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北海道蝦夷層群における炭素同位体比曲線とイノセラムス生層序の対応関係
http://hdl.handle.net/2297/2535
http://hdl.handle.net/2297/25356ec05631-491f-4482-a274-ba81daae29b6
名前 / ファイル | ライセンス | アクション |
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AN00141768-HASEGAWA-109.pdf (1.2 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2017-10-03 | |||||
タイトル | ||||||
タイトル | 北海道蝦夷層群における炭素同位体比曲線とイノセラムス生層序の対応関係 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Stratigraphic relationship between diagnostic carbon isotope profiles and inoceramid biozones from the Yezo Group, Hokkaido, Japan | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
土屋, 健
× 土屋, 健× 長谷川, 卓× Pratt, Lisa M. |
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提供者所属 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 金沢大学大学院自然科学研究科 | |||||
書誌情報 |
地質学雑誌 巻 109, 号 1, p. 30-40, 発行日 2003-01-01 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0016-7630 | |||||
出版者 | ||||||
出版者 | 日本地質学会 | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | イノセラムス化石帯区分は上部白亜系の年代層序決定の手法として重要であるが,近年,本邦蝦夷層群において微化石との間に指標する年代区分に不一致が指摘されている.本論はイノセラムス化石帯に対応する炭素同位体比曲線を報告する.北海道大夕張・古丹別両地域のTuronian中部~Santonianの炭素同位体比曲線はInoceramus hobetsensis帯では負方向へのシフトを見せ,I. hobetsensis帯上部及びInoceramus teshioensis帯で特定傾向を示さず安定する.その上位のI. uwajimensis帯からInoceramus amakusensis帯に向かって次第に正方向にシフトする.この炭素同位体比曲線の経時変化パターンは,英国におけるTuronian中部からSantonian下部のものと類似する.それらに加え,I. hobetsensis帯に小規模なピークも見られ,これは国際対比の鍵になる可能性がある. Although inoceramid zones are important chronostratigraphic tools for the Japanese Upper Cretaceous, some recent studies suggested chronostratigraphic discrepancies between mega-and microfossil biochronologies from the Yezo Group in Hokkaido, Japan. Carbon isotope profiles from organic matters obtained in this study from three sections of Hokkaido resemble to isotope profiles from carbonate in England calibrated by biochronology with Tethyan index fossils. The carbon isotope profiles from the Kotanbetsu and Oyubari areas show negative shift segment through the Inoceramus hobetsensis Zone, stable value segment from the upper part of the Inoceramus hobetsensis Zone through the Inoceramus teshioensis Zone and gradual positive migration segment in the Inoceramus uwajimensis Zone and the Inoceramus amakusensis Zone in an acending order. This stratigraphic pattern of carbon isotope curve corresponds to the pattern characterizing the middle Turonian to lower Santonian for the England section. Short term positive excursions (as large as 0.5~1.0‰) superimposed on the long term fluctuation are observed in the Inoceramus hobetsensis Zone from the three sections. They may be potential stratigraphic markers correlative to the similar positive excursions observed in many European sections. | |||||
権利 | ||||||
権利情報 | 日本地質学会の許諾を得て登録 | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 |