“…-a fur ther shallowing of the sed i men tary ba sin (Gerlach and Knitzschke, 1978); -better cir cu la tion of the sea wa ter as a re sult of eustatic sea level changes (Smith, 1979;Peryt, 1984); -low er ing of the redoxcline be low the storm wave base due to a de crease in the sur face wa ter organic pro duc tiv ity (Paul, 1982;Oszczepalski and Rydzewski, 1987;Swee ney et al, 1987). It seems plau si ble that pulsed changes in sed i men tary condi tions caused by ver ti cal shifts in the redoxcline po si tion were of pri mary im por tance.…”

“…The Kupferschiefer oc curs across al most the en tire area ex cept for lo cal ero sional el e vations that be came loci of sed i men ta tion not ear lier than dur ing the later part of the Zechstein Lime stone which here over lies Si lu rian de pos its. Pre vi ous stud ies (Oszczepalski and Rydzewski, 1987;Oszczepalski, 1989) dis tin guished three micro lithofacies (termed a, b and c) in the Kupferschiefer basin. Microlithofacies (a) cor re sponds to lithotype 1 oc cur ring in the Marl Slate (Turner and Magaritz, 1986).…”

“…Microlithofacies (b), and microlithofacies (c) have no coun ter parts in the Marl Slate al though microlithofacies (c) shows some sim i lar ity to lithotype 1 of Turner and Magaritz (1986). Microlithofacies (b) com monly oc curs across al most the en tire Kupferschiefer ba sin (Oszczepalski and Rydzewski, 1987).…”

“…The (a) -or ganic-rich clayey shale with fine pla nar dis crete laminae com posed of clay (brown); abun dant dark ma trix; microsparitic lamine (white) and pos si ble skel e tal re mains are con cor dant with lam i na tion; sparse non-skel e tal grains (microsparitic pelletoids); (b) -lam i nated cal car e ous muddy shale with wavy and len tic u lar microsparitic laminae (dark brown); abun dant non-skel e tal grains (microsparitic pelletoids); (c) -or ganic-rich muddy shale with fine dis crete clay and car bon ate laminae and len tic u lar laminae com posed of fine-grained terrigenous ma te rial marlstones are poor in or ganic ma te rial (<1.5 wt.% C org ) and con tain scat tered microcrysts of euhedral py rite in low abundance (<1 vol.%) (Pašava et al, 2010). The Kupferschiefer se quence is usu ally com posed of three or two (full or re duced) cy cles that can be cor re lated throughout the Zechstein ba sin (Paul, 1982;Oszczepalski and Rydzewski, 1987); each cy cle con sists of black lam i nated clayey shales at the base and lam i nated marlstones at the top. In the Zdrada IG 8 bore hole, one full cy cle and a ru di men tary second cy cle (lim ited to sam ple 13a, Fig.…”

From the intra‐desert ridges to the marine carbonate island chain: middle to late Permian (Upper Rotliegend–Lower Zechstein) of the Wolsztyn–Pogorzela high, west Poland

“…The transgressive systems tract (TST) deposits corresponding to the first Zechstein sequence (PZ1) are represented by the Basal Conglomerate, the Basal Limestone grainstones (Peryt, 1989, with references) and by Kupferschiefer shales (Figure 9). During Kupferschiefer deposition, two palaeogeographical zones have been distinguished by Oszczepalski and Rydzewski (1987): deep shelf and shallow shelf. The deposition of the deep shelf facies was mostly within the anaerobic zone or near the transition into the dysaerobic zone.…”