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AMS Radiocarbon dating of holocene tephra layers on ulleung Island, South Korea

Title
AMS Radiocarbon dating of holocene tephra layers on ulleung Island, South Korea
Authors
Okuno M.Shiihara M.Torii M.Nakamura T.Kim K.-H.Domitsu H.Moriwaki H.Oda M.
Ewha Authors
김규한
SCOPUS Author ID
김규한scopusscopus
Issue Date
2010
Journal Title
Radiocarbon
ISSN
0033-8222JCR Link
Citation
vol. 52, no. 3, pp. 1465 - 1470
Indexed
SCI; SCIE; SCOPUS scopus
Abstract
Ulleung Island, a large stratovolcano, is located in the western part of the Japan Sea (East Sea), 130 km off the eastern coast of the Korean Peninsula. The Ulleung-Oki (U-Oki) is a widely distributed tephra in and around the Japan Sea, and has an age of 10.7 cal ka BP obtained from the Lake Suigetsu data set (central Japan). Of the 7 tephra layers (U-7 to -1) on the island, the pumiceous U-4, U-3, and U-2 tephra layers are petrochemically and petrographically similar to the U-Oki tephra. To determine the eruption ages of 3 tephra layers on Ulleung Island, we conducted radiocarbon dating for 5 soil and 2 charcoal samples. Although the soil samples have the C/N ratios from 5 to 10, the obtained 14C dates are still consistent with the tephra stratigraphy of the island. The calibrated 14C dates for the U-4, U-3, and U-2 tephras are 11 cal ka BP, 8.3 or 9 cal ka BP, and 5.6 cal ka BP, respectively, indicating that the explosive eruptions occurred in the island with a time interval of 2000 to 3000 yr during the period of the early to middle Holocene. Based on our chronology, the U-4 tephra is most likely correlated with the U-Oki tephra. © 2010 by the Arizona Board of Regents on behalf of the University of Arizona.
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사범대학 > 과학교육과 > Journal papers
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