書誌事項
- タイトル別名
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- Late-Pleistocene Tephrostratigraphy of Aso Volcano, Southwestern Japan, after Deposition of AT Ash
- アソカザン ニ オケル コウシン セイ マッキ AT カザンバイ イコウ ノ テフラソウ ジョ
- 公開日
- 2004
- 資源種別
- journal article
- DOI
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- 10.18940/kazan.49.2_51
- 公開者
- 特定非営利活動法人 日本火山学会
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説明
The stratigraphy and chronology of late-Pleistocene (after deposition of AT ash) tephra layers erupted from post-caldera central cones of Aso Volcano, SW Japan, are evaluated through study of the thick tephra sequence preserved mainly atop the pyroclastic-flow plateau east of the caldera. Twenty andesite to basaltic-andesite scoria-fall deposits (YmS20-YmS1 in ascending order) and two pumice-fall deposits (NbP2 and NbP1) were identified as maker beds for the interval ca. 29-13ka (calibrated 14C age). The tephra layers were produced mostly by scoria and ash eruptions of Nakadake, the only active post-caldera central cone, and their bulk volumes calculated from isopach maps range from 0.01 to 0.9km3. The radiocarbon ages of buried soils just below individual tephra layers reveal that YmS20 to YmS15 were erupted at ca. 22-21 ka and YmS20 to Ym-S1 at ca. 18-16ka. Total tephra volume during 29-13ka is estimated at about 1.3km3 (DRE). Production of tephra was mainly concentrated in two periods : 22-21 ka (0.8km3) and 18-16ka (0.5km3).
収録刊行物
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- 火山
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火山 49 (2), 51-64, 2004
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
- 1390282679280813312
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- NII論文ID
- 110003041414
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- NII書誌ID
- AN10512786
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- ISSN
- 21897182
- 04534360
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- HANDLE
- 2298/36982
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- NDL書誌ID
- 6961260
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- 本文言語コード
- ja
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- 資料種別
- journal article
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- データソース種別
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- JaLC
- IRDB
- NDLサーチ
- CiNii Articles
- Crossref
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- 抄録ライセンスフラグ
- 使用不可
