SEMum_NA14

The SEMum_NA14 inversion. (A) Source and station distribution for the tomographic inversion. Thick black line indicates the boundaries used for the RegSEM forward simulation, and the thin gray polygon indicates our model region in which the Vs and ξ structure is determined. Background shows the topography. (B) 3D isotropic shear wave velocity structure at 70km, shown as variations with respect to the regional mean (See Fig 2 in Yuan et al, 2014 for details). Locations of two depth cross-sections shown in© and (d) are indicated. Red dots indicate 10° distance mark on the x-axis along each transect. See Yuan et al., 2014 for details geological features and locations. (C) Depth cross-section of isotropic Vs (top subpanel) and radial anisotropy variation (bottom subpanel) for Profile A. Features marked are: GSL, Great Slave Lake suture zone; THO, Trans-Hudson Orogen; MCR, Mid-continent Rift; GF, Grenville deformation Front; ERM, eastern continental rift margin. Coastline is indicated. Note the correlation of negative ξ anomaly under all sutures. (D) Same as© but for Profile B. GRP, Granite-Rhyolite Province; MTP, Mazatzal Province; YAP, Yavapai Province; MCR, Mid-continent Rift; THO, Trans-Hudson Orogen; and NQ, New Quebec Orogen.

The model file can be downloaded from IRIS EMC

Citations and DOIs

To cite the original work behind this Earth model:

  1. Yuan, H., French, S., Cupillard, P., Romanowicz, B., 2014. Lithospheric expression of geological units in central and eastern North America from full waveform tomography. Earth Planet Sc Lett. 402, 176–186, https://doi.org/10.1016/j.epsl.2013.11.057.

References

  1. Cupillard Cupillard, P., Delavaud, E., Burgos, G., Festa, G., Vilotte, J.-P., Capdeville, Y., Montagner, J.-P., 2012. RegSEM: a versatile code based on the spectral element method to compute seismic wave propagation at the regional scale. Geophys. J. Int. 188, 1203-1220.
  2. French, S.W., Romanowicz, B.A., 2014. Whole-mantle radially anisotropic shear velocity structure from spectral-element waveform tomography. Geophys. J. Int. 199, 1303-1327.
  3. Lekić, V., Romanowicz, B., 2011. Inferring upper-mantle structure by full waveform tomography with the spectral element method. Geophys. J. Int. 185, 799-831.
  4. Li, X., Romanowicz, B., 1996. Global mantle shear velocity model developed using nonlinear asymptotic coupling theory. J. Geophys. Res 101, 22245-22273.
  5. Li, X.-D., Romanowicz, B., 1995. Comparison of global waveform inversions with and without considering cross-branch modal coupling. Geophys. J. Int. 121, 695-709.
  6. Montagner, J.-P., Griot-Pommera, D.-A., Lave, J., 2000. How to relate body wave and surface wave anisotropy? J. Geophys. Res. 105, 19,015-019,027.
  7. Romanowicz, B., Yuan, H., 2012. On the interpretation of SKS splitting measurements in the presence of several layers of anisotropy. Geophys. J. Int. 188, 1129-1140.
  8. Yuan, H., French, S., Cupillard, P., Romanowicz, B., 2014. Lithospheric expression of geological units in central and eastern North America from full waveform tomography. Earth Planet Sc Lett. 402, 176–186.