Lithology, biostratigraphy, and geochronology of the late pleistocene-holocene sediments on the coast of Onega bay of the White sea

2019 ◽  
Vol 485 (2) ◽  
pp. 221-225
Author(s):  
V. V. Kolka ◽  
O. P. Korsakova ◽  
N. B. Lavrova ◽  
T. S. Shelekhova ◽  
N. E. Zaretskaya
Keyword(s):  
Late Pleistocene ◽  
Bottom Sediments ◽  
Radiocarbon Dating ◽  
White Sea ◽  
The White Sea ◽  
Southeastern Part ◽  
Sedimentary Sequences ◽  
Onega Bay ◽  
Holocene Sediments ◽  
Sea Coast

This paper reports on the lithological, micropaleontological, and chronometric data (radiocarbon dating) for one of the areas of the White Sea coast. The sedimentary sequences were studied in the current lake basins, which were separated from the large basin at different times. The basin was situated in the head of the current Onega Bay. On the basis of these data, the bottom sediments were stratified and the Late Pleistocene-Holocene paleogeographic settings were reconstructed for the southeastern part of Onega Bay.

Lithology, Biostratigraphy, and Geochronology of the Late Pleistocene–Holocene Sediments on the Coast of Onega Bay of the White Sea

2019 ◽  
Vol 485 (1) ◽  
pp. 312-316
Author(s):  
V. V. Kolka ◽  
O. P. Korsakova ◽  
N. B. Lavrova ◽  
T. S. Shelekhova ◽  
N. E. Zaretskaya
Keyword(s):  
Late Pleistocene ◽  
White Sea ◽  
The White Sea ◽  
Onega Bay ◽  
Holocene Sediments

scholarly journals Diatoms in the Holocene sediments of the Tersky Сoast of the White Sea in connection with the history of its development in the postglacial time

2020 ◽  
pp. 1-16
Author(s):  
Elizaveta Agafonova ◽  
Yelena Polyakova ◽  
Fedor Romanenko
Keyword(s):  
White Sea ◽  
Ecological Groups ◽  
The White Sea ◽  
Southeastern Part ◽  
Temperature Changes ◽  
The Holocene ◽  
Holocene Sediments ◽  
History Of ◽  
Study Sites ◽  
The Right

This paper demonstrates the results of diatom analysis of the Holocene sediments from the southeastern part of the Tersky Coast of the White Sea. The main subject of the study is the diatom assemblages’ concentration and composition, as well as the ratio of the main diatom ecological groups in sediments. The study sites were located on the Tersky Coast from the village Chavanga to the right coast of the Varzuga River, at heights from 17 to 52 m. Our reconstruction of the Tersky Coast of the White Sea development is based on diatom study of Holocene sediments from three cores. Age was determined according to radiocarbon dating. In this work, the author determines the features of environmental development, starting from the first half of the early Holocene, clarified the age of the main transgressive stages - Folas, Tapes, Trivia and the absolute heights of their marine sediments. According to the changes in concentration and composition  of the main ecological groups of diatoms, the author records the significant trends in the water temperature changes in coastal reservoirs and hydrobiological conditions in the Holocene, such as short-term decrease in the temperatures of the end of Boreal and the first half of Atlantic time, the Holocene hydrobiological optimum, and changes in temperatures of the Subboreal and Subatlantic time.

Hydrological and hydrochemical research of the mouths of the small rivers flowing to the White sea in the winter low water season of 2019

2019 ◽  
Vol 59 (6) ◽  
pp. 1089-1092
Author(s):  
I. V. Miskevich ◽  
A. V. Leshchev ◽  
D. S. Moseev ◽  
A. S. Lokhov
Keyword(s):  
White Sea ◽  
Small Rivers ◽  
The White Sea ◽  
Hydrochemical Parameters ◽  
Catchment Basin ◽  
Onega Bay ◽  
Short Period ◽  
Tidal Estuaries ◽  
Hydrochemical Studies ◽  
River Mouths

In the winter low water season in March and the first week of April 2019, complex hydrological and hydrochemical studies were carried out at the mouths of two small rivers of the White Sea catchment basin (the Mudyuga river, which flows into the Dvina Bay, and the Tamitsa river, which flows into the Onega Bay). The results indicate significant differences in the short-period variability of hydrological and hydrochemical parameters in the winter in the studied river mouths compared with the characteristics observed in the tidal estuaries of large and medium rivers, as well as in the mouths of small rivers of the southern seas.

