| |  Online-Ressource |
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| Verfasst von: | Weißbach, Therese [VerfasserIn]  |
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| | Kluge, Tobias [VerfasserIn] |
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| | Affolter, Stéphane [VerfasserIn] |
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| | Leuenberger, Markus C. [VerfasserIn] |
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| | Vonhof, Hubert [VerfasserIn] |
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| | Riechelmann, Dana [VerfasserIn] |
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| | Fohlmeister, Jens [VerfasserIn] |
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| | Juhl, Marie-Christin [VerfasserIn] |
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| | Löw, Benedikt [VerfasserIn] |
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| | Wu, Yao [VerfasserIn] |
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| | Warken, Sophie F. [VerfasserIn] |
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| | Schmidt, Martina [VerfasserIn] |
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| | Frank, Norbert [VerfasserIn] |
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| | Aeschbach, Werner [VerfasserIn] |
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| Titel: | Constraints for precise and accurate fluid inclusion stable isotope analysis using water-vapour saturated CRDS techniques |
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| Verf.angabe: | Therese Weissbach, Tobias Kluge, Stéphane Affolter, Markus C. Leuenberger, Hubert Vonhof, Dana F.C. Riechelmann, Jens Fohlmeister, Marie-Christin Juhl, Benedikt Hemmer, Yao Wu, Sophie F. Warken, Martina Schmidt, Norbert Frank, Werner Aeschbach |
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| E-Jahr: | 2023 |
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| Jahr: | February 2023 |
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| Umfang: | 15 S. |
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| Fussnoten: | Published: 12 December 2022 ; Gesehen am 20.06.2023 |
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| Titel Quelle: | Enthalten in: Chemical geology |
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| Ort Quelle: | New York, NY [u.a.] : Elsevier, 1966 |
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| Jahr Quelle: | 2023 |
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| Band/Heft Quelle: | 617(2023), Artikel-ID 121268, Seite 1-15 |
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| ISSN Quelle: | 1872-6836 |
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| Abstract: | Hydrogen (δ2H) and oxygen (δ18O) isotopes of water extracted from speleothem fluid inclusions are important proxies used for paleoclimate reconstruction. In our study we use a cavity ring-down laser spectroscopy system for analysis and modified the approach of Affolter et al. (2014) for sample extraction. The method is based on crushing of small sub-gram speleothem samples in a heated and continuously water-vapour purged extraction line. The following points were identified: Injection of reference water shows a precision (1σ) of 0.4-0.5 ‰ for δ18O values and 1.1-1.9 ‰ for δ2H values for water amounts of 0.1-0.5 μl, which improves with increasing water amount to 0.1-0.3 ‰ and 0.2-0.7 ‰, respectively, above 1 μl. The accuracy of measurements of water injections and water-filled glass capillaries crushed in the system is better than 0.08 ‰ for δ18O and 0.3 ‰ for δ2H values. The reproducibility (1σ) based on replicate analysis of speleothem fluid inclusion samples with water amounts >0.2 μl is 0.5 ‰ for δ18O and 1.2 ‰ for δ2H values, respectively. Isotopic differences between the water vapour background of the extraction system and the fluid inclusions have no significant impact on the measured fluid inclusion isotope values if they are within 10 ‰ for δ18O and 50 ‰ for δ2H values of the background. Tests of potential adsorption effects with inclusion free spar calcite confirm that the isotope values are unaffected by adsorption for water contents of about 1 μl (fluid inclusion) water per g of carbonate or above. Fluid inclusion analysis on three different modern to late Holocene speleothems from caves in northwest Germany resulted in δ18O and δ2H values that follow the relationship as defined by the meteoric water line and that correspond to the local drip water. Yet, due to potential isotope exchange reactions for oxygen atoms, hydrogen isotope measurements are preferentially to be used for temperature reconstructions. We demonstrate this in a case study with a Romanian stalagmite, for which we reconstruct the 20th century warming with an amplitude of approximately 1 °C, with a precision for each data point of better than ±0.5 °C. |
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| DOI: | doi:10.1016/j.chemgeo.2022.121268 |
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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/10.1016/j.chemgeo.2022.121268 |
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| | Volltext: https://www.sciencedirect.com/science/article/pii/S0009254122005629 |
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| | DOI: https://doi.org/10.1016/j.chemgeo.2022.121268 |
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| Datenträger: | Online-Ressource |
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| Sprache: | eng |
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| Sach-SW: | Cavity-ring-down measurement |
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| | Laser spectroscopy |
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| | Paleoclimate |
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| | Small samples |
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| | Speleothems |
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| | Water isotopes |
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| K10plus-PPN: | 185066336X |
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| Verknüpfungen: | → Zeitschrift |
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Constraints for precise and accurate fluid inclusion stable isotope analysis using water-vapour saturated CRDS techniques / Weißbach, Therese [VerfasserIn]; February 2023 (Online-Ressource)
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