Trace-element of Tuoyun clinopyroxene

Implication for the deep processes of lithospheric mantle beneath the southwest Tianshan, West China

J. Zheng, F. Lu, S. Y. O'Reilly, Z. Luo

    Research output: Contribution to journalArticle

    14 Citations (Scopus)

    Abstract

    Based on the LAM-ICPMS analytic results on the trace elements of clinopyroxenes in peridotitic xenoliths occurring in early-Cretaceous basalts from western Xinjiang, the properties and the deep processes, including partial melting and mantle metasomatism, of the subcontinental lithospheric mantle beneath the Tuoyun Basin are analyzed. In the northern edge of the Tarim Basin “southwest Tianshan”, the Mesozoic subcontinental lithosphere which has experienced the effect of partial melting “<10%” and intricate mantle metasomatism is characterized by Phanerozoic 'ocean-type' mantle. The superposed influence of SiO2-unsaturated silicate melt and carbonate melt probably results in the metasomatic medium which resembles the hydrous silicated carbonate melt in some aspects. By comparing Tuoyun mantle with Cenozoic main mantle beneath eastern China, the properties are similar, while the former shows finer grain and higher diopside content of the peridotites and more conspicuous modal metasomatism.

    Original languageEnglish
    Pages (from-to)1206-1211
    Number of pages6
    JournalChinese Science Bulletin
    Volume46
    Issue number14
    DOIs
    Publication statusPublished - 2001

    Keywords

    • Deep process
    • LAM-ICPMS
    • Mantle clinopyroxene
    • Mantle heterogeneity
    • West China

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