AMS Radiocarbon Dating of Holocene Tephra Layers on Ulleung Island, South Korea
| Autor: | Hanako Domitsu, Kyu Han Kim, Miki Shiihara, Hiroshi Moriwaki, Masayuki Torii, Mitsuru Okuno, Toshio Nakamura, Motoyoshi Oda |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
010506 paleontology
Archeology geography geography.geographical_feature_category Explosive eruption 060102 archaeology Geochemistry 06 humanities and the arts 01 natural sciences law.invention Oceanography Volcano law Period (geology) General Earth and Planetary Sciences Stratovolcano 0601 history and archaeology Radiocarbon dating Tephra Geology Holocene 0105 earth and related environmental sciences Chronology |
| Zdroj: | ResearcherID |
| ISSN: | 1945-5755 0033-8222 |
| DOI: | 10.1017/s0033822200046555 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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