期刊
QUATERNARY SCIENCE REVIEWS
卷 164, 期 -, 页码 230-235出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.quascirev.2017.04.007
关键词
Holocene; Cryptotephra; Arctic; Pacific; Svalbard
资金
- Norwegian Research Council through the project Shifting Climate States of the Polar Regions [210004]
- INTIMATE COST action [ES0907]
- University of Bergen
Rapidly deposited and geochemically distinct volcanic ash (tephra) markers represent a powerful chronological tool that enables precise dating and correlation of geological archives. Recent analytical advances now allow fingerprinting of non-visible ash (cryptotephra) over thousands of kilometers. This has opened up tantalizing possibilities for the intercontinental synchronization of records. We present geochemical evidence to demonstrate that ash from a Svalbard lake sediment core correlates to the Kamchatkan KS2 eruption. By expanding the known dispersal range of cryptotephra by thousands of kilometers and linking the Pacific and Atlantic Arctic, this study raises cryptotephra analysis to a new level. Also, the presented findings mark a step towards a hemispheric tephrochronological framework. Finally, this study highlights the importance of looking beyond proximal volcanic sources to find a correlation. (C) 2017 Elsevier Ltd. All rights reserved.
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