Details
| Original language | English |
|---|---|
| Pages (from-to) | 256-272 |
| Number of pages | 17 |
| Journal | Quaternary Research (United States) |
| Volume | 101 |
| Publication status | Published - May 2021 |
| Externally published | Yes |
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.
Keywords
- CaCO 3 formation, Clumped isotopes, Key words Rhizoliths, Land-snail shells, Loess, Paleoenvironment reconstruction, Paleosol, Paleosol-loess sequence, Pedogenic carbonates
ASJC Scopus subject areas
- Arts and Humanities(all)
- Arts and Humanities (miscellaneous)
- Earth and Planetary Sciences(all)
- Earth-Surface Processes
- Earth and Planetary Sciences(all)
- General Earth and Planetary Sciences
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In: Quaternary Research (United States), Vol. 101, 05.2021, p. 256-272.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - The δ13C, δ18O and Δ 47 records in biogenic, pedogenic and geogenic carbonate types from paleosol-loess sequence and their paleoenvironmental meaning
AU - Zamanian, Kazem
AU - Lechler, Alex R.
AU - Schauer, Andrew J.
AU - Kuzyakov, Yakov
AU - Huntington, Katharine W.
N1 - Publisher Copyright: Copyright © University of Washington. Published by Cambridge University Press, 2021.
PY - 2021/5
Y1 - 2021/5
N2 - 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.
AB - 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.
KW - CaCO 3 formation
KW - Clumped isotopes
KW - Key words Rhizoliths
KW - Land-snail shells
KW - Loess
KW - Paleoenvironment reconstruction
KW - Paleosol
KW - Paleosol-loess sequence
KW - Pedogenic carbonates
UR - http://www.scopus.com/inward/record.url?scp=85113259120&partnerID=8YFLogxK
U2 - 10.1017/qua.2020.109
DO - 10.1017/qua.2020.109
M3 - Article
AN - SCOPUS:85113259120
VL - 101
SP - 256
EP - 272
JO - Quaternary Research (United States)
JF - Quaternary Research (United States)
SN - 0033-5894
ER -