Complex mantle flow around heterogeneous subducting oceanic plates

Fabio Antonio Capitanio, Manuele Faccenda

    Research output: Contribution to journalArticleResearchpeer-review

    21 Citations (Scopus)

    Abstract

    The foundering of oceanic lithospheres controls the circulation patterns of the mantle around subducting slabs. Here, we investigate the sensitivity of the mantle flow to slab buoyancy variations along convergent margins using three-dimensional numerical models of subduction in a viscous mantle. The models illustrate that in a buoyancy-driven system varying subduction velocity arising from negative buoyancy variations effectively drives pressure gradients and confers a general flow component sub-parallel to the margin s strike, allowing for material transport over large distances around the slabs. The along-slab velocity component introduces widespread horizontal simple shear in the mantle flow which is maximized beneath the slab between similar to 100 and similar to 350 km. Mantle flow complexities develop rapidly, although not instantaneously, upon subduction of heterogeneous plates.
    Original languageEnglish
    Pages (from-to)29 - 37
    Number of pages9
    JournalEarth and Planetary Science Letters
    Volume353
    DOIs
    Publication statusPublished - 2012

    Cite this

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    title = "Complex mantle flow around heterogeneous subducting oceanic plates",
    abstract = "The foundering of oceanic lithospheres controls the circulation patterns of the mantle around subducting slabs. Here, we investigate the sensitivity of the mantle flow to slab buoyancy variations along convergent margins using three-dimensional numerical models of subduction in a viscous mantle. The models illustrate that in a buoyancy-driven system varying subduction velocity arising from negative buoyancy variations effectively drives pressure gradients and confers a general flow component sub-parallel to the margin s strike, allowing for material transport over large distances around the slabs. The along-slab velocity component introduces widespread horizontal simple shear in the mantle flow which is maximized beneath the slab between similar to 100 and similar to 350 km. Mantle flow complexities develop rapidly, although not instantaneously, upon subduction of heterogeneous plates.",
    author = "Capitanio, {Fabio Antonio} and Manuele Faccenda",
    year = "2012",
    doi = "10.1016/j.epsl.2012.07.042",
    language = "English",
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    Complex mantle flow around heterogeneous subducting oceanic plates. / Capitanio, Fabio Antonio; Faccenda, Manuele.

    In: Earth and Planetary Science Letters, Vol. 353, 2012, p. 29 - 37.

    Research output: Contribution to journalArticleResearchpeer-review

    TY - JOUR

    T1 - Complex mantle flow around heterogeneous subducting oceanic plates

    AU - Capitanio, Fabio Antonio

    AU - Faccenda, Manuele

    PY - 2012

    Y1 - 2012

    N2 - The foundering of oceanic lithospheres controls the circulation patterns of the mantle around subducting slabs. Here, we investigate the sensitivity of the mantle flow to slab buoyancy variations along convergent margins using three-dimensional numerical models of subduction in a viscous mantle. The models illustrate that in a buoyancy-driven system varying subduction velocity arising from negative buoyancy variations effectively drives pressure gradients and confers a general flow component sub-parallel to the margin s strike, allowing for material transport over large distances around the slabs. The along-slab velocity component introduces widespread horizontal simple shear in the mantle flow which is maximized beneath the slab between similar to 100 and similar to 350 km. Mantle flow complexities develop rapidly, although not instantaneously, upon subduction of heterogeneous plates.

    AB - The foundering of oceanic lithospheres controls the circulation patterns of the mantle around subducting slabs. Here, we investigate the sensitivity of the mantle flow to slab buoyancy variations along convergent margins using three-dimensional numerical models of subduction in a viscous mantle. The models illustrate that in a buoyancy-driven system varying subduction velocity arising from negative buoyancy variations effectively drives pressure gradients and confers a general flow component sub-parallel to the margin s strike, allowing for material transport over large distances around the slabs. The along-slab velocity component introduces widespread horizontal simple shear in the mantle flow which is maximized beneath the slab between similar to 100 and similar to 350 km. Mantle flow complexities develop rapidly, although not instantaneously, upon subduction of heterogeneous plates.

    U2 - 10.1016/j.epsl.2012.07.042

    DO - 10.1016/j.epsl.2012.07.042

    M3 - Article

    VL - 353

    SP - 29

    EP - 37

    JO - Earth and Planetary Science Letters

    JF - Earth and Planetary Science Letters

    SN - 0012-821X

    ER -