| |  Online-Ressource |
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| Verfasst von: | Zech, Michael [VerfasserIn]  |
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| | Kreutzer, Sebastian [VerfasserIn] |
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| | Zech, Roland [VerfasserIn] |
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| | Goslar, Tomasz [VerfasserIn] |
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| | Meszner, Sascha [VerfasserIn] |
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| | McIntyre, Cameron [VerfasserIn] |
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| | Häggi, Christoph [VerfasserIn] |
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| | Eglinton, Timothy Ian [VerfasserIn] |
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| | Faust, Dominik [VerfasserIn] |
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| | Fuchs, Markus [VerfasserIn] |
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| Titel: | Comparative 14C and OSL dating of loess-paleosol sequences to evaluate post-depositional contamination of n-alkane biomarkers |
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| Verf.angabe: | Michael Zech, Sebastian Kreutzer, Roland Zech, Tomasz Goslar, Sascha Meszner, Cameron McIntyre, Christoph Häggi, Timothy Eglinton, Dominik Faust, Markus Fuchs |
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| E-Jahr: | 2017 |
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| Jahr: | 06 February 2017 |
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| Umfang: | 10 S. |
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| Fussnoten: | Im Titel ist 14 hochgestellt ; Gesehen am 26.03.2025 |
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| Titel Quelle: | Enthalten in: Quaternary research |
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| Ort Quelle: | Cambridge : Cambridge University Press, 1970 |
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| Jahr Quelle: | 2017 |
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| Band/Heft Quelle: | 87(2017), 1, Seite 180-189 |
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| ISSN Quelle: | 1096-0287 |
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| Abstract: | There is an ongoing controversial discussion as to whether n-alkane lipid biomarkers—and organic matter of loess in general—reflect a synsedimentary paleoenvironmental/climate signal or whether they are significantly affected by postdepositional “contamination,” for example related to root and rhizomicrobial activity. In order to address this issue at our study site (the Middle to Late Weichselian loess-paleosol sequence Gleina in Saxony, Germany), we determined and compared radiocarbon ages of bulk n-alkanes and sedimentation ages, as assessed by optically stimulated luminescence (OSL) dating. The bulk n-alkanes of the four dated samples yielded calibrated 14C ages ranging from 24.1 to 49.7 cal ka BP (95.4% probability ranges). While the three uppermost n-alkane samples are well within the range or even slightly older than the OSL-inferred sedimentation ages, the lowermost n-alkane sample is slightly younger than the OSL ages. There is hence little or no evidence at our study site for n-alkanes in loess-paleosol sequences being significantly “contaminated” by deep subsoil rooting or microbial processes. We propose a 14C isotope mass balance calculation for estimating such contaminations quantitatively. Radiocarbon dating of bulk n-alkanes might have great potential for Quaternary research, and we encourage further comparative 14C and OSL studies. |
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| DOI: | doi:10.1017/qua.2016.7 |
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| URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
Volltext: https://doi.org/10.1017/qua.2016.7 |
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| | Volltext: https://www.cambridge.org/core/journals/quaternary-research/article/comparative-14c-and-osl-dating-of-loesspaleosol-sequ ... |
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| | DOI: https://doi.org/10.1017/qua.2016.7 |
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| Datenträger: | Online-Ressource |
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| Sprache: | eng |
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| Sach-SW: | Lipid biomarkers |
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| | Loess |
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| | Luminescence dating |
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| | n-Alkanes |
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| | Radiocarbon dating |
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| | Rhizomicrobial |
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| | Roots |
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| | Soil organic matter |
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| | Subsoil |
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| K10plus-PPN: | 192059809X |
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| Verknüpfungen: | → Zeitschrift |
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Comparative 14C and OSL dating of loess-paleosol sequences to evaluate post-depositional contamination of n-alkane biomarkers / Zech, Michael [VerfasserIn]; 06 February 2017 (Online-Ressource)
