Skip to main content

Research Repository

Advanced Search

Pliocene diatom and sponge spicule oxygen isotope ratios from the Bering Sea: isotopic offsets and future directions

Snelling, Andrea M.; Swann, G.E.A.; Pike, Jennifer; Leng, Melanie J.

Pliocene diatom and sponge spicule oxygen isotope ratios from the Bering Sea: isotopic offsets and future directions Thumbnail


Authors

Andrea M. Snelling

Jennifer Pike

Melanie J. Leng



Abstract

Oxygen isotope analyses of different size fractions of Pliocene diatoms (δ18Odiatom) from the Bering Sea show no evidence of an isotope offset and support the use of bulk diatom species samples for palaeoceanographic reconstructions. Additional samples containing concentrations of sponge spicules produce δ18O values several per mille (‰) lower than δ18Odiatom with a calculated mean offset of 3.9‰ ± 1.5. This difference is significantly greater than modern-day variations in water δ18O through the regional water column. Despite the potential for oxygen isotope disequilibrium within δ18Osponge, there appears to be some similarity between δ18Osponge and a global stacked benthic δ18Oforam record. This highlights the potential for δ18Osponge in palaeoenvironmental research at sites where carbonates are not readily preserved.

Journal Article Type Article
Publication Date Jan 1, 2014
Deposit Date Jun 19, 2015
Publicly Available Date Jun 19, 2015
Journal Climate of the Past
Print ISSN 1814-9324
Electronic ISSN 1814-9324
Publisher European Geosciences Union
Peer Reviewed Peer Reviewed
Volume 10
DOI https://doi.org/10.5194/cp-10-1837-2014
Public URL https://nottingham-repository.worktribe.com/output/999810
Publisher URL http://www.clim-past.net/10/1837/2014/cp-10-1837-2014.html

Files





You might also like



Downloadable Citations