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The δ<sup>13</sup>C, δ<sup>18</sup>O and Δ 47 records in biogenic, pedogenic and geogenic carbonate types from paleosol-loess sequence and their paleoenvironmental meaning

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dc.contributor.author Zamanian K.
dc.contributor.author Lechler A.R.
dc.contributor.author Schauer A.J.
dc.contributor.author Kuzyakov Y.
dc.contributor.author Huntington K.W.
dc.date.accessioned 2022-02-09T20:31:51Z
dc.date.available 2022-02-09T20:31:51Z
dc.date.issued 2021
dc.identifier.issn 0033-5894
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/168790
dc.description.abstract Paleoenvironmental reconstructions are commonly based on isotopic signatures of a variety of carbonate types, including rhizoliths and land-snail shells, present in paleosol-loess sequences. However, various carbonate types are formed through distinct biotic and abiotic processes over various periods, and therefore may record diverging environmental information in the same sedimentological layer. Here, we investigate the effects of carbonate type on δ13C, δ18O, and clumped isotope-derived paleotemperature [T(Δ47)] from the Quaternary Nussloch paleosol-loess sequence (Rhine Valley, SW Germany). δ13C, δ18O, and T(Δ47) values of co-occurring rhizoliths (-8.2‰ to-5.8‰,-6.1‰ to-5.9‰, 12-32°C, respectively), loess dolls (-7.0‰,-5.6‰, 23°C), land-snail shells (-8.1‰ to-3.2‰,-4.0‰ to-2.2‰, 12-38°C), earthworm biospheroliths (-11‰,-4.7‰, 8°C), and bulk carbonates (-1.9‰ to-0.5‰,-5.6‰ to-5.3‰, 78-120°C) from three sediment layers depend systematically on the carbonate type, admixture from geogenic carbonate, and the duration of formation periods. Based on these findings, we provide a comprehensive summary for the application of the three isotopic proxies of δ13C, δ18O, and Δ47 in biogenic and pedogenic carbonates present in the same sediment layer to reconstruct paleoenvironments (e.g., local vegetation, evaporative conditions, and temperature). We conclude that bulk carbonates in Nussloch loess should be excluded from paleoenvironmental reconstructions. Instead, pedogenic and biogenic carbonates should be used to provide context for interpreting the isotopic signature for detailed site- A nd time-specific paleoenvironmental information.
dc.relation.ispartofseries Quaternary Research (United States)
dc.subject CaCO 3 formation
dc.subject Clumped isotopes
dc.subject Key words Rhizoliths
dc.subject Land-snail shells
dc.subject Loess
dc.subject Paleoenvironment reconstruction
dc.subject Paleosol
dc.subject Paleosol-loess sequence
dc.subject Pedogenic carbonates
dc.title The δ<sup>13</sup>C, δ<sup>18</sup>O and Δ 47 records in biogenic, pedogenic and geogenic carbonate types from paleosol-loess sequence and their paleoenvironmental meaning
dc.type Article
dc.relation.ispartofseries-volume 101
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 256
dc.source.id SCOPUS00335894-2021-101-SID85113259120


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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