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  1. 紀要論文
  2. 琉球大学理学部紀要
  3. 78号
  1. 部局別インデックス
  2. 理学部

Petrochemical evidence for diversity of magma compositions at the northwestern Ethiopian volcanic province

http://hdl.handle.net/20.500.12000/5381
http://hdl.handle.net/20.500.12000/5381
3208f4e0-acb9-49a9-8e5b-a1cf7dc74423
名前 / ファイル ライセンス アクション
No78p251.pdf No78p251.pdf
Item type デフォルトアイテムタイプ(フル)(1)
公開日 2008-03-27
タイトル
タイトル Petrochemical evidence for diversity of magma compositions at the northwestern Ethiopian volcanic province
言語 en
作成者 Meshesha, Agonafir Daniel

× Meshesha, Agonafir Daniel

en Meshesha, Agonafir Daniel

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Shinjo, Ryuichi

× Shinjo, Ryuichi

en Shinjo, Ryuichi

Search repository
新城, 竜一

× 新城, 竜一

ja 新城, 竜一

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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
内容記述
内容記述タイプ Other
内容記述 Petrographic characteristics and whole-rock major and trace element data are presented for the Bure volcanic rocks from the northwestern Ethiopian plateau of East Africa continental flood basalt province, to investigate the processes that involved in the genesis of the erupted magma and its source composition during plume-induced continental rifting. The Bure area is mainly composed of stratified basalts, recent basalts, scoria cones and trachyte plugs. The successions of the erupted basalts are from transitional tholeiites to alkaline basalts. The transitional tholeiites have higher Zr/Nb (8.88-21.86) and Rb/Nb (0.66-1.87) than those of the alkaline (Zr/Nb=2.19-6.21, Rb/Nb=0.26-0.74), indicating that they are originated from distinct magma sources. The compositional variation in the transitional tholeiites cannot be explainable in terms of fractional crystallization of common (or similar) primary magma; instead it reflects the involvement of various mantle and crustal components in their petrogenesis. By contrast, the variation in the alkali suite can be explained by dominant fractional crystallization process of OIB-like primary basalts that derived from the Afar mantle plume. The strong lithospheric signature observed in the transitional tholeiites suggests pronounce interaction between the Afar plume and the lithosphere at the initial stage of continental break-up.
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/20.500.12000/5381
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 78, p. 251-266, 発行日 2004-09
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