DOI: 10.1016/j.quascirev.2018.03.023
Scopus记录号: 2-s2.0-85046472690
论文题名: Tracing marine cryptotephras in the North Atlantic during the last glacial period: Improving the North Atlantic marine tephrostratigraphic framework
作者: Abbott P.M. ; Griggs A.J. ; Bourne A.J. ; Chapman M.R. ; Davies S.M.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 189 起始页码: 169
结束页码: 186
语种: 英语
英文关键词: Marine cores
; North Atlantic
; Palaeoceanography
; Quaternary
; Tephra framework
; Tephrochronology
Scopus关键词: Climate change
; Climate models
; Deposits
; Geochemistry
; Glacial geology
; Salinity measurement
; Stratigraphy
; Volcanoes
; Marine cores
; North Atlantic
; Palaeoceanography
; Quaternary
; Tephra framework
; Tephrochronology
; Oceanography
英文摘要: Tephrochronology is increasingly being recognised as a key tool for the correlation of disparate palaeoclimatic archives, underpinning chronological models and facilitating climatically independent comparisons of climate proxies. Tephra frameworks integrating both distal and proximal tephra occurrences are essential to these investigations providing key details on their spatial distributions, geochemical signatures, eruptive sources as well as any available chronological and/or stratigraphic information. Frameworks also help to avoid mis-correlation of horizons and provide important information on volcanic history. Here we present a comprehensive chronostratigraphic framework of 14 tephra horizons from North Atlantic marine sequences spanning 60-25 cal ka BP. Horizons previously discovered as visible or coarse-grained deposits have been combined with 11 newly recognised volcanic deposits, identified through the application of cryptotephra identification and characterisation methods to a wide network of marine sequences. Their isochronous integrity has been assessed using their physical characteristics. All horizons originated from Iceland with the vast majority having a basaltic composition sourced from the Grímsvötn, Kverkfjöll, Hekla/Vatnafjöll and Katla volcanic systems. New occurrences, improved stratigraphic placements and a refinement of the geochemical signature of the NAAZ II are reported and the range of the FMAZ IV has been extended. In addition, several significant geochemical populations that further investigations could show to be isochronous are reported. This tephra framework provides the foundation for the correlation and synchronisation of these marine records to the Greenland ice-cores and European terrestrial records to investigate the phasing, rate, timing and mechanisms controlling rapid climate changes that characterised the last glacial period. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112195
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Department of Geography, College of Science, Swansea University, Singleton Park, Swansea, SA2 8PP, United Kingdom; School of Earth and Ocean Sciences, Cardiff University, Park Place, Cardiff, CF10 3AT, United Kingdom; Institute of Geological Sciences and Oeschger Center for Climate Change Research, University of Bern, Baltzerstrasse 1+3, Bern, 3012, Switzerland; Geography and Environment, University of Southampton, University Road, Southampton, SO17 1BJ, United Kingdom; School of Environmental Sciences, University of East Anglia, Norwich Research ParkNR4 7TJ, United Kingdom
Recommended Citation:
Abbott P.M.,Griggs A.J.,Bourne A.J.,et al. Tracing marine cryptotephras in the North Atlantic during the last glacial period: Improving the North Atlantic marine tephrostratigraphic framework[J]. Quaternary Science Reviews,2018-01-01,189