DOI: 10.5194/cp-10-1837-2014
Scopus记录号: 2-s2.0-84908025462
论文题名: Pliocene diatom and sponge spicule oxygen isotope ratios from the Bering Sea: Isotopic offsets and future directions
作者: Snelling A.M. ; Swann G.E.A. ; Pike J. ; Leng M.J.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2014
卷: 10, 期: 5 起始页码: 1837
结束页码: 1842
语种: 英语
Scopus关键词: concentration (composition)
; dating method
; diatom
; oxygen isotope
; Pliocene
; species diversity
; sponge
; water column
; Bering Sea
; Pacific Ocean
; Bacillariophyta
英文摘要: Oxygen isotope analyses of different size fractions of Pliocene diatoms (Î18Odiatom) 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. © 2014 Author(s). 资助项目: NERC, Natural Environment Research Council
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49216
Appears in Collections: 气候变化与战略
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Recommended Citation:
Snelling A.M.,Swann G.E.A.,Pike J.,et al. Pliocene diatom and sponge spicule oxygen isotope ratios from the Bering Sea: Isotopic offsets and future directions[J]. Climate of the Past,2014-01-01,10(5)