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Subduction Primer

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Old, slow slab tends to roll back, causing back arc extension ... overriding plate, which causes increased. coupling and continental thrusting. ... – PowerPoint PPT presentation

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Title: Subduction Primer


1
Subduction Primer
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Non-ideal Subduction
Oblique subduction causes strike-slip faulting
in upper pate. Typically, about half of the
transform component is partitioned onto
the strike-slip system
Plateau subduction (i.e., subduction of thick
ocean crust) causes subducted slab to
flatten, oftentimes right against the
overriding plate, which causes increased
coupling and continental thrusting. (slab
flattening happens because slab weight is
reduced by inclusion of low-density crust.)
Subduction near slab edge allows flow around
the slab edge, which results in slab
rollback.
and Plateau Subduction
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