The spatio-temporal distribution of elements in the bottom sediments of Lake Onego and small lakes located on the catchment area of Onego Ice Lake

被引：0

作者：

Strakhovenko, Vera D. ^{[1
,2
]}

Belkina, Natalia A. ^{[3
]}

Efremenko, Natalia A. ^{[2
]}

Potakhin, Maxim S. ^{[3
,4
,5
]}

Subetto, Dmitry A. ^{[4
]}

Malov, Viktor I. ^{[1
,2
]}

Ovdina, Ekaterina A. ^{[1
]}

机构：

[1] Russian Acad Sci IGM SB RAS, Sobolev Inst Geol & Mineral, Siberian Branch, 3 Akad Koptyug Ave, Novosibirsk 630090, Russia

[2] Novosibirsk State Univ, 2 Pirogova St, Novosibirsk 630090, Russia

[3] Russian Acad Sci, Northern Water Problems Inst, Karelian Res Ctr, 50 Alexander Nevsky Pr, Petrozavodsk 185030, Russia

[4] Herzen State Pedag Univ Russia, 48 Moika Emb, St Petersburg 191186, Russia

[5] Petrozavodsk State Univ, 33 Lenina St, Petrozavodsk 185910, Russia

来源：

VESTNIK OF SAINT PETERSBURG UNIVERSITY EARTH SCIENCES | 2023年 / 68卷 / 04期

关键词：

Lake Onego; small lakes; Onego Ice Lake; bottom sediments; mineralogy; geochemistry; sedimentation rate; 210Pb; 137Cs; CHRONOLOGY; PB-210; CS-137;

D O I：

10.21638/spbu07.2023.404

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The work presents the results of a comprehensive mineralogical and geochemical study of Late Pleistocene-Holocene bottom sediments of Lake Onego and small lakes located in the territory belonging to Onego Ice Lake. Methods of ICP-MS, atomic absorption spectrometry, X-ray fluorescence analysis, X-ray phase method (XRD), scanning electron microscopy (SEM), and gamma-spectrometric method were used. The geochemical composition of the terrigenous fraction reflects the mineral composition and is permanent for the all bottom sediments cores of Lake Onego and small lakes during time interval about 12,000 years. For the first time, detailed mineralogical studies of sediments have shown that the composition of mineral associations of the terrigenous fraction is similar in the bottom sediment cores of Lake Onego and small lakes. The association of authigenic minerals in bottom sediments is distinguished by the presence of pyrite framboids in small lakes, and crystalline aggregates of Fe-phosphate, ferruginous illites and chlorites in Lake Onego. Sedimentation rates established by the study of correlations the indicator technogenic radioisotope 137Cs and atmospheric 210Pb. In the bottom sediments of small lakes, sedimentation rates vary from lake to lake, as well as in various areas of Lake Onego in the range from 0.05 cm/year to 0.30 cm/year.

引用

页数：25

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Belkina, Nataliya ;

Zobkov, Mikhail .

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