書誌事項
- タイトル別名
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- Frequent and Intensive Eruptions in the 9th Century, Izu Islands, Japan : Revision of Volcano-Stratigraphy Based on Tephras and Historical Document
- 伊豆諸島における9世紀の活発な噴火活動について--テフラと歴史資料による層序の改訂
- イズ ショトウ ニ オケル 9セイキ ノ カッパツ ナ フンカ カツドウ ニ ツイテ テフラ ト レキシ シリョウ ニ ヨル ソウ ジョ ノ カイテイ
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Based on the study of tephra deposits and historical documents concerning with Izu islands, we reexamined the volcano-stratigraphy in and around Izu islands. We reconfirmed that Kozushima Tenjosan erupted in A.D.838 and Niijima Mukaiyama erupted in A.D.886. Eruptions from both volcanoes were big throughout their eruptive histories. Dispersed tephras from these eruptions covered most of the Izu islands, thus are good time-markers. Our results revealed that the several eruptive events occurred in between the A.D.838 and A.D.886 major volcanic episodes. In Izu-Oshima, the later stage of N3.0, N2.0 and N1.0 eruptions took place. In Niijima, a series of eruptions started with phreatomagmatic eruption of basaltic composition at Kudamaki and ended with the formation of Atchiyama rhyolite dome. In Miyakejima, lavas were effused from Oyama central vent which spilled over Hatchodaira caldera. A lateral fissure extended from the eastern flank to Miike and resulted in a phreatomagmatic eruption around A.D.850. We concluded that the volcanism during the middle of the 9th century in and around Izu islands was unusually high compared with the eruptions of both the preceding and the following periods.
収録刊行物
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- 火山
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火山 51 (5), 327-338, 2006
特定非営利活動法人 日本火山学会
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詳細情報 詳細情報について
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- CRID
- 1390282679281548928
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- NII論文ID
- 110004857943
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- NII書誌ID
- AN10512786
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- ISSN
- 21897182
- 04534360
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- NDL書誌ID
- 8560792
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- CiNii Articles
- KAKEN
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