石川県の中新統七曲層中に産する玄武岩の岩石学的特徴 -背弧側地域の低カリウム玄武岩- Petrological characteristics of basalts from the Miocene Nanamagari Formation in Ishikawa Prefecture -Low-K basalts from the back-arc side of central Japan-

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The Nanamagari Formation of the Miocene in the back-arc side of central Japan is composed mainly of silicic pyroclastic rocks associated with basaltic pyroclastic rocks and dikes. New and published K-Ar ages and biostratigraphic ages indicate that the basaltic volcanism occurred during 16-12 Ma. This volcanism may have associated with opening of the Japan Sea back-arc basin. By comparison with experimental data, we estimated that the possible primary magmas of these basalts were segregated from the upper mantle at about 1.4 GPa, 1330°C. The basaltic rocks show a trace element abundance pattern typical of island arc low-K basalts. The incompatible element ratios suggest that these basalts were derived from the mantle source similar to the magma source of basalts from the Quaternary volcanic front of northeast Japan.

収録刊行物

  • 岩鉱 : 岩石鉱物鉱床学会誌 : journal of mineralogy, petrology and economic geology  

    岩鉱 : 岩石鉱物鉱床学会誌 : journal of mineralogy, petrology and economic geology 92(10), 410-424, 1997-10-05 

    Japan Association of Mineralogical Sciences

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各種コード

  • NII論文ID(NAID)
    10002089398
  • NII書誌ID(NCID)
    AN10047992
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09149783
  • NDL 記事登録ID
    4378231
  • NDL 雑誌分類
    ZM46(科学技術--地球科学--岩石・鉱物・鉱床)
  • NDL 請求記号
    Z15-71
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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