000K utf8 1100 $c2007 1500 ger 2050 urn:nbn:de:gbv:8-diss-19055 3000 Berhorst, Arnim 4000 Die Struktur des aktiven Kontinentalhangs vor Nicaragua und Costa Rica: marin-seismische Steil- und Weitwinkelmessungen$hChristian-Albrechts-Universität zu Kiel [Berhorst, Arnim] 4030 Kiel$nChristian-Albrechts-Universität zu Kiel 4209 This work constrains the structure of the active margin off Nicaragua and Costa Rica through the analysis of two coincident seismic reflection and refraction profiles. The modelling of the combined seismic datasets verified the structure and the P-wave velocities of the subducted oceanic Cocos Plate and the caribbean continental margin for an area ranging from central Nicaragua to neighboring Costa Rica. The existence of a shallow mantle sliver lying under the nicaraguan shelf is confirmed. Comparing the data presented in this study with gravity data and magnetic anomalies serves as a strong indication of an accreted terrain stretching as far as Guatemala. The imaging of deep cutting faults into the mantle, the modelling of low P-wave velocities of 7.2-7.8 km/s and a high Poisson ratio of 0.3 in the mantle, and gravity modelling support the assumption of a partially serpentinised mantle at the outer rise. Refraction data indicate a thickness of 3-13 km for this layer. 4950 https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-19055$xR$3Volltext$534 4961 https://macau.uni-kiel.de/receive/diss_mods_00001905 5051 550 5550 Central America 5550 Geologie 5550 Kontinentalabhang 5550 Mantle Sl 5550 Margin Wedge 5550 Nicaragua 5550 P-Wave Structure 5550 Reflection Seismics 5550 Refraction Seismics 5550 Seismologie 5550 Subduction Zone