Genesis of basaltic plateau magmas in the Changbaishan area, northeast China

DOI

Bibliographic Information

Other Title
  • 中国北東部・白頭山地域の台地玄武岩マグマの成因

Abstract

The mechanisms of continental intraplate magmatism were investigated with respect to Cenozoic basaltic plateau lavas from the Changbaishan area, northeast China, using a comprehensive data set of major and trace elements, Sr, Nd, and Pb isotopic compositions, and K-Ar ages. The correlation between geochemical and geochronological data suggests that the magmas segregated at progressively greater depths with time, since at least 4.2 Ma. This feature cannot be explained in terms of temporal changes in the mantle potential temperature and/or bulk source composition. Instead, it appears likely that the rate of asthenosphere upwelling beneath the Changbaishan area decreased with time, whereby the melting depth gradually increased, resulting from a reduction in the heat flux from the upwelling mantle to the overlying lithosphere.

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Details 詳細情報について

  • CRID
    1390282680521321728
  • NII Article ID
    130004601477
  • DOI
    10.14824/jakoka.2009.0.86.0
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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