%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