%0 Journal Article %T Fate of Forearc Lithosphere at Arc-Continent Collision Zones: Evidence From Local Earthquake Tomography of the Sunda-Banda Arc Transition, Indonesia %+ Ecole et Observatoire des Sciences de la Terre (EOST) %A Supendi, P. %A Nugraha, A. D. %A Widiyantoro, S. %A Abdullah, C. I. %A Rawlinson, N. %A Cummins, P. R. %A Harris, C. W. %A Roosmawati, N. %A Miller, M. S. %< avec comité de lecture %@ 0094-8276 %J Geophysical Research Letters %I American Geophysical Union %V 47 %8 2020 %D 2020 %Z 2020GeoRL..4786472S %R 10.1029/2019GL086472 %K tomography %K subduction %K collision %K earthquakes %K Indonesia %Z Sciences of the Universe [physics] %Z Sciences of the Universe [physics]/Earth SciencesJournal articles %X A new 3-D seismic P wave velocity model of the Sunda-Banda Arc Transition from local earthquake tomography reveals (i) northward subduction of oceanic lithosphere, associated with the convergence of Australia and Sundaland, as a high-velocity zone extending down to ~200 km depth; (ii) two distinct low-velocity zones, one immediately above the slab, which is likely a zone of partial melt, and one in the 0-40 km depth range, which is probably a magma chamber associated with active volcanoes above; and (iii) a northerly dipping high-velocity zone that bisects the two low-velocity anomalies, which we interpret as an underthrust forearc sliver of continental origin. Based on He3/He4 measurements from volcanic outflows, it is possible that the magma supply is contaminated by interaction with this forearc sliver as it ascends from the melt region below. %G English %2 https://insu.hal.science/insu-03707761/document %2 https://insu.hal.science/insu-03707761/file/Geophysical%20Research%20Letters%20-%202020%20-%20Supendi%20-%20Fate%20of%20Forearc%20Lithosphere%20at%20Arc%25u2010Continent%20Collision%20Zones%20Evidence%20From.pdf %L insu-03707761 %U https://insu.hal.science/insu-03707761 %~ INSU %~ CNRS %~ UNIV-STRASBG %~ SITE-ALSACE