Инд. авторы:	Nepop R.K., Agatova A.R., Ovchinnikov I.Y, Bronnikova M.A., Zazovskaya E.P., Moska P.
Заглавие:	Radiocarbon dating of organic-rich deposits: difficulties of paleogeographical interpretations in highlands of russian altai
Библ. ссылка:	Nepop R.K., Agatova A.R., Ovchinnikov I.Y, Bronnikova M.A., Zazovskaya E.P., Moska P. Radiocarbon dating of organic-rich deposits: difficulties of paleogeographical interpretations in highlands of russian altai // Geochronometria: Journal on methods and applications of absolute chronology. - 2020. - Vol.47. - Iss. 1. - P.138-153. - ISSN 1733-8387. - EISSN 1897-1695.
Внешние системы:	DOI: 10.2478/geochr-2020-0018; РИНЦ: 45006861; WoS: 000612297300001;
Реферат:	eng: 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 14C 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.
Ключевые слова:	radiocarbon dating; pedogenesis; paleogeographical reconstructions; outburst floods; Ice-dammed lakes; Russian Altai;
Издано:	2020
Физ. характеристика:	с.138-153
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