Physics
Scientific paper
Jul 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3213307h&link_type=abstract
Geophysical Research Letters, Volume 32, Issue 13, CiteID L13307
Physics
1
Tectonophysics: Plate Boundary: General (3040), Tectonophysics: Subduction Zone Processes (1031, 3060, 3613, 8413), Tectonophysics: Volcanic Arcs
Scientific paper
We have developed a 3-D numerical model of obliquely subducting slab and mantle flow above. Using this model, we explore the effects of oblique subduction on the small-scale convection within the mantle wedge. We find that the spatial pattern and time dependent characteristics of oblique subduction are similar to those of non-oblique cases whose subduction speed is the same as the subduction velocity component normal to the strike of subducting slab. This also implies that the axes of rolls of small-scale convection are nearly normal to the plate boundary, assuming that the plate boundary represents the strike of subducting plate. Only when the back-arc lithosphere overlying the small-scale convection moves along the strike of subduction, a significant change of the orientation of roll axes is observed.
Honda Satoru
Yoshida Takeyoshi
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