DOI: 10.1016/j.quascirev.2016.08.011
Scopus记录号: 2-s2.0-84985018857
论文题名: A new high-resolution Holocene tephra stratigraphy in eastern Iceland: Improving the Icelandic and North Atlantic tephrochronology
作者: Gudmundsdóttir E.R. ; Larsen G. ; Björck S. ; Ingólfsson Ó. ; Striberger J.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 150 起始页码: 234
结束页码: 249
语种: 英语
英文关键词: Holocene
; Iceland
; Lake Lögurinn
; Tephra markers
; Tephra stratigraphy
; Tephrochronology
Scopus关键词: Lakes
; Volcanoes
; Chemical compositions
; Explosive eruption
; High resolution
; Holocenes
; Icelands
; Tephra markers
; Tephrochronology
; Volcanic systems
; Stratigraphy
; basalt
; chemical composition
; explosive volcanism
; historical record
; Holocene
; marker bed
; resolution
; sequence stratigraphy
; stratotype
; tephra
; tephrochronology
; volcanic eruption
; Askja
; Atlantic Ocean
; Atlantic Ocean (North)
; Fosen
; Iceland
; Lake Logurinn
; Norway
英文摘要: A new and improved Holocene tephra stratigraphy and tephrochronological framework for eastern and northern Iceland is presented. Investigations of a sediment sequence from Lake Lögurinn have revealed a comprehensive tephra record spanning the last 10.200 years. A total of 157 tephra layers have been identified, whereof 149 tephra layers have been correlated to its source volcanic system using geochemistry, stratigraphy and age. Fifteen layers have chemical composition of two affinities that possibly represent two very closely spaced eruptions. Thus, these 157 tephra layers are believed to represent 172 explosive eruptions. Nineteen tephra marker layers have been identified in the Lake Lögurinn record (G1922, A1875, V1477, V1410, H1636, K1625, Ö1362, G1354, K1262, V874, Hrafnkatla, Sn-1, Grákolla, HY, H3, H4, HÖ, LL1755 and Reitsvík-8 tephra markers). New potential tephra markers are the silicic Askja L (∼9400 cal BP), the low titanium basalt layers, LL 1774 (∼10.150 cal BP) and LL 1755 (∼9990 cal BP), assigned to Veidivötn-Bárdarbunga and the tephra layers, LL 1527.8 (∼7850 cal BP), LL 911.2 (∼2370 cal BP), LL 908.4 (∼2350 cal BP), LL 781.9 (∼1930 cal BP), LL 644.4 (∼1480 cal BP), not yet correlated to a source volcanic system. A silicic tephra marker layer, Reitsvík 8, correlated to the Fosen tephra in Norway has been identified in Lake Lögurinn. The Lake Lögurinn tephra record has been connected and integrated with the Icelandic terrestrial tephrochronology and stratigraphy through 102 tephra layers, the marine tephra stratigraphy through 39 layers and overseas through 9 tephra layers. This record is the first high-resolution tephra stratigraphical and chronological framework for the Holocene in eastern Iceland as well as the most detailed and continuous record, and has considerable potential to serve as a key section or a stratotype for the Holocene in eastern Iceland and the North Atlantic. © 2016 Elsevier Ltd 资助项目: This work was supported by a post-doctoral grant from the Nordic Volcanological center (grant holder, E.R. Gudmundsdóttir), the Swedish Research Council (VR: 2005-4451, grant holder S. Björck) and the Icelandic Research council (Rannis: 60239021, grant holder Ó. Ingólfsson). We would like to thank the journal reviewers for their valuable comments and suggestions.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59449
Appears in Collections: 过去全球变化的重建
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作者单位: Nordic Volcanological Center, Institute of Earth Sciences, University of Iceland, Iceland; Institute of Earth Sciences, University of Iceland, Iceland; Department of Arctic Geology, The University Center in Svalbard, Svalbard and Jan Mayen; Department of Geology, Quaternary Sciences, Lund University, Sweden
Recommended Citation:
Gudmundsdóttir E.R.,Larsen G.,Björck S.,et al. A new high-resolution Holocene tephra stratigraphy in eastern Iceland: Improving the Icelandic and North Atlantic tephrochronology[J]. Quaternary Science Reviews,2016-01-01,150