Surface water freshening and high-latitude river discharge in the Eocene North Sea.

Journal article


Publication Details

Author(s): Zacke A, Voigt S, Joachimski M, Gale AS, Ward DJ, Tuetken T
Journal: Journal of the Geological Society
Publisher: Geological Society
Publication year: 2009
Volume: 166
Pages range: 969-980
ISSN: 0016-7649


Abstract


A shark-tooth apatite δ18O record of the early Palaeogene North Sea reflects changes in regional hydrography by showing variable temperatures and salinities. A 2-4 Ma period in the early Eocene was particularly influenced by substantial surface-water freshening, indicated by a 3-4‰ reduction of δ18O values. The magnitude of the δ18O decrease indicates a depletion in 18O of surface waters by 2-3‰ relative to Eocene mean ocean water. This value is lower than that of coeval lakes reconstructed from freshwater gastropod δ18O values from the Paris Basin, suggesting that large rivers with high-latitude catchment areas drained into the North Sea. The period of surface-water freshening began close to the Palaeocene - Eocene thermal maximum, when relative sea-level fall, tectonic uplift and basaltic volcanism caused a temporary isolation of the North Sea. North Atlantic and North Sea surface waters became reconnected during a series of early Eocene transgressions. © 2009 Geological Society of London.



FAU Authors / FAU Editors

Joachimski, Michael Prof. Dr.
Lehrstuhl für Geologie (Exogene Dynamik)


External institutions
German University of Technology in Oman (GUtech) / الجامعة الألمانية للتكنولوجيا في عمان
Leibniz-Institut für Meereswissenschaften (Geomar-IfM)
Rheinische Friedrich-Wilhelms-Universität Bonn
University of Portsmouth


How to cite

APA:
Zacke, A., Voigt, S., Joachimski, M., Gale, A.S., Ward, D.J., & Tuetken, T. (2009). Surface water freshening and high-latitude river discharge in the Eocene North Sea. Journal of the Geological Society, 166, 969-980. https://dx.doi.org/10.1144/0016-76492008-068

MLA:
Zacke, Anne, et al. "Surface water freshening and high-latitude river discharge in the Eocene North Sea." Journal of the Geological Society 166 (2009): 969-980.

BibTeX: 

Last updated on 2018-07-08 at 03:09