Abstract
Dehydration-induced rheological heterogeneity and the deep tremor source in warm subduction zones
Highlights
Episodic tremor and slow slip (ETS) is observed in several subduction zones down-dip of the locked megathrust, and may provide clues for preparatory processes before megathrust rupture
We present data from an exhumed subduction shear zone that closely resembles the geologic environment of modern ETS, and discuss implications for the rock behavior that controls ETS
The co-stability of blueschist and eclogite at Kini is consistent with interpretations of the seismic lowvelocity layer (LVL) observed along the plate interface in many subduction zones, and that commonly coincides with the tremor source region (Song et al, 2009)
Summary
Episodic tremor and slow slip (ETS) is observed in several subduction zones down-dip of the locked megathrust, and may provide clues for preparatory processes before megathrust rupture. In contrast to the matrix blueschists, the eclogites are coarser-grained and massive, and exhibit dilational and shear fractures oriented at low to intermediate angles to the foliation
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