Radiocarbon dating of organic-rich deposits: Difficulties of paleogeographical interpretations in highlands of Russian Altai

Abstract The high mountainous southeastern part of Russian Altai is characterized by complicated sedimentation history. As a result of tectonic movements, Paleogene, Neogene, and even more old Carboniferous and Jurassic organicrich deposits had been partly uplifted and exhumed on the ridge’s slopes,...

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Published in:Geochronometria
Main Authors: Nepop, R.K., Agatova, A.R., Bronnikova, M.A., Zazovskaya, E.P., Ovchinnikov, I.YU., Moska, P.
Format: Article in Journal/Newspaper
Language:English
Published: Walter de Gruyter GmbH 2020
Subjects:
Ice
Online Access:http://dx.doi.org/10.2478/geochr-2020-0018
https://content.sciendo.com/view/journals/geochr/47/1/article-p138.xml
https://www.sciendo.com/pdf/10.2478/geochr-2020-0018
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spelling crdegruyter:10.2478/geochr-2020-0018 2024-04-28T08:23:50+00:00 Radiocarbon dating of organic-rich deposits: Difficulties of paleogeographical interpretations in highlands of Russian Altai Nepop, R.K. Agatova, A.R. Bronnikova, M.A. Zazovskaya, E.P. Ovchinnikov, I.YU. Moska, P. 2020 http://dx.doi.org/10.2478/geochr-2020-0018 https://content.sciendo.com/view/journals/geochr/47/1/article-p138.xml https://www.sciendo.com/pdf/10.2478/geochr-2020-0018 en eng Walter de Gruyter GmbH http://creativecommons.org/licenses/by-nc-nd/3.0 Geochronometria volume 47, issue 1, page 138-153 ISSN 1897-1695 Earth and Planetary Sciences (miscellaneous) journal-article 2020 crdegruyter https://doi.org/10.2478/geochr-2020-0018 2024-04-02T06:57:15Z Abstract The high mountainous southeastern part of Russian Altai is characterized by complicated sedimentation history. As a result of tectonic movements, Paleogene, Neogene, and even more old Carboniferous and Jurassic organicrich deposits had been partly uplifted and exhumed on the ridge’s slopes, where during the Pleistocene, they were affected by various exogenous processes including glaciation, glacio-fluvial erosion, winnowing activity of ice-dammed lakes, sliding during lake-draining events, followed by further intensive Holocene erosion, pedogenesis, and permafrost formation/degradation. Remobilized ancient organic matter had been involved into geomorphic and pedogenesis processes and affected the results of radiocarbon dating. Numerous radiocarbon ages obtained revealed several typical problems in interpretation of dating results, which was confirmed by multidisciplinary investigations of associated sediments in a wider regional context. This article presents a discussion on obtained apparent radiocarbon dates of organic material from ten sections of the SE Altai. In addition to radiocarbon analysis, in each case multidisciplinary study was carried out in order to properly interpret obtained dates, as well as to explain the inability of directly using apparent 14 C ages as a geochronological basis for paleogeographical reconstruction. The analysis presented is of vital importance for establishing the chronology of formation of large ice-dammed lakes and their cataclysmic draining; revealing chronology and paleoenvironmental conditions of pedogenesis in the highlands of the SE Altai; and estimating the range and magnitude of the tectonically driven topography rebuilding in the post-Neogene time. Article in Journal/Newspaper Ice permafrost De Gruyter Geochronometria 47 1 138 153
institution Open Polar
collection De Gruyter
op_collection_id crdegruyter
language English
topic Earth and Planetary Sciences (miscellaneous)
spellingShingle Earth and Planetary Sciences (miscellaneous)
Nepop, R.K.
Agatova, A.R.
Bronnikova, M.A.
Zazovskaya, E.P.
Ovchinnikov, I.YU.
Moska, P.
Radiocarbon dating of organic-rich deposits: Difficulties of paleogeographical interpretations in highlands of Russian Altai
topic_facet Earth and Planetary Sciences (miscellaneous)
description Abstract The high mountainous southeastern part of Russian Altai is characterized by complicated sedimentation history. As a result of tectonic movements, Paleogene, Neogene, and even more old Carboniferous and Jurassic organicrich deposits had been partly uplifted and exhumed on the ridge’s slopes, where during the Pleistocene, they were affected by various exogenous processes including glaciation, glacio-fluvial erosion, winnowing activity of ice-dammed lakes, sliding during lake-draining events, followed by further intensive Holocene erosion, pedogenesis, and permafrost formation/degradation. Remobilized ancient organic matter had been involved into geomorphic and pedogenesis processes and affected the results of radiocarbon dating. Numerous radiocarbon ages obtained revealed several typical problems in interpretation of dating results, which was confirmed by multidisciplinary investigations of associated sediments in a wider regional context. This article presents a discussion on obtained apparent radiocarbon dates of organic material from ten sections of the SE Altai. In addition to radiocarbon analysis, in each case multidisciplinary study was carried out in order to properly interpret obtained dates, as well as to explain the inability of directly using apparent 14 C ages as a geochronological basis for paleogeographical reconstruction. The analysis presented is of vital importance for establishing the chronology of formation of large ice-dammed lakes and their cataclysmic draining; revealing chronology and paleoenvironmental conditions of pedogenesis in the highlands of the SE Altai; and estimating the range and magnitude of the tectonically driven topography rebuilding in the post-Neogene time.
format Article in Journal/Newspaper
author Nepop, R.K.
Agatova, A.R.
Bronnikova, M.A.
Zazovskaya, E.P.
Ovchinnikov, I.YU.
Moska, P.
author_facet Nepop, R.K.
Agatova, A.R.
Bronnikova, M.A.
Zazovskaya, E.P.
Ovchinnikov, I.YU.
Moska, P.
author_sort Nepop, R.K.
title Radiocarbon dating of organic-rich deposits: Difficulties of paleogeographical interpretations in highlands of Russian Altai
title_short Radiocarbon dating of organic-rich deposits: Difficulties of paleogeographical interpretations in highlands of Russian Altai
title_full Radiocarbon dating of organic-rich deposits: Difficulties of paleogeographical interpretations in highlands of Russian Altai
title_fullStr Radiocarbon dating of organic-rich deposits: Difficulties of paleogeographical interpretations in highlands of Russian Altai
title_full_unstemmed Radiocarbon dating of organic-rich deposits: Difficulties of paleogeographical interpretations in highlands of Russian Altai
title_sort radiocarbon dating of organic-rich deposits: difficulties of paleogeographical interpretations in highlands of russian altai
publisher Walter de Gruyter GmbH
publishDate 2020
url http://dx.doi.org/10.2478/geochr-2020-0018
https://content.sciendo.com/view/journals/geochr/47/1/article-p138.xml
https://www.sciendo.com/pdf/10.2478/geochr-2020-0018
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permafrost
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permafrost
op_source Geochronometria
volume 47, issue 1, page 138-153
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