Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

The Distal and Local Volcanic Ash in the Late Pleistocene Sediments of the Termination I Interval at the Reykjanes Ridge, North Atlantic, Based on Study of the Core AMK-340

Alexander Matul
* ORCID logo ,
Irina F. Gablina
,
Tatyana A. Khusid
,
Natalya V. Libina
,
Antonina I. Mikhailova
Version 1 : Received: 18 June 2019 / Approved: 19 June 2019 / Online: 19 June 2019 (15:38:40 CEST)

A peer-reviewed article of this Preprint also exists.

Matul, A.; Gablina, I.F.; Khusid, T.A.; Libina, N.V.; Mikhailova, A.I. The Distal and Local Volcanic Ash in the Late Pleistocene Sediments of the Termination I Interval at the Reykjanes Ridge, North Atlantic, Based on the Study of the Core AMK-340. Geosciences 2019, 9, 379. Matul, A.; Gablina, I.F.; Khusid, T.A.; Libina, N.V.; Mikhailova, A.I. The Distal and Local Volcanic Ash in the Late Pleistocene Sediments of the Termination I Interval at the Reykjanes Ridge, North Atlantic, Based on the Study of the Core AMK-340. Geosciences 2019, 9, 379.

Abstract

Based on the geochemical analysis of the volcanic material from the sediment core AMK-340, central zone of the Reykjanes Ridge, we could detect two ash-bearing sediment units accumulated during the Termination I. They correlate to the Ash Zone I in the North Atlantic Late Quaternary sediments having an age of 12170-12840, within the Younger Dryas cold chronozone, and 13600-14540 years, within and Bølling-Allerød warm chronozone. The ash of the Younger Dryas unit is presented mostly by the mafic and persilicic material originated from the Icelandic volcanoes; Vedde Ash is presented in one sediment sample from this unit. The ash of the Bølling-Allerød unit is presented mostly by the mafic shards which are related to the basalts of the rift zone on the Reykjanes Ridge, having presumably the local origin. A detection of Vedde Ash helped to specify the timing of the previously reconstructed paleoceanographic changes for the Termination I in the point of study: a significant warming in the area could occur as early as 300 years prior to the end of the conventional Younger Dryas cold chronozone.

Keywords

tephra in marine sediments; Ash Zone I in North Atlantic; tephrochronology of Termination I

Subject

Environmental and Earth Sciences, Geophysics and Geology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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