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火山体崩壊に起因する火山災害軽減のためのパイロット研究 : 木片の14C年代測定と火山岩塊のSr同位体比からみた前橋泥流の時空分布
https://doi.org/10.18999/nagubc.2.35
https://doi.org/10.18999/nagubc.2.3539769f09-12a7-497e-a5ca-dd13891c7f4a
名前 / ファイル | ライセンス | アクション |
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035-039_2017.pdf (1.6 MB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2018-08-20 | |||||
タイトル | ||||||
タイトル | 火山体崩壊に起因する火山災害軽減のためのパイロット研究 : 木片の14C年代測定と火山岩塊のSr同位体比からみた前橋泥流の時空分布 | |||||
言語 | ja | |||||
その他のタイトル | ||||||
その他のタイトル | A pilot study for the mitigation of volcanic hazard caused by collapse of volcano : Maebashi mudflow deposit in time and space estimated from 14C ages of wood blocks and Sr isotope ratios of volcanic blocks | |||||
言語 | en | |||||
著者 |
佐藤, 興平
× 佐藤, 興平× 南, 雅代× 中村, 俊夫× 武者, 巌× 柴田, 賢× Sato, Kohei× MIinami, Masayo× Nakamura, Toshio× Musha, Iwao× Shibata, Ken |
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アクセス権 | ||||||
アクセス権 | open access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Maebashi mudflow deposit | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 14C age | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 87Sr/86Sr ratio | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Asama volcano | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Paleolithic age | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 前橋泥流 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 14C 年代 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 87Sr/86Sr 比 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 浅間火山 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 旧石器時代 | |||||
抄録 | ||||||
内容記述 | Age of the Maebashi mudflow deposit, currently estimated to be 24,000 BP, was re-evaluated by AMS-14C dating of a wood specimen from an outcrop on the Tone River bank. The specimen yielded 22,570±60 BP (±1σ). The calibrated age was 27,180−26,589 cal BP (±2σ) and 3000 years older than the previous estimate. Origin and distribution of the Maebashi mudflow deposit were identified by 87Sr/86Sr ratios of volcanic blocks within the mudflow deposits, in comparison with 87Sr/86Sr data for surrounding volcanoes. The mudflow was generated by the collapse of Asama volcano, flowed down along the Agatsuma and Tone rivers, and deposited in the wide area around Maebashi and Takasaki. Distribution of the Stone Age remains appears to reflect the extent of the Maebashi mudflow deposit. | |||||
言語 | en | |||||
内容記述タイプ | Abstract | |||||
抄録 | ||||||
内容記述 | 約2.4万年前とされてきた前橋泥流につき,利根川河岸の露頭から採取した木片のAMS-14C年代を高精度で測定し,22,570±60BP(±1σ)を得た.暦年較正した年代は27,180−26,589calBP(±2σ)となり,従来の推定より3000年ほど古いとの結論が得られた.また,泥流に含まれる安山岩質火山岩塊の87Sr/86Sr比を測定して,泥流の起源と広がりを検討した.その結果,前橋−高崎地域の平坦部のほぼ全域に浅間山起源の泥流が広がっており,その分布と泥流が流下した旧石器時代の遺跡の分布とが相関している可能性があるとの見通しが得られた. | |||||
言語 | ja | |||||
内容記述タイプ | Abstract | |||||
出版者 | ||||||
言語 | ja | |||||
出版者 | 名古屋大学宇宙地球環境研究所 | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | departmental bulletin paper | |||||
出版タイプ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
ID登録 | ||||||
ID登録 | 10.18999/nagubc.2.35 | |||||
ID登録タイプ | JaLC | |||||
書誌情報 |
ja : 名古屋大学年代測定研究 巻 2, p. 35-39, 発行日 2018-03-31 |
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著者版フラグ | ||||||
値 | publisher |