Be Isotope Studies on the Contribution of Subducted Oceanic Sediments to Arc Magma. The North-East Japan and Hokkaido Areas.

• SHIMAOKA Akiko

  Earthquake Research Institute, University of Tokyo

• KANEOKA Ichiro

  Faculty of Geo-Environmental Science, Rissho University

Bibliographic Information

Other Title

• Ｂｅ同位体比から見た島弧マグマヘの海洋性堆積物の寄与　　北海道・東北日本弧火山を例として
• Beドウイタイ ヒ カラ ミタ トウコ マグマ エ ノ カイヨウセイタイセキブツ ノ キヨ ホッカイドウトウホクニホンコ カザン オ レイ ト シテ
• The North-East Japan and Hokkaido Areas
• 北海道・東北日本弧火山を例として

Abstract

Cosmogenic ¹⁰Be (t_1/2=1.5×10⁶ years) has been revealed to be a quite useful tracer forsediment recycling at convergent margins. This study focuses on Be isotopic ratios of lavasfrom the North-East Japan including the Hokkaido area, which have been regarded as typicalsubducted areas. The results indicate the incorporation of oceanic sediments into the arcmagma. Regional Be isotopic variations in time and space have also been observed, suggestingthe possible occurrence of a more complicated process for Be isotopic ratios than previously considered.

Journal

• Journal of Geography (Chigaku Zasshi)

  Journal of Geography (Chigaku Zasshi) 109 (4), 627-635, 2000

  Tokyo Geographical Society

Keywords

• Be isotope
• North-East Japan arc
• volcanic rock
• subduction zone
• oceanic sediment

Details

• CRID: 1390282679206129792
• NII Article ID: 10004724556
• NII Book ID: AN00322536
• DOI: 10.5026/jgeography.109.4_627
• ISSN: 18840884
• ISSN: 0022135X
• NDL BIB ID: 5467537
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I5467537
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed