New data on the Upper Devonian biostratigraphy and sedimentology of Stolb Island (Lena River delta)

Abstract

The obtained new data on conodonts, brachiopods, ammonoids, and ostracods from the Stolb Island section indicate the predominantly Early Famennian (triangularis–Lower rhomboidea Zones) age of sedimentation. The Upper Kellwasser global biotic event, which marks the Frasnian/Famennian boundary, has been distinguished for Arctic Siberia for the first time. It was found that carbonate-terrigenous sequences accumulated in basinal sedimentary environments. Fine-clastic material was supplied to the sediments from different sources. A flow of dolomite debris is associated with the most distant source—areas of evaporite sedimentation. The presence of calcareous fragments is due to destruction of skeletal material (close provenance areas). Siliciclastics, which make up a considerable part of the sediments, were produced by partial rewashing and eolian differentiation of felsic pyroclastics. The existence of organic-rich horizons and beds of well-washed and well-sorted clastic sequences suggests that the Upper Devonian sediments have a high general petroleum potential.

Frasnian-Famennian (Upper Devonian) transition in the northern hemisphere (NE Laurussia and NE Siberia) - an overview

“…This study is based on new and published lithological and palaeontological data from the East European Platform, northern Urals, PaiKhoi, the East Siberian Platform, and northeast Siberia (Pershina & Tsyganko 1980;Alekseeva et al 1996;Yudina et al 2002;Yolkin et al 2006;Ovnatanova & Kononova 2008;Zhuravlev 2008Zhuravlev , 2016Gagiev 2009;Yazikov et al 2013;Zatoń et al 2014;Zhuravlev et al 2015;Ovnatanova et al 2017). The new data comprises lithological and palaeontological (brachiopods and conodonts) information from the sections of the East European Platform (two sections) and PaiKhoi (two sections).…”

“…The Lena River section (71.953671° N,127.159098° E) represents a basinal facies with clayeycarbonate sedi mentation and increased palaeoseismicity (Yazikov et al 2013). The F-F boundary beds contain mixed carbo nate volcaniclastic deposits (Fig.…”

“…8). The terminal Frasnian and lowermost Famennian deposits yield numerous brachiopods (Krylova 1959(Krylova , 1962Yazikov et al 2013) (Appendix 2).…”

Devonian–Permian sedimentary basins and paleogeography of the Eastern Russian Arctic: An overview

“…4). The uppermost Permian succession comprises alternating tuff, tuffaceous sandstone and basalt flows up to 350 m thick (Pogrebitskiy and Lopatin, 1999a,b (Data sources: Grigorieva, 1983, 1986;Budnikova et al, 1991;Bulgakova, 1967;Egorov, 1993;Egorov and Andreev, 1981;Ershova et al, 2012Ershova et al, , 2014Gogina, 1979;Kalinko, 1953;Kontorovich et al, 2013;Matukhin, 1991;Matukhin et al, 1995;Menner and Sidyachenko, 1975;Mezhvilk and Markov, 1983;Pogrebitskiy and Lopatin, 1999a,b;Pogrebitskiy and Shanurenko, 1998a,b;Prokopiev et al, 2001;Proskurnin et al, 2013;Shishlov et al, 1997;Sobolev, 1997Sobolev, , 1999Solomina, 1997;Vanin et al, 2001;Yazikov et al, 2013).…”

“…The limestone contains a diverse assemblage of brachiopods, corals, bivalves and pteropods. The Famennian deposits are up to 400 m thick and comprise alternating calcareous sandstone and siltstone with subordinate marl and limestone (Gogina, 1979;Menner and Sidyachenko, 1975;Yazikov et al, 2013) (Fig. 4).…”