First identification of cryptotephra from the Kamchatka Peninsula in a Greenland ice core: Implications of a widespread marker deposit that links Greenland to the Pacific northwest.

Cook, Eliza, Portnyagin, Maxim , Ponomareva, Vera, Bazanova, Lilia, Svensson, Anders and Garbe-Schönberg, Dieter (2018) First identification of cryptotephra from the Kamchatka Peninsula in a Greenland ice core: Implications of a widespread marker deposit that links Greenland to the Pacific northwest. Quaternary Science Reviews, 181 . pp. 200-206. DOI 10.1016/j.quascirev.2017.11.036.

[img] Text
Cook_mmc1.docx - Supplemental Material
Restricted to Registered users only

Download (25Kb) | Contact
[img] Other (Excel File)
Cook_mmc2.xlsx - Supplemental Material
Restricted to Registered users only

Download (127Kb) | Contact
[img] Text
Cook.pdf - Published Version
Restricted to Registered users only

Download (1392Kb) | Contact

Supplementary data:

Abstract

Highlights

• Widespread Holocene tephra KHG, from Kamchatka, is found as a cryptotephra in the NGRIP ice-core.
• This is the first identification of tephra from the Kamchatka Peninsula in Greenland ice.
• NGRIP KHG has an age of 7872 ± 50 a BP and improves age models for Kamchatka.
• Existing 14C age estimates for the KHG eruption are too young.

Abstract

Contiguous sampling of Holocene ice from the NGRIP core, Greenland, has revealed a new rhyolitic cryptotephra that is geochemically identical to the KHG tephra, a widespread marker deposit originating from the Khangar volcano, Kamchatka. This is the first identification of tephra from the Kamchatka Peninsula in Greenland ice and the first finding of the KHG tephra outside Kamchatka. The NGRIP KHG has an age of 7872 ± 50 a BP 1950, and this date will help improve age models for Kamchatka, where existing age estimates of KHG are too young, thus highlighting the importance of locating long-range, low-concentration cryptotephra deposits in well-dated ice cores. In Greenland KHG is located close to the termination of the 8.2 ka BP cooling event that is also a climate feature in palaeo-records of Kamchatka. This tie-point therefore provides a unique opportunity to synchronise records of environmental change in distal locations.

Document Type: Article
Funder compliance: info:eu-repo/grantAgreement/EC/FP7/610055
Keywords: Cryptotephra; Khangar; Kamchatka; Isochron; Greenland ice core; NGRIP
Research affiliation: OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-MUHS
Kiel University
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1016/j.quascirev.2017.11.036
ISSN: 0277-3791
Projects: ice2ice
Date Deposited: 03 Jan 2018 14:48
Last Modified: 06 Feb 2020 09:08
URI: http://oceanrep.geomar.de/id/eprint/41179

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...