Lanthanide tetrad effect observed in leucogranites from China

Akimasa Masuda, Tasuku Akagi

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Abstract

Some leucogranites from China have been found to display the tetrad effect (Masuda et. al., 1987). Abundances of all rare earth elements (REE) in leucogranites from Hunan Province, China, were studied for the first time by inductively coupled plasma mass spectrometry (ICP-MS) in order to investigate the shape of the tetrad effect. The chondrite normalized REE pattern consisting of all members except Eu revealed a clear M-type tetrad effect, according to the classification by Masuda et. al. (1987). Eu shows a strong negative anomaly. These features may reflect a long history of contact with water. Mathematical analyses of the REE patterns suggest also an octad effect behind the patterns and symmetry between the first (La-Ce-Pr-Nd) and fourth tetrads (Er-Tm-Yb-Lu).

Original languageEnglish
Pages (from-to)245-253
Number of pages9
JournalGEOCHEMICAL JOURNAL
Volume23
Issue number5
DOIs
Publication statusPublished - Jan 1 1989
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology

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