Trace element composition of Tertiary volcanic rocks of northeast Japan

Mitsuru Ebihara, Yuji Nakamura, Hiroshi Wakita, Hajime Kurasawa, Tadashi Konda

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Abstract

Abundances of trace elements including rare earth elements (REE) were determined by instrumental neutron activation analysis for twenty three Tertiary volcanic rocks of northeast Japan, Posh tive correlations were confirmed in the following couples of elements: HfLa, K-La, Th-La and Fe-Sc. Unlike Quaternary volcanic rocks, Tertiary volcanic rocks show no definite correlation between the inclination of REE patterns and the distance of sampling sites from the estimated volcanic front of the Tertiary, The presence of low alkali tholeiites with relatively flat REE patterns in the Japan Sea side suggests that Tertiary volcanism is qualitatively different from Quaternary one.

Original languageEnglish
Pages (from-to)287-295
Number of pages9
JournalGeochemical Journal
Volume18
Issue number6
DOIs
Publication statusPublished - 1984 Jan 1
Externally publishedYes

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ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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