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Petrologic Characteristics of Cenozoic Alkaline Basalts from the Azas Plateau, Northeast Tuva (Russia)
http://hdl.handle.net/10097/41074
http://hdl.handle.net/10097/41074d0eb9d1b-2c98-4563-8003-c9b39216e0e9
名前 / ファイル | ライセンス | アクション |
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KJ00004380596.pdf (1.9 MB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2010-02-05 | |||||
タイトル | ||||||
タイトル | Petrologic Characteristics of Cenozoic Alkaline Basalts from the Azas Plateau, Northeast Tuva (Russia) | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Alkaline basalt | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Cenozoic volcanism | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Plateau lava | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Baikal Rift | |||||
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 | departmental bulletin paper | |||||
著者 |
LITASOV, Yury
× LITASOV, Yury× HASENAKA, Toshiaki× LITASOV, Konstantin× YARMOLYUK, Vladimir× SUGORAKOVA, Amina× LEBEDEV, Vladimir× SASAKI, Minoru× TANIGUCHI, Hiromitsu |
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著者別名 | ||||||
姓名 | リタソフ, ユーリ | |||||
著者別名 | ||||||
姓名 | 長谷中, 利昭 | |||||
著者別名 | ||||||
姓名 | リタソフ, コンスタンチン | |||||
著者別名 | ||||||
姓名 | ヤルモリューク, ウラジミール | |||||
著者別名 | ||||||
姓名 | スゴラコバ, アミナ | |||||
著者別名 | ||||||
姓名 | レベデフ, ウラジミール | |||||
著者別名 | ||||||
姓名 | 佐々木, 実 | |||||
著者別名 | ||||||
姓名 | 谷口, 宏充 | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The Azas Plateau is a part of the East-Tuva Highland (West Sayan ridge, the south of Krasnoyarsk Region, Siberia). It is the westernmost lava field of the Baikal Rift System, covering about 2000km^2. A volume of volcanics is estimated as high as 600km^3. The volcanics are represented by massive lava flows and thick hyaloclastite units. Their composition corresponds to alkaline basalts and basanites. The most intensive volcanic activity started about 2 Ma from basaltic fissure eruptions producing voluminous lava flows. The second stage voluminous eruptions formed the upper lava unit on the surface of moderately eroded lower lava flows. During the next stages, the eruptions became centralized so that several volcanic centers were formed along certain lineaments marking deep-seated fissures. The peculiarity of the volcanic activity is that at least 7 volcanoes were formed during extensive glaciation covering the entire area of plateau. Moreover, the subglacial eruptions occurred about 0.7 and 0.1 Ma ago, whereas there was no sign of glaciation about 0.29 Ma ago, when Yurdawa shield volcano erupted. The subglacial eruptions formed table mountains (tuyas) with resembling structure of thick lower hyaloclastite units and armoring upper lava flows. The composition of lavas is rather uniform with slight variations in acidity and alkalinity of volcanics during eruptions. The most voluminous eruptions produced trachybasalts, smaller volcanoes are composed of tephrites/basanites. The basalts have typical for silica undersaturated rocks normalized REE patterns with regular enrichment in LREE and depletion in HREE. REE patterns, in accordance with eruption volumes, show lower degrees of partial melting for tephritic volcanoes (La/Yb=12-17) and higher degrees for trachybasalts (La/Yb=5-9). Correlation between La/Yb and Mg# indicates the formation of basalts by chemically identical source with one definite exception (Yurdawa volcano). The trace element compositions plotted on chondrite-normalized spidergram have OIB-like patterns. | |||||
内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 論文 | |||||
内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | Article | |||||
書誌情報 |
東北アジア研究 en : Northeast Asian studies 号 6, p. 201-226, 発行日 2002-03-31 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1343-9332 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA11158374 | |||||
フォーマット | ||||||
内容記述タイプ | Other | |||||
内容記述 | application/pdf | |||||
その他の言語のタイトル | ||||||
その他のタイトル | ロシア,トゥバ東北部,アザス台地の新生代アルカリ玄武岩の岩石学的特徴 | |||||
出版者 | ||||||
出版者 | 東北大学東北アジア研究センター | |||||
出版者 | ||||||
出版者 | publisher | |||||
資源タイプ | ||||||
内容記述タイプ | Other | |||||
内容記述 | 紀要類 | |||||
登録日 | ||||||
日付 | 2010-02-05 | |||||
日付タイプ | Created | |||||
公開日(投稿完了日) | ||||||
日付 | 2010-02-05 | |||||
日付タイプ | Created | |||||
発行日 | ||||||
日付 | 2002-03 | |||||
日付タイプ | Created | |||||
フォーマット | ||||||
内容記述タイプ | Other | |||||
内容記述 | 1898823 bytes | |||||
公開範囲 | ||||||
値 | 学外 | |||||
著者所属 | ||||||
ロシア科学アカデミー・シベリア支部・地質学地球物理学鉱物学合同研究所 地質学研究所,ノボシビルスク:秋田大学工学資源学部附属素材資源システム研究施設 / 秋田大学工学資源学部附属素材資源システム研究施設 / 東北大学東北アジア研究センター / ロシア科学アカデミー・鉱床学岩石学鉱物学地球化学研究所 / ロシア科学アカデミー・トゥバ天然資源開発研究所 / ロジア科学アカデミー・とヴバ天然資源開発研究所 / 弘前大学理工学部地球環境学科 / 東北大学東北アジア研究センター@@@Institute of Geology, United Institute of Geology, Geophysics and Mineralogy, Russian Academy of Sciences, Siberian Branch, Novosibirsk:Research Institute of Materials and Resources, Faculty of Engineering and Resource Science, Akita University@@@Research Institute of Materials and Resources, Faculty of Engineering and Resource Science, Akita University@@@Center for Northeast Asian Studies, Tohoku University@@@Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry, Russian Academy of Sciences@@@Tuvinian Institute for the Exploration of Natural Resources, Russian Academy of Sciences, Siberian Branch, Kyzyl@@@Tuvinian Institute for the Exploration of Natural Resources, Russian Academy of Sciences, Siberian Branch, Kyzyl@@@Department of Earth and Environmental Sciences, Faculty of Science and Technology, Hirosaki University@@@Center for Northeast Asian Studies, Tohoku University | ||||||
更新日 | ||||||
日付 | 2010-02-05 | |||||
日付タイプ | Created |