Variability in bothriolepid antiarchs(Placodermi) from the Main Devonian Field (East European Platform)

Dispersed bisaccate pollen grains of Scutasporites nanuki were studied by means of LM, SEM and TEM. Sacci ultrastructure of these pollen grains was rather peculiar. Sacci were like a thin fi lmy fringe attached to the central body near the equator. They were fi lled with sporopollenin elements of irregular shape and various dimensions with equally various cavities between them. Such an ultrastructure is called as spongy. The morphology and ultrastructure of S. nanuki is discussed in the context of the evolution of early conifers.

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The quasiplatform sediments of the East European Platform

Russian Journal of Earth Sciences ◽

10.2205/2005es000171 ◽

2005 ◽

Vol 7 (5) ◽

pp. 1-12

Author(s):

M. A. Nagornyi ◽

V. G. Nikolaev

Keyword(s):

East European Platform ◽

East European

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Nd isotope composition of the Ediacaran and earliest Cambrian phosphorite nodules and Fe sulphide from the East European Platform

Geological Magazine ◽

10.1017/s0016756820000497 ◽

2020 ◽

Vol 157 (12) ◽

pp. 2081-2088

Author(s):

Sergey B Felitsyn ◽

Eugeny S. Bogomolov

Keyword(s):

East European Platform ◽

Isotope Composition ◽

Water Reservoir ◽

Secular Change ◽

Early Cambrian ◽

Iron Sulphide ◽

Nd Isotope ◽

East European ◽

Moscow Syneclise ◽

Nd Isotope Composition

AbstractAn enhanced concentration of phosphorus has been found at the stratigraphic level of the disappearance of Ediacaran taxa in two areas, the Cis-Dniester region and the Moscow syneclise, on the East European Platform (EEP). The isotope composition of neodymium was determined in Fe sulphide and phosphorite in the same beds. Measured εNd(t) values in diagenetic phosphate nodules are similar to those in iron sulphide from the same layer. During the Ediacaran − Early Cambrian, accumulation of radiogenic Nd in the epeiric basins on the EEP increased progressively from −17.9 and −19.4 in pyrite from the sequence bottom to −7.9 and −8.5 in the Early Cambrian pyrite of the central part of the EEP. The Ediacaran phosphate nodules show εNd(t) ranging from −12.9 to −15.0, while that in the Early Cambrian nodules is typically c. −9.0. These data indicate the secular change in Nd isotope composition of the water reservoir on the EEP from Ediacaran to Cambrian.

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Carboniferous Raindrop Imprints at the Southwestern Margin of the East European Platform

Lithology and Mineral Resources ◽

10.1023/b:limi.0000033823.40511.f5 ◽

2004 ◽

Vol 39 (4) ◽

pp. 382-387 ◽

Cited By ~ 2

Author(s):

V. F. Shul'ga

Keyword(s):

East European Platform ◽

East European ◽

Southwestern Margin

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Erratum to: “Fragment of the Chemical Structure of Type II and II-S Kerogen in the Upper Jurassic and Upper Devonian Formations of the East European Platform”

Geochemistry International ◽

10.1134/s0016702910070116 ◽

2010 ◽

Vol 48 (7) ◽

pp. 737-737

Author(s):

N. S. Burdel’naya ◽

D. A. Bushev

Keyword(s):

East European Platform ◽

Chemical Structure ◽

Upper Jurassic ◽

Upper Devonian ◽

Type Ii ◽

East European

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Stratigraphic correlation of the Permian-Triassic red beds constrained by detrital zircon geochronology: Moscow basin, East European platform

10.5194/egusphere-egu21-10294 ◽

2021 ◽

Author(s):

Alvina Chistyakova ◽

Roman Veselovskiy

Keyword(s):

Detrital Zircon ◽

East European Platform ◽

Lower Triassic ◽

Detrital Zircons ◽

Upper Permian ◽

Stratigraphic Correlation ◽

Red Beds ◽

East European ◽

Moscow Basin ◽

Stratigraphic Position

There's no doubt that nowadays detrital zircon U-Pb geochronology is actually required method of sedimentary basins analysis. Furthermore, this approach may have a lot of applications, such as a stratigraphic correlation. Here we present the first results of U&#8211;Pb LA&#8211;ICP&#8211;MS dating of detrital zircon from the Permian-Triassic red beds located within the Moscow Basin of the East European platform. Two outcrops have been studied: the Zhukov Ravine P/T boundary reference section and the Nedubrovo strata with uncertain stratigraphic position (uppermost Permian or lower Triassic?).U&#8211;Pb ages of detrital zircon grains have been obtained for two samples &#8211; the Upper Permian and Lower Triassic age, which were taken in the proximity to the Permian&#8211;Triassic boundary in the Zhukov Ravine. Corresponding age distributions show contrasting provenance of the studied sedimentary rocks, pointing out that principal change in source of clastic material occurred on the Paleozoic-Mesozoic boundary. It means that detrital zircon U&#8211;Pb geochronology can be used as an additional independent tool for stratigraphic correlation of the Permian-Triassic red beds, at least within the Moscow Basin. We demonstrate this in the case of the Nedubrovo section with debated (Permian or Triassic?) stratigraphic position: the obtained data on detrital zircons persuasively suggests Early Triassic age of the Nedubrovo strata.This study is supported by the Russian Foundation for Basic Research (project no. 18-05-00593).

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A new sedimentary cover model for the southern area of the East European Platform and the Pre-Caucasus based on decompensation gravity anomalies data

10.5194/egusphere-egu21-15625 ◽

2021 ◽

Author(s):

Mikhail Kaban ◽

Alexei Gvishiani ◽

Roman Sidorov ◽

Alexei Oshchenko ◽

Roman Krasnoperov

Keyword(s):

East European Platform ◽

Sedimentary Cover ◽

Gravity Anomalies ◽

Sedimentary Basins ◽

The Caucasus ◽

Near Surface ◽

New Model ◽

Origin And Evolution ◽

East European ◽

Bouguer Anomalies

A new model has been developed for the density and thickness of the sedimentary cover in a vast region at the junction of the southern part of the East European Platform, the Pre-Caucasus and some structures adjacent to the south, including the Caucasus. Structure and density of sedimentary basins was studied by employing the approach based on decompensation of gravity anomalies. Decompensative correction for gravity anomalies reduces the effect of deep masses providing compensation of near-surface density anomalies, in contrast to the conventional isostatic or Bouguer anomalies. . The new model of sediments, which implies their thickness and density, gives a more detailed description of the sedimentary thickness and density and reveals new features which were not or differently imaged by previous studies. It helps in better understanding of the origin and evolution of the basins and provides a background for further detailed geological and geophysical studies of the region.

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