Reflection imaging of aseismic zones of the Nazca slab by global-phase seismic interferometry

• DOI: 10.1190/int-2015-0225.1
• Publication Date: 2016-05-21T18:25:58Z
• Authors: Yohei Nishitsuji; Elmer Ruigrok; Martín Gomez; Kees Wapenaar; Deyan Draganov
• Keywords: Slab; Hypocenter; Receiver function; Reflection; Seismic interferometry

Obtaining detailed images of aseismic parts subducting slabs remains a large challenge for understanding slab dynamics. Hypocenter mapping cannot be used the purpose due to absence seismicity, whereas use receiver functions might compromised by presence melt. Global tomography can identify slab, but it does not reveal structure in detail. We have determined how obtained using global-phase seismic interferometry. The method provides high-resolution ([Formula: see text] depth) pseudo zero-offset (i.e., colocated source and receiver) reflection information. applied zones Nazca which initiation possible tearing plume decapitation was identified global electrical conductivity, respectively. an image Moho mantle found attenuated area consistent with dipping slab. However, our interpretation unambiguous. results confirmed that is useful imaging transects slabs.