Late-Holocene ultra-distal cryptotephra discoveries in varved sediments of Lake Zabinskie, NE Poland

被引:7
|
作者
Kinder, Malgorzata [1 ]
Wulf, Sabine [2 ]
Appelt, Oona [3 ]
Hardiman, Mark [2 ]
Zarczynski, Maurycy [1 ]
Tylmann, Wojciech [1 ]
机构
[1] Univ Gdansk, Fac Oceanog & Geog, Bazynskiego 4, PL-80309 Gdansk, Poland
[2] Univ Portsmouth, Sch Environm Geog & Geosci, Buckingham Bldg,Lion Terrace, Portsmouth PO1 3HE, Hants, England
[3] Helmholtz Ctr Potsdam, GFZ German Res Ctr Geosci, Sect 3 6 Chem & Phys Earth Mat, D-14773 Potsdam, Germany
关键词
Cryptotephra; Askja; Mount Churchill; Azores; Varved sediments; Northeastern Poland; NORTH-EASTERN POLAND; ELECTRON-PROBE MICROANALYSIS; VOLCANIC ASH CLOUDS; LAACHER-SEE-TEPHRA; SAO-MIGUEL; FURNAS VOLCANO; CLIMATE-CHANGE; YOUNGER DRYAS; ICE-CORES; EUROPE;
D O I
10.1016/j.jvolgeores.2020.106988
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Varved (annually laminated) lake sediments provide valuable archives for ultra-distal tephra preservation and at the same time allow the precise dating of volcanic eruptive events. We used a high-precision varve chronology from Lake Zabinskie in NE Poland and EPMA glass chemical data to identify cryptotephra from three large-scale, late Holocene eruptions from European and Northern American volcanoes: the White River Ash eastern lobe (WRAe) eruption from Mount Churchill, Alaska (833-850 CE); a tentative finding of the Glen Garry eruption of the Askja volcano, Iceland (1966-2210 cal a BP); and an yet undefined eruption from Furnas volcano, Azores. The varve age of 863-903 CE of the Alaskan WRAe cryptotephra in Lake Zabinskie is slightly younger than the proximal radiocarbon date and the annual layer estimate of the distal AD860B correlative in the Greenland NGRIP ice core but is within C-14 dating uncertainties of distal tephra findings in the Irish peat record. The varve ages of the Glen Garry and Furnas tephras in Lake Zabinskie provide a minimum age at 1991 cal a BP (41 BCE). All three cryptotephra findings represent their easternmost occurrences from the volcanic source and hence considerably extend existing tephra dispersal maps. (C) 2020 Elsevier B.V. All rights reserved.
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页数:9
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