Authigenic Sanidine as a Mineral Indicator of Gravitation-Brine Catagenesis in Carboniferous Rocks in the Southern Limb of the Moscow Syneclise

2020 ◽  
Vol 55 (3) ◽  
pp. 192-205
Author(s):  
Yu. V. Yashunskii ◽  
S. A. Novikova ◽  
V. K. Golubev ◽  
I. A. Novikov ◽  
A. A. Kiselev ◽  
...  
Keyword(s):  
Moscow Syneclise

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

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.

Potencial of rock-magnetic methods in paleoecological reconstructions: case study of Mikhailovtsement reference section (Ryazan region)

2019 ◽  
pp. 30-38
Author(s):  
I. A. Stepanov ◽  
A. Yu. Kazansky ◽  
D. N. Kiselev ◽  
L. R. Kosareva ◽  
M. A. Rogov ◽  
...  
Keyword(s):  
Sea Level ◽  
Basin Evolution ◽  
Sea Level Fluctuations ◽  
Level Change ◽  
Magnetic Methods ◽  
Moscow Syneclise ◽  
Global Trend ◽  
Paleoecological Reconstructions ◽  
Reference Section

On the basis of detailed, combined rock-magnetic, lithological, and micropaleontological study of the Mikhailovtsement section of the Moscow syneclise (Ryazan region), the fluctuations in Central Russian Sea level in Callovian–Early Oxfordian were reconstructed. According to the variations of rock-magnetic parameters over the section, seven rock-magnetic intervals were established which correspond to different stages of basin evolution. These stages are compared with sea level fluctuations established on the basis of changes in the lithology of rocks and the ostracod complexes. In general, the nature of sea level change in Callovian–Oxfordian, revealed by combination of the methods during the study of Mikhailovtsement section coincides with global trend.

scholarly journals Supplemental Material: Radioisotopic and biostratigraphic constraints on the classical Middle–Upper Permian succession and tetrapod fauna of the Moscow syneclise, Russia

2020 ◽  
Author(s):  
V.I. Davydov
Keyword(s):  
Upper Permian ◽  
Isotopic Data ◽  
Moscow Syneclise ◽  
Single Grain

Figures S1–S4 (photos, stratigraphic logs, stratigraphy, and results of single grain chemical abrasion ID-TIMS analysis) and Tables S1 and S2 (fossils, and U-Pb isotopic data).<br>

scholarly journals A vertical water exchange of the groundwater in the central part of Moscow artesian basin

2017 ◽  
pp. 30-34
Author(s):  
N. V. Fisun
Keyword(s):  
Water Exchange ◽  
Upper Devonian ◽  
Piezometric Level ◽  
Lower Carboniferous ◽  
Artesian Basin ◽  
Underground Waters ◽  
Pressure Surface ◽  
Moscow Syneclise ◽  
The Difference ◽  
Subterranean Waters

The hydrogeological features of the central part of the Moscow artesian basin (MAB) under the natural conditions provided the existence of the downward vertical flows of the groundwater, the formation of the fresh underground waters of the Carboniferous complex, desalination of the Upper Devonian subterranean waters. The long exploitation of the Aleksin-Protvino horizon in the central part of the MAB led to the formation of a depression of the piezometric level with a depth of 80 m, as well as a change in the ratio of the absolute marks of the piezometric surfaces of the groundwater of the Lower Carboniferous and the Upper Devonian, and the creation of prerequisites for the changing of the orienfafion of the vertical wafer exchange between them. A map of the difference in pressures between the Aleksin-Protvino and the Upper Devonian horizons, compiled by the author, shows this situation. In a vast zone of the central part of the MAB, the pressure surface of the Alexin-Protvino horizon is 30-50 m below the upper Devonian horizon. Under these conditions, it seems important to study the Upper Devonian aquiferous complex as a possible source of the «contamination» of the groundwater of the Lower Carboniferous, especially in the zones of active lineaments of the Moscow syneclise.

Radioisotopic and biostratigraphic constraints on the classical Middle–Upper Permian succession and tetrapod fauna of the Moscow syneclise, Russia

Geology ◽  
2020 ◽  
Vol 48 (7) ◽  
pp. 742-747 ◽  
Author(s):  
V.I. Davydov ◽  
M.P. Arefiev ◽  
V.K. Golubev ◽  
E.V. Karasev ◽  
M.A. Naumcheva ◽  
...  
Keyword(s):  
East European Platform ◽  
Thermal Ionization Mass Spectrometry ◽  
Upper Permian ◽  
Ionization Mass ◽  
East European ◽  
Geologic Time ◽  
Permian System ◽  
Moscow Syneclise ◽  
Geologic Time Scale ◽  
Thermal Ionization Mass

Abstract The East European Platform and the PreUrals are the regions where the Permian System was first established, but the provincialism of fossils and lack of radioisotopic age control have prevented the use there of the regional Permian subdivisions used outside of the region. We report the first U-Pb zircon chemical abrasion–isotope dilution–thermal ionization mass spectrometry (CA-ID-TIMS) age of 253.95 ± 0.06 Ma for a volcanic tuff from the terrestrial upper part of the lower Vyatkian Regional Stage in the Moscow syneclise (Russia). This age greatly improves the correlation of the East European Platform and the PreUrals with the international geologic time scale, and contributes to our understanding of sedimentation within the Permian-Triassic transition in the studied region. The new radioisotopic age integrated within the regional chronostratigraphic framework reveals the synchrony in extinction of faunas of the Dinocephalian superassemblage in the studied region with that in South Africa.

Late Permian conchostracans (Crustacea, Branchiopoda) from continental deposits in the Moscow Syneclise, Russia

2018 ◽  
Vol 93 (1) ◽  
pp. 72-97 ◽  
Author(s):  
Frank Scholze ◽  
Valeriy K. Golubev ◽  
Grzegorz Niedźwiedzki ◽  
Joerg W. Schneider ◽  
Andrey G. Sennikov
Keyword(s):  
Late Permian ◽  
Future Studies ◽  
East European ◽  
Regional Stage ◽  
Taxonomic Description ◽  
Moscow Syneclise ◽  
Continental Deposits ◽  
New Material ◽  
The Rich

AbstractThe Moscow Syneclise on the East European Platform is an important area for the study of the continental biota of late Permian to Early Triassic age in continuous sections. This study attempts a taxonomic description of the late Permian conchostracan fauna of this area. The rich, new material was collected, bed by bed, during geological and paleontological excavations of lacustrine and fluvial deposits of the Obnora Formation and Vokhma Formation of the late Permian Zhukovian Regional Stage near the towns of Vyazniki and Gorokhovets. The conchostracan fauna of the Zhukovian Regional Stage consists predominantly ofPseudestheriaand less frequently ofPalaeolimnadiopsis. In the earliest Triassic Vokhmian Regional Stage, a more diverse fauna includingEuestheria,Magniestheria,Cornia,Palaeolimnadiopsis, andRossolimnadiopsiswas already recorded. The preliminary taxonomic determination of the pseudestheriids from the Zhukovian Regional Stage is intended to serve as a prerequisite for future studies of late Permian conchostracan biostratigraphy on the regional to interregional scale.

Sign in / Sign up

Export Citation Format

Share Document