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  1. 紀要論文
  2. 琉球大学理学部紀要
  3. 60号
  1. 部局別インデックス
  2. 理学部

Geology and Petrology of the Nishi and Fudenzaki Formations of the Aguni Group, Aguni Island, the Central Ryukyu Arc : Petrogenetic Relationship between the Andesites and Dacites

http://hdl.handle.net/20.500.12000/5436
http://hdl.handle.net/20.500.12000/5436
6a155b4a-2cd5-43b3-84b2-ab4cfa3c89be
名前 / ファイル ライセンス アクション
No60p27.pdf No60p27.pdf
Item type デフォルトアイテムタイプ(フル)(1)
公開日 2008-03-28
タイトル
タイトル Geology and Petrology of the Nishi and Fudenzaki Formations of the Aguni Group, Aguni Island, the Central Ryukyu Arc : Petrogenetic Relationship between the Andesites and Dacites
言語 en
作成者 Shinjo, Ryuichi

× Shinjo, Ryuichi

en Shinjo, Ryuichi

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Usami, Ken

× Usami, Ken

en Usami, Ken

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Kato, Yuzo

× Kato, Yuzo

en Kato, Yuzo

Search repository
新城, 竜一

× 新城, 竜一

ja 新城, 竜一

Search repository
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
内容記述
内容記述タイプ Other
内容記述 The late Miocene volcanic rocks of the Aguni Group range from basalt to rhyolite, and have a pronounced compositional gap between 57 and 69 wt.% SiO_2. Sr isotopic ratios for a dacite lava from the Nishi Formation (0.70463) and a gabbroic fragment from the Fudenzaki Formation (0.70455) are similar to those of the basalt-andesite suite (0.70452-0.70466). Both major- and trace-element variations from andesite to dacite are explainable in terms of fractional crystallization involving removal of the observed phenocryst phases in the evolved volcanic rocks. The Rare Earth Elements (REE) patterns of gabbroic fragments appear to coincide with the pattern of cumulate expected from fractional crystallization. A shallow composition-temperature slope of cotectic involving amphibole-bearing gabbroic assemblages is responsible for the development of bimodality between the andesites and dacites.
内容記述
内容記述タイプ Other
内容記述 紀要論文
出版者
言語 ja
出版者 琉球大学理学部
言語
言語 eng
資源タイプ
資源タイプ departmental bulletin paper
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
識別子
識別子 http://hdl.handle.net/20.500.12000/5436
識別子タイプ HDL
収録物識別子
収録物識別子タイプ ISSN
収録物識別子 0286-9640
収録物識別子
収録物識別子タイプ NCID
収録物識別子 AN00250774
収録物名
言語 ja
収録物名 琉球大学理学部紀要
収録物名
言語 en
収録物名 Bulletin of the College of Science. University of the Ryukyus
書誌情報
号 60, p. 27-50, 発行日 1995-09
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