MANTLE HOTSPOTS, PLUMES AND REGIONAL TECTONICS AS CAUSES OF INTRAPLATE MAGMATISM

Chris Hawkesworth, K GALLAGHER

    Research output: Contribution to journalArticlepeer-review

    64 Citations (Scopus)

    Abstract

    In continental areas it is often difficult to determine the cause of intraplate magmatism. Large volumes of magma, high eruption rates, and the presence of a hotspot trace on the adjacent ocean floor, are all evidence for the presence of an anomalously hot mantle. However, in many continental magmas there are chemical variations with time which are inferred to reflect changes from asthenospheric to predominantly lithospheric source regions, or vice versa. It is argued that these chemical characteristics constrain whether magmatism was triggered by the emplacement of a mantle plume, or by lithospheric extension.

    Original languageEnglish
    Pages (from-to)552-559
    Number of pages8
    JournalTerra Nova
    Volume5
    Issue number6
    Publication statusPublished - 1993

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