Ce isotope ratios of N-type MORB

Akio Makishima, Akimasa Masuda

    Research output: Contribution to journalArticlepeer-review

    28 Citations (Scopus)

    Abstract

    Isotope ratios of Ce, Nd and Sr, and light rare-earth elements (La, Ce, Nd and Sm) concentrations were measured for sixteen N-type MORB samples from DSDP Sites 420, 421, 429, 597B and 597C (East Pacific Rise), 504B (Costa Rica Rift), and 395, 519A, 522B, 562 and 564 (Mid Atlantic Ridge). All the samples were confirmed as N-type MORB based on Nd and Sr isotope ratios, and LREE patterns. The Ce isotope ratios ranged from 0.0225616 (ε{lunate}Ce = - 1.6) to 0.0225633 (ε{lunate}Ce = - 1.0). Averages of ε{lunate}Ce and ε{lunate}Nd of N-type MORB were - 1.4 and 9.5, respectively. The average of ε{lunate}Ce is quite different from previous estimates. We propose that ε{lunate}Ce = - 1.4 should be used as the typical MORB Ce isotope ratio in future studies.

    Original languageEnglish
    Pages (from-to)1-8
    Number of pages8
    JournalChemical Geology
    Volume118
    Issue number1-4
    DOIs
    Publication statusPublished - Dec 5 1994

    ASJC Scopus subject areas

    • Geology
    • Geochemistry and Petrology

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