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3D teleseismic travel time tomography along the Lesser Antilles subduction zone

Braszus, Benedikt


This study presents a 3D teleseismic P-wave travel time tomography model along the Lesser Antilles subduction zone. Located on the eastern boarder of the Caribbean plate the Lesser Antilles island arc formed during the last 40 Ma as a consequence of subduction of the relatively westwards moving North American and South American plates underneath the Caribbean plate. The location of the hereby generated triple junction is debated in current research and will be subject of this study. A joint inversion methodology is applied combining global and regional tomographic approaches. As an initial model the entire Earth’s mantle in discretized into spherical blocks with smaller block sizes for the area of investigation. Ray paths are calculated using a 3D pseudo-bending ray tracing algorithm yielding absolute travel times. They are correlated with absolute velocities of the subsurface by performing a LSQR inversion. The data consists of a filtered version of the global EHB catalogue and a manually processed set of 2604 travel times recorded on OBS stations deployed during the V oiLA project as well as on permanent land stations in the Caribbean region. ... mehr

Volltext §
DOI: 10.5445/IR/1000124003
Veröffentlicht am 29.09.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Geophysikalisches Institut (GPI)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Hochschulschrift
Publikationsdatum 28.09.2020
Sprache Englisch
Identifikator KITopen-ID: 1000124003
Verlag Karlsruher Institut für Technologie (KIT)
Umfang 83 S.
Art der Arbeit Abschlussarbeit - Master
Prüfungsdaten 12.06.2019
Schlagwörter teleseismic tomography, Lesser Antilles, Caribbean, P-wave tomography, travel time tomography, 3D tomography
Referent/Betreuer Rietbrock, Andreas
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