DOI: 10.1016/j.quascirev.2015.12.022
Scopus记录号: 2-s2.0-84956862040
论文题名: Postglacial environmental succession of Nettilling Lake (Baffin Island, Canadian Arctic) inferred from biogeochemical and microfossil proxies
作者: Narancic B. ; Pienitz R. ; Chapligin B. ; Meyer H. ; Francus P. ; Guilbault J.-P.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 147 起始页码: 391
结束页码: 405
语种: 英语
英文关键词: Arctic
; Diatoms
; Marine/lacustrine transition
; Multi-proxy study
; Oxygen isotope
; Postglacial reconstruction
; Sediment cores
; XRF
Scopus关键词: Isotopes
; Sediments
; Arctic
; Diatoms
; Marine/lacustrine transition
; Multi proxies
; Oxygen isotopes
; Sediment core
; Lakes
; Bacillariophyta
英文摘要: Nettilling Lake (Baffin Island, Nunavut) is currently the largest lake in the Canadian Arctic Archipelago. Despite its enormous size, this freshwater system remains little studied until the present-day. Existing records from southern Baffin Island indicate that in the early postglacial period, the region was submerged by the postglacial Tyrell Sea due to isostatic depression previously exerted by the Laurentide Ice Sheet. However, these records are temporally and spatially discontinuous, relying on qualitative extrapolation. This paper presents the first quantitative reconstruction of the postglacial environmental succession of the Nettilling Lake basin based on a 8300 yr-long high resolution sedimentary record. Our multi-proxy investigation of the glacio-isostatic uplift and subsequent changes in paleosalinity and sediment sources is based on analyses of sediment fabric, elemental geochemistry (μ-XRF), diatom assemblage composition, as well as on the first diatom-based oxygen isotope record from the eastern Canadian Arctic. Results indicate that the Nettilling Lake basin experienced a relatively rapid and uniform marine invasion in the early Holocene, followed by progressive freshening until about 6000 yr BP when limnological conditions similar to those of today were established. Our findings present evidence for deglacial processes in the Foxe Basin that were initiated at least 400yrs earlier than previously thought. © 2016 The Authors Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59502
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: Laboratoire de Paléoécologie Aquatique, Centre d'études nordiques & Département de géographie, Université LavalQC, Canada; Alfred Wegener Institute (AWI) Helmholtz Centre for Polar and Marine Research, Research Unit Potsdam, Telegrafenberg A43, Potsdam, Germany; Institut National de la Recherche Scientifique, Centre Eau-Terre-Environnement, Québec, QC, Canada; Musée de paléontologie et de l'évolution, Montréal, QC, Canada
Recommended Citation:
Narancic B.,Pienitz R.,Chapligin B.,et al. Postglacial environmental succession of Nettilling Lake (Baffin Island, Canadian Arctic) inferred from biogeochemical and microfossil proxies[J]. Quaternary Science Reviews,2016-01-01,147