Development of mantle seismic anisotropy during subduction-induced 3-D flow

Manuele Faccenda, Fabio Antonio Capitanio

    Research output: Contribution to journalArticleResearchpeer-review

    56 Citations (Scopus)

    Abstract

    The dynamics of subduction can be indirectly constrained by studying the induced mantle flow. However, inferring the circulation of the mantle around subducting plates from the interpretation of shear wave splitting patterns remains elusive. We calculated the strain-induced lattice preferred orientation (LPO) developed in 3-D models of subduction where retreat motions are maximized and found that in the mantle layer entrained with the downgoing slab the seismic anisotropy is trench-perpendicular, and becomes trench-parallel deeper, where the toroidal flow accommodates slab retreat. Synthetic SKS splitting shows that in the fore-arc slab rollback favors trench-parallel polarization of the fast shear wave component, while plate advance enhances trench-perpendicular seismic anisotropy.
    Original languageEnglish
    Pages (from-to)1 - 5
    Number of pages5
    JournalGeophysical Research Letters
    Volume39
    DOIs
    Publication statusPublished - 2012

    Cite this

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    title = "Development of mantle seismic anisotropy during subduction-induced 3-D flow",
    abstract = "The dynamics of subduction can be indirectly constrained by studying the induced mantle flow. However, inferring the circulation of the mantle around subducting plates from the interpretation of shear wave splitting patterns remains elusive. We calculated the strain-induced lattice preferred orientation (LPO) developed in 3-D models of subduction where retreat motions are maximized and found that in the mantle layer entrained with the downgoing slab the seismic anisotropy is trench-perpendicular, and becomes trench-parallel deeper, where the toroidal flow accommodates slab retreat. Synthetic SKS splitting shows that in the fore-arc slab rollback favors trench-parallel polarization of the fast shear wave component, while plate advance enhances trench-perpendicular seismic anisotropy.",
    author = "Manuele Faccenda and Capitanio, {Fabio Antonio}",
    year = "2012",
    doi = "10.1029/2012GL051988",
    language = "English",
    volume = "39",
    pages = "1 -- 5",
    journal = "Geophysical Research Letters",
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    publisher = "Wiley-Blackwell",

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    Development of mantle seismic anisotropy during subduction-induced 3-D flow. / Faccenda, Manuele; Capitanio, Fabio Antonio.

    In: Geophysical Research Letters, Vol. 39, 2012, p. 1 - 5.

    Research output: Contribution to journalArticleResearchpeer-review

    TY - JOUR

    T1 - Development of mantle seismic anisotropy during subduction-induced 3-D flow

    AU - Faccenda, Manuele

    AU - Capitanio, Fabio Antonio

    PY - 2012

    Y1 - 2012

    N2 - The dynamics of subduction can be indirectly constrained by studying the induced mantle flow. However, inferring the circulation of the mantle around subducting plates from the interpretation of shear wave splitting patterns remains elusive. We calculated the strain-induced lattice preferred orientation (LPO) developed in 3-D models of subduction where retreat motions are maximized and found that in the mantle layer entrained with the downgoing slab the seismic anisotropy is trench-perpendicular, and becomes trench-parallel deeper, where the toroidal flow accommodates slab retreat. Synthetic SKS splitting shows that in the fore-arc slab rollback favors trench-parallel polarization of the fast shear wave component, while plate advance enhances trench-perpendicular seismic anisotropy.

    AB - The dynamics of subduction can be indirectly constrained by studying the induced mantle flow. However, inferring the circulation of the mantle around subducting plates from the interpretation of shear wave splitting patterns remains elusive. We calculated the strain-induced lattice preferred orientation (LPO) developed in 3-D models of subduction where retreat motions are maximized and found that in the mantle layer entrained with the downgoing slab the seismic anisotropy is trench-perpendicular, and becomes trench-parallel deeper, where the toroidal flow accommodates slab retreat. Synthetic SKS splitting shows that in the fore-arc slab rollback favors trench-parallel polarization of the fast shear wave component, while plate advance enhances trench-perpendicular seismic anisotropy.

    U2 - 10.1029/2012GL051988

    DO - 10.1029/2012GL051988

    M3 - Article

    VL - 39

    SP - 1

    EP - 5

    JO - Geophysical Research Letters

    JF - Geophysical Research Letters

    SN - 0094-8276

    ER -