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Slab detachment of subducted Indo-Australian plate beneath Sunda arc, Indonesia

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Abstract

Necking, tearing, slab detachment and subsequently slab loss complicate the subduction zone processes and slab architecture. Based on evidences which include patterns of seismicity, seismic tomography and geochemistry of arc volcanoes, we have identified a horizontal slab tear in the subducted Indo-Australian slab beneath the Sunda arc. It strongly reflects on trench migration, and causes along-strike variations in vertical motion and geochemically distinct subduction-related arc magmatism. We also propose a model for the geodynamic evolution of slab detachment.

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  1. National Geophysical Research Institute, Council of Scientific and Industrial Research, Uppal Road, Hyderabad, 500 007, India

    Bhaskar Kundu & V K Gahalaut

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  1. Bhaskar Kundu
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  2. V K Gahalaut
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Correspondence to Bhaskar Kundu.

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Kundu, B., Gahalaut, V.K. Slab detachment of subducted Indo-Australian plate beneath Sunda arc, Indonesia. J Earth Syst Sci 120, 193–204 (2011). https://doi.org/10.1007/s12040-011-0056-7

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  • DOI: https://doi.org/10.1007/s12040-011-0056-7

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