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Vol. 18 (2015 year), No. 2

Tolstobrov D. S., Tolstobrova A. N., Kolka V. V., Korsakova O. P.
Postglacial uplift of the Earth crust in the North-Western part of the Kola region

The new lithological, micropaleontological and chronological data received as a result of studying the lake bottom sediments sequences in a valley of the Tuloma River have been presented. Investigation of lakes situated in different areas of the Tuloma River valley at different elevations and their correlation with position of ancient marine coastal lines and forms has allowed recognizing the character of sedimentation and specific of neotectonic movements of the Earth's crust in the Late Glacial and Holocene in the North-Western part of the Kola region. The equidistant diagram of relative lines of the Earth's crust uplift has been presented for the studied area. The magnitude of the different-age uplift correlated to these lines, and uplift gradient along the valley of the Tuloma River and Kola Bay of the Barents Sea has been estimated

(in Russian, стр.12, fig. 7, tables. 1, ref 32, Adobe PDF, Adobe PDF 0 Kb)

Vol. 19 (2016 year), No. 1, DOI: 10.21443/1560-9278-2016-1/1

Tolstobrov D. S., Kolka V. V., Tolstobrova A. N., Korsakova O. P.
Experience of the chronological correlation of the Holocene sea coastal landforms in the Tuloma River valley and the Kola Bay

The paper is a continuation of studies of the Earth's crust neotectonic movements within the north-western part of the Kola region. New radiocarbon data of the lake bottom sediments in the Tuloma River valley allowed to modify diagram of the relative uplift lines of the Earth surface in the north-western part of the Kola region and to compare them with previously constructed epeirogenic spectra of coastal landforms for the study area. The dynamics and nature of the area uplift have been established and the dating of the ancient shorelines within the Tuloma River valley and the Kola Bay of the Barents Sea during the Holocene has been carried out

(in Russian, стр.0, fig. 0, tables. 0, ref 0, Adobe PDF, Adobe PDF 0 Kb)

Vol. 24 (2021 year), No. 1, DOI: 10.21443/1560-9278-2021-24-1

Chickiryov I. V., Tolstobrov D. S., Sorokhtin N. O., Nikiforov S. L., Melousov A. А., Ananiev R. A., Dmitrevsky N. N.
Lithological characteristics of modern sediments in the southwestern part of the Kara Sea shelf

In August – September 2020, during cruise 49 of the R/V Akademik Nikolay Strakhov, comprehensive geological, geophysical, hydroacoustic, geomorphological and hydrophysical research studies of the western segment of the Arctic zone within the Pechora and Kara Seas began in 2018–2019 were continued. As previously, the work was aimed at mapping the relief and modern sediments in order to assess the possible negative consequences of changes in natural conditions on the Arctic coast of the Russian Federation. The main purpose of the research was to assess the evolution of natural environments within the southwestern part of the Kara Sea shelf in connection with the observed global climate change in the Arctic, as well as with the expected increase in anthropogenic load on the Arctic shelf due to the development of oil and combustible natural gas fields. Bottom grab and a shock ground tube were used to obtain samples of recent sediments of the Kara Sea. The sampling sites were determined based on the analysis of data from bathymetric bottom survey and continuous seismic profiling. During the research, the boundaries of the distribution of various facies of bottom sediments within the southwestern part of the Kara Sea shelf have been clarified. The main feature of the modern bottom sediments in the southwestern part of the Kara Sea shelf is a wide areal distribution of thin facies – pelitic muds. Along the eastern and southern coasts of the Archipelago Novaya Zemlya, a distribution zone of iceberg sediments with a width of at least 150 km has been established. The formation of icebergs should be associated with the movement of the Novaya Zemlya cover glacier, formed 30–20 thousand years ago during the Sartan Ice Age. As the studies have shown, the general Holocene transgression in the Kara Sea was periodically replaced by short regressions, at least in the southwestern part of the basin.

(in Russian, стр.10, fig. 8, tables. 0, ref 9, AdobePDF, AdobePDF 0 Kb)