华北地台东部古生代与新生代岩石圈地幔特征及其演化

Translated title of the contribution: Comparison between Palaeozoic and Cenozoic Lithospheric Mantle in the Eastern Part of the North China Block - With a Discussion of Mantle Evolution

Jianping Zheng*, Fengxiang Lu, S. Y. O'Reilly, W. L. Griffin, Ming Zhang

*Corresponding author for this work

    Research output: Contribution to journalArticle

    17 Citations (Scopus)

    Abstract

    Palaeozoic diamond-and xenolith-bearing kimberlites and Cenozoic xeoolith-bearing basalts, erupted in the eastern part of the North China Block (NCB), provide excellent mantle probes for research on intraplate processes and the Phanerozoic evolution of the subcontinental lithospheric mantle (SCLM). In this study, the mineral inclusions in diamond and xenoliths from Mengyin (Shandong province) and Fuxian (Liaoning province) kimberlites were chosen for constraining the nature of Palaeozoic SCLM, while xenoliths from the Shanwang and Qixia basalts (in Shandong province) were chosen for constraining the natures of Cenozoic SCLM, Shanwang lies astride the Taneheng - Lujiang (Tanlu) fault zone, a major lithospheric fault in eastern China, and Qixia lies east, of the fault zone. Based on the research on the petrography of mantle xenoliths, petrochemistry, major and trace element geochemistry of mantle minerals, mantle heat state, combined with the modern geophysical data, it is concluded that the attenuation and replacement of the Palaeozoic SCLM by upwelling asthenospheric materials through thermal erosion and possibly delamination resulted in the formation of irregular-shaped hot bodies, mainly along weakness zones within the mantle. The Tanlu fault played an important role in the Cenozoic replacement of the pre-existing lithospheric mantle.

    Original languageChinese
    Pages (from-to)54-56
    Number of pages3
    JournalActa Geologica Sinica
    Volume73
    Issue number1
    Publication statusPublished - 1999

    Keywords

    • Asthenospheric material
    • Replacement and attenuation
    • Taneheng - Lujiang fault zone
    • Thermal erosion
    • Weakness zone in the mantle

    Fingerprint Dive into the research topics of 'Comparison between Palaeozoic and Cenozoic Lithospheric Mantle in the Eastern Part of the North China Block - With a Discussion of Mantle Evolution'. Together they form a unique fingerprint.

    Cite this