Journal article

Evaluating slab-plate coupling in the Indo-Australian plate

M Sandiford, D Coblentz, WP Schellart

GEOLOGY | GEOLOGICAL SOC AMER, INC | Published : 2005

Abstract

Distributed seismicity in the central Indian Ocean affords a unique opportunity to evaluate the extent of slab-plate coupling in the Indo-Australian plate. The mix of reverse-fault and strike-slip mechanisms in this region, with northwest-southeast to north-south maximum horizontal stress, SHmax, implies that the effective slab pull is no more than ∼10% of the total negative buoyancy operating on the subducting slab. Numerical models of the intraplate stress field predict a slab-pull component along the Sumatra and Java boundary segments of 2.82 ± 0.82 and 0.89 ± 0.35 × 1012 N·m-1, respectively. Mantle tomographic constraints coupled with insights from analogue modeling suggest that the diff..

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