The Carbon Isotope Composition of Organic Matter and the Age of Paleosols from Wurm Glaciations Interstadials to Holocene (Bryansk region, Russia)

3rd International Conference Environment and Sustainable Development of Territories: Ecological Challenges of the 21st Century

生态环境科学;地球科学;经济学

Stolpnikova, E.M.^1 ; Kovaleva, N.O.^1 ; Kovalev, I.V.^1

Lomonosov Moscow State University, Moscow, Russia^1

关键词: Bryansk region;    Carbon isotope composition;    High-content;    Holocenes;    Humid climates;    Interstadials;    Radiocarbon data;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/107/1/012123/pdf
DOI  :  10.1088/1755-1315/107/1/012123

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Paleosols of Trubchevsk district of the Bryansk region (Russia) lie in landscape with its own characteristic micro-relief, called Trubchevsk Opolye. The radiocarbon data have obtained for two interstadial soils: 16500 ± 230 Ki-17 414, 12930 ± 170 Ki-17 413 years ago. The ratio δ13Corg for underlying sandy pedosediments varies in range -26.5-27.2 %o characterizes relatively humid climate. The most lightweight carbon isotope composition (δ13C = -28.4-29.5 %o) measured for the Holocene second humus horizon, discovered in microdepressions of Trubchevsk opolye and dating (in its upper part) 2180 ± 60 Ki-17 415 BP, 1650±60 Ki-18775. It is characterized by a high content of phosphorus, including its strong accumulation of organic compounds (635.8 mg/kg P2O5).