Full text

Turn on search term navigation

Copyright Copernicus GmbH 2014

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 ([per thousand]) lower than δ18Odiatom with a calculated mean offset of 3.9[per thousand] ± 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.

Details

Title
Pliocene diatom and sponge spicule oxygen isotope ratios from the Bering Sea: isotopic offsets and future directions
Author
Snelling, A M; Swann, G E A; Pike, J; Leng, M J
First page
1837
Publication year
2014
Publication date
2014
Publisher
Copernicus GmbH
ISSN
18149324
e-ISSN
18149332
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
1624974939
Copyright
Copyright Copernicus GmbH 2014