Rb-Sr age of the dunite channel in the Horoman peridotite complex

DOI

Bibliographic Information

Other Title
  • 幌満かんらん岩体ダナイトチャネルのRb-Sr年代

Abstract

The Horoman peridotite complex of Japan is one of the freshest orogenic peridotite complexes in the world. Dunite channels occur both as large scale (several 10 meters width) concordant layers and as small scale (< several meters width) discordant layers. The small scale dunite channels incorporate two-pyroxenes + spinel segregations. We present the Rb-Sr isotopic compositions of olivine, orthopyroxene and clinopyroxene both from a dunite dyke swarm (Sample Nos. SPR4 and 6) and from a wall harzburgite (Sample Nos. SPR14). Obtained data and previous reported data indicate that melt through the dunite channel was derived from source of their wall harzburgite metasomatized by melt and fluid derived from slab. This event could occur around 50 Ma, coevaled with peak metamorphism of surrounding Hidaka metamorphic rock.

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Details 詳細情報について

  • CRID
    1390282680522428672
  • NII Article ID
    130005008290
  • DOI
    10.14824/jakoka.2008.0.48.0
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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