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Tag: Subduction flow

Subduction forces and flow pattern

Conceptual illustration for the basic forces and mantle flow pattern around subduction zones.

Conceptual illustration for the basic forces and mantle flow pattern around subduction zones. The forces indicated are: F_rp: Ridge push; F_sp: Slab pull; F_nb: Negative Buoyancy of the subducting lithosphere; F_ts: Trench suction. Resisting forces: R_d (c/o) mantle drag; R_s-c: Resistance at the subduction interface; R_b: Bending resistance; R_s: Mantle resistance on the slab; R_r: Mantle resistance on the ridge.

  • Creator: Ágnes Király
  • This version: 19.04.2023
  • License: Attribution-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
  • Specific citation: These graphics by Ágnes Király based on Forsyth and Uyeda (1975) are available via the open-access s-Ink.org repository.
  • Related reference: Forsyth, D., & Uyeda, S. (1975). On the relative importance of the driving forces of plate motion. Geophysical Journal International, 43(1), 163-200.
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Subduction seismic anisotropy

Illustration of constraints on subduction zone seismic anisotropy from a global compilation of shear-wave splitting measurements.

Illustration of constraints on subduction zone seismic anisotropy from shear-wave splitting measurements from the compilation presented in Long (2013). The subduction trenches compiled by Bird (2003) are shown in black. The anisotropic signals of the wedge (orange) and back-slab regions (blue) are shown separately. Blue arrows indicate average fast directions for the back-slab splitting signal from SKS (seismic waves traveling through the Outer Core), local S, and source-side tele-seismic S-splitting measurements (Long and Silver, 2009; Paczkowski, 2012). Orange arrows indicate average fast directions for wedge anisotropy from local S splitting (Long and Wirth, 2013). In regions where multiple fast directions are shown, splitting patterns exhibit a mix of trench-parallel, trench-perpendicular, and oblique fast directions.

  • Creator: Fabio Crameri
  • This version: 01.09.2021
  • License: Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
  • Specific citation: This graphic by Fabio Crameri after Crameri and Tackley (2014) and Long (2013) is available via the open-access s-Ink repository.
  • Related references:
    Crameri, F., and P.J. Tackley (2014), Spontaneous development of arcuate single-sided subduction in global 3-D mantle convection models with a free surface, J. Geophys. Res. Solid Earth, 119(7), 5921-5942, doi:10.1002/2014JB010939
    Long, M. D. (2013), Constraints on subduction geodynamics from seismic anisotropy, Rev. Geophys., 51, 76–112, doi:10.1002/rog.20008
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