Identification of a widespread Kamchatkan tephra: A middle Pleistocene tie-point between Arctic and Pacific paleoclimatic records.

Ponomareva, Vera, Portnyagin, Maxim, Derkachev, Alexander, Juschus, Olaf, Garbe-Schönberg, Dieter and Nürnberg, Dirk (2013) Identification of a widespread Kamchatkan tephra: A middle Pleistocene tie-point between Arctic and Pacific paleoclimatic records. Geophysical Research Letters, 40 . pp. 3538-3543. DOI 10.1002/grl.50645.

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Abstract

Very few age controls exist for Quaternary deposits over the vast territory of the East Russian Arctic, which hampers dating of major environmental changes in this area and prevents their correlation to climatic changes in the Arctic and Pacific marine domains. We report a newly identified ~177 ka old Rauchua tephra, which has been dispersed over an area of >1,500,000 km2 and directly links terrestrial paleoenvironmental archives from Arctic Siberia with marine cores in the northwest Pacific, thus permitting their synchronization and dating. The Rauchua tephra can help to identify deposits formed in terrestrial and marine environments during the oxygen isotope stage 6.5 warming event. Chemical composition of volcanic glass from the Rauchua tephra points to its island-arc origin, while its spatial distribution singles out the Kamchatka volcanic arc as a source. The Rauchua tephra represents a previously unknown, large (magnitude >6.5) explosive eruption from the Kamchatka volcanic arc.

Document Type: Article
Additional Information: WOS:000323392700010
Keywords: tephra; Arctic; Kamchatka; explosive eruption; Pacific
Research affiliation: Kiel University
OceanRep > The Future Ocean - Cluster of Excellence
OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-P-OZ Paleo-Oceanography
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-MUHS Magmatic and Hydrothermal Systems
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1002/grl.50645
ISSN: 0094-8276
Projects: KALMAR, Transdrift, Laptev Sea System, Otto Schmidt Laboratory, Future Ocean
Date Deposited: 03 Jul 2013 09:16
Last Modified: 24 May 2017 12:01
URI: http://oceanrep.geomar.de/id/eprint/21495

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