Multidisciplinary studies in Onega Bay of the White Sea and the estuary of the Onega River during the summer period

Oceanology ◽  
2008 ◽  
Vol 48 (2) ◽  
pp. 255-267 ◽  
Author(s):  
Yu. S. Dolotov ◽  
N. N. Filatov ◽  
V. P. Shevchenko ◽  
M. P. Petrov ◽  
A. V. Tolstikov ◽  
...  
Keyword(s):  
White Sea ◽  
The White Sea ◽  
Summer Period ◽  
Onega Bay ◽  
Multidisciplinary Studies

scholarly journals The Study of Uranium Accumulation in Marine Bottom Sediments: Effect of Redox Conditions at the Time of Sedimentation

Geosciences ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 332
Author(s):  
Nadezhda Khaustova ◽  
Yulia Tikhomirova ◽  
Svetlana Korost ◽  
Elena Poludetkina ◽  
Andrey Voropaev ◽  
...  
Keyword(s):  
Bottom Sediments ◽  
White Sea ◽  
Uranium Content ◽  
Black Shales ◽  
Redox Conditions ◽  
Source Rocks ◽  
Shelf Zone ◽  
The Black Sea ◽  
The White Sea ◽  
Run Off

To evaluate the effect of redox conditions at the sedimentation stage on uranium content and U/TOC ratio in marine source rocks, we analyzed the accumulation of uranium in modern marine bottom sediments formed in different redox conditions. The behavior of uranium from bottom sediments formed in oxidizing and sub-oxidizing settings has been studied on the sediments of the Upper Pleistocene–Holocene age accumulated in the coastal area of the White Sea (Kandalaksha Gulf). We studied the content of uranium, Eh, pH, TOC, C, H, N, and S element and isotope compositions and other parameters in two sampled columns of bottom sediments at a depth of 0–2.5 m. The composition of sediments was typical for the shelf zone where marine genesis mixes with the continental run-off. The upper layer of sediments (0–50 cm) were characterized by oxidizing conditions (Eh ~ 400 mV); with the increase in depth, redox conditions changed from oxidizing to reducing (0 ÷ 200 mV). The uranium concentration in the upper layer was 1–1.5 ppm, U/TOC ratio varied in the range of 0.8–1.1 ppmU/%TOC. The uranium content and U/TOC ratio increased up to the values of 2.6 ppm and 1.4 ppmU/%TOC at a depth of 0.5−2.5 m, respectively, but the general content of uranium in the studied environment was close to the values characterizing continental run-off. The results obtained for the White Sea sediments were compared with the sediment of the Black Sea, formed in the anoxic conditions of hydrogen sulfide contamination. In these conditions, the uranium content varied from 10 to 20 ppm. The obtained data were interpreted using thermodynamic modeling of the uranium forms in the seawater at different pH and Eh. This study demonstrated that the change of redox conditions from oxidizing to reducing leads to increased uranium content due to a decrease in uranium’s solubility in water. These results show that oxidation–reduction potential could be one of the most important factors controlling uranium content in black shales formed in the marine environment.

Occurrence Forms of Heavy Metals in the Bottom Sediments of the White Sea

2018 ◽  
pp. 241-270 ◽  
Author(s):  
Liudmila L. Demina ◽  
Dmitry F. Budko ◽  
Alexander N. Novigatsky ◽  
Tatiana N. Alexсeeva ◽  
Anastasia I. Kochenkova
Keyword(s):  
Heavy Metals ◽  
Bottom Sediments ◽  
White Sea ◽  
The White Sea

Comparative analysis of the microelemental composition of seston and bottom sediments in the White Sea

2006 ◽  
Vol 406 (1) ◽  
pp. 136-140 ◽  
Author(s):  
G. A. Leonova ◽  
V. A. Bobrov ◽  
V. P. Shevchenko ◽  
A. A. Prudkovskii
Keyword(s):  
Comparative Analysis ◽  
Bottom Sediments ◽  
White Sea ◽  
The White Sea ◽  
Microelemental Composition
Sign in / Sign up

Export Citation Format

Share Document