气候变化领域集成服务门户(CCPortal): Ocean-rafted pumice constrains postglacial relative sea-level and supports Holocene ice cap survival

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DOI	10.1016/j.quascirev.2020.106654
	Ocean-rafted pumice constrains postglacial relative sea-level and supports Holocene ice cap survival
	Farnsworth W.R.; Blake W.; Jr.; Guðmundsdóttir E.R.; Ingólfsson Ó.; Kalliokoski M.H.; Larsen G.; Newton A.J.; Óladóttir B.A.; Schomacker A.
发表日期	2020
ISSN	0277-3791
卷号	250
英文摘要	Distally deposited tephra from explosive volcanic eruptions can be a powerful tool for precise dating and correlation of sedimentary archives and landforms. However, the morphostratigraphic and chronological potential of ocean-rafted pumice has been under-utilized considering its long observational history and widespread distribution on modern and palaeo-shorelines around the world. Here we analyze the geochemical composition and elevation data of 60 samples of ocean-rafted pumice collected since 1958 from raised beaches on Svalbard. Comparison of pumice data with postglacial relative sea-level history suggests eight distinct pumice rafting events throughout the North Atlantic during the Middle and Late Holocene. Analyzed ocean-rafted pumice exhibit consistent silicic composition characteristic of deposits from Iceland's volcanic system, Katla. Eruption-triggered jökulhlaups are key drivers of the transport of pumice from the Katla caldera to beyond the coast of Iceland and into the surface currents of the North Atlantic Ocean. Thus, the correlation of distinct, high-concentration pumice horizons from Katla deposited along raised Middle Holocene beach ridges in Svalbard further advocates for the persistence of the Mýrdalsjökull ice cap through the Holocene thermal maximum. © 2020 The Author(s)
英文关键词	Holocene thermal maximum; Iceland; Katla; Svalbard; Tephrochronology
语种	英语
scopus关键词	Beaches; Sea level; Snow; Volcanoes; Composition characteristics; Geochemical composition; Holocene thermal maximums; North Atlantic Ocean; Relative sea level; Surface current; Volcanic eruptions; Volcanic systems; Ocean currents; beach; Holocene; Hypsithermal; ice cap; Pleistocene-Holocene boundary; Postglacial; pumice; sea level change; tephra; volcanic eruption; Arctic; Atlantic Ocean; Atlantic Ocean (North); Iceland; Katla; Svalbard; Svalbard and Jan Mayen
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151234
作者单位	Nordic Volcanological Center, University of Iceland, Sturlugata 7, Reykjavík, IS-101, Iceland; Arctic Geology Department, University Centre in Svalbard (UNIS), Longyearbyen, N-9171, Norway; Department of Geosciences, UiT The Arctic University of Norway, P.O. Box 6050, Langnes, N-9037, Norway; Formerly with the Geological Survey of Canada, 601 Booth St., Ottawa, Canada; Institute of Earth Sciences, University of Iceland, Sturlugata 7, Reykjavík, IS-101, Iceland; School of GeoSciences, University of Edinburgh, Drummond St., Edinburgh, Scotland EH8 9XP, United Kingdom; IMO Icelandic Meteorological Office, Bústaðavegur 7-9, Reykjavík, IS-105, Iceland
推荐引用方式 GB/T 7714	Farnsworth W.R.,Blake W.,Jr.,et al. Ocean-rafted pumice constrains postglacial relative sea-level and supports Holocene ice cap survival[J],2020,250.
APA	Farnsworth W.R..,Blake W..,Jr..,Guðmundsdóttir E.R..,Ingólfsson Ó..,...&Schomacker A..(2020).Ocean-rafted pumice constrains postglacial relative sea-level and supports Holocene ice cap survival.Quaternary Science Reviews,250.
MLA	Farnsworth W.R.,et al."Ocean-rafted pumice constrains postglacial relative sea-level and supports Holocene ice cap survival".Quaternary Science Reviews 250(2020).