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Permanent link (DOI): https://doi.org/10.7939/R3392N

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Stable isotopic fingerprint of resins and ambers: validation of a novel paleoclimatic indicator Open Access

Descriptions

Other title
Subject/Keyword
deuterium isotopic exchangeability of ambersdeuterium isotopic exchangeability of ambers
seasonal variability of modern conifer resins
amber
stable isotopic composition of ambers and resins
resin
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
González, Gabriela del Pilar
Supervisor and department
Muehlenbachs, Karlis (Earth and Atmospheric Sciences)
Examining committee member and department
Wolfe, Alexander (Earth and Atmospheric Sciences)
Erbilgin, Nadir (Renewable Resources Sciences)
Department
Department of Earth and Atmospheric Sciences
Specialization

Date accepted
2014-01-20T14:48:38Z
Graduation date
2014-06
Degree
Master of Science
Degree level
Master's
Abstract
Hydrous and anhydrous thermal maturation experiments were conducted to assess the extent to which diagenetic alteration overprints the primary stable δD and δ13C isotopic composition of resins. Modern resins recorded an average post-metabolic D exchange <1.9%, compared to only <0.5% for polymerized ambers, and no significant changes were observed in their δ13C. This study also evaluated the seasonal variability of modern resins, to better constrain the primary δD variability of resins. Accordingly, it was observed that in injury-induced resins, the seasonal δD variability could reach up to 80‰, recording short-term climate fluctuations (2–15 days). Moreover, the deuterium fractionation factor between resin and precipitation water (εresin-ppt) was found to be -228 ± 19‰. Overall, these results indicate that in resins, D isotopic exchange occurs prior to polymerization, thereby confirming that the stable isotopic composition of their fossilized counterparts constitute a potentially sensitive proxy for paleoenvironmental reconstructions.
Language
English
DOI
doi:10.7939/R3392N
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
Citation for previous publication
González, G., Wolfe, A. P., Muehlenbachs, K. (2013). “Environmental controls and seasonal variability on the δ2H composition of conifer resins”. CANQUA. Alberta, Canadá. González, G., Tappert, R., Wolfe, A. P., Muehlenbachs, K. (2012). “Is the deuterium isotope composition of amber a reliable inland paleoclimatic indicator?”. Mineralogical Magazine, 76, 1773. González, G., Tappert, R., Wolfe, A. P., Muehlenbachs, K. (2012). “Deuterium isotopic exchangeability of resin and amber at low thermal stress under hydrous conditions”. European Geophysical Union General Assembly, Vienna, Geophysical Research Abstracts 14: EGU2012-6836-2.

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