| Project/Area Number |
23501254
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Geography
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| Research Institution | Fukuoka University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
WADA Keiji 北海道教育大学, 教育学部, 教授 (50167748)
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| Co-Investigator(Renkei-kenkyūsha) |
NAKAMURA Toshio 名古屋大学, 年代測定総合研究センター, 教授 (10135387)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2011: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | テフラ / 放射性炭素年代 / アリュート遺跡 / 火山噴火史 / 完新世 / アダック島 / グレート・シットキン島 / 噴火史 / 炭素14年代測定 / 火山ガラス / 主成分化学組成 / テフラカタログ / 環境変化 / 海洋リザーバー効果 / 噴火災害 / アリューシャン列島 / アラスカ |
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| Research Abstract |
Adak Island, Aleutian Islands, Alaska is covered with Holocene sequences of soil-tephra complexes. Tephra layers are useful for establishing a chronographic framework on the island. Black (1976) described the three conspicuous tephra deposits (Main, Intermediate and Sandwich). This study conducted coring peat deposits near Haven Lake, in order to re-evaluate the chronological framework. This study obtained petrography and radiocarbon date using accelerator mass spectrometry (AMS). Eruptions of the Main, Intermediate, Sandwich, YBO and Forty Year tephra were dated to approximately 9.5, 7.2, 4.7, 3.6 and 0.4 cal kBP, respectively.
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