HR: 0830h
AN: OS51C-0865    [PDF]
TI: A High Resolution Deep Towed Seismic Survey Across Mound Culebra, Costa Rica
AU: * Bialas, J
EM: jbialas@geomar.de
AF: GEOMAR, Wischhofstr. 1-3, Kiel, 24148 Germany
AU: * Bialas, J
EM: jbialas@geomar.de
AF: SFB-574, Wischhofstr. 1-3, Kiel, 24148 Germany
AU: Breitzke, M
EM: mbreitzke@geomar.de
AF: GEOMAR, Wischhofstr. 1-3, Kiel, 24148 Germany
AU: Breitzke, M
EM: mbreitzke@geomar.de
AF: SFB-574, Wischhofstr. 1-3, Kiel, 24148 Germany
AU: Fekete, N
EM: nfekete@geomar.de
AF: SFB-574, Wischhofstr. 1-3, Kiel, 24148 Germany
AU: Flueh, E E
EM: eflueh@geomar.de
AF: GEOMAR, Wischhofstr. 1-3, Kiel, 24148 Germany
AU: Flueh, E E
EM: eflueh@geomar.de
AF: SFB-574, Wischhofstr. 1-3, Kiel, 24148 Germany
AU: Klaucke, I
EM: iklaucke@geomar.de
AF: SFB-574, Wischhofstr. 1-3, Kiel, 24148 Germany
AU: Buerk, D
EM: dbuerk@geomar.de
AF: SFB-574, Wischhofstr. 1-3, Kiel, 24148 Germany
AU: Papenberg, C
EM: cpapenhagen@geomar.de
AF: GEOMAR, Wischhofstr. 1-3, Kiel, 24148 Germany
AU: Klaeschen, D
EM: dklaeschen@geomar.de
AF: GEOMAR, Wischhofstr. 1-3, Kiel, 24148 Germany
AU: Klaeschen, D
EM: dklaeschen@geomar.de
AF: SFB-574, Wischhofstr. 1-3, Kiel, 24148 Germany
AU: SO173-1 Work Group,
EM: jbialas@geomar.de
AF: GEOMAR, Wischhofstr. 1-3, Kiel, 24148 Germany
AU: SO173-1 Work Group,
EM: jbialas@geomar.de
AF: SFB-574, Wischhofstr. 1-3, Kiel, 24148 Germany
AB: In July 2003 RV SONNE conducted the SUBDUCTION II cruise SO173-1 offshore Costa Rica and Nicaragua. During this cruise the GEOMAR deep towed multichannel seismic streamer was used along several profiles studying mound structures at the continental margin of Middle America. Besides a survey area offshore Nicaragua (Breitzke et al.) sites of mound structures off Costa Rica were revisited. During earlier multichannel and wide angle seismic profiling with RV METEOR and RV SONNE a prominent mound structure of 150 m height was found and named Mound Culebra. During cruise SO173-1 multichannel deep towed seismic data as well as sidescan sonar data were recorded along 15 profiles, partly crossing one another. The major target Mound Culebra has been covered by 8 profiles which are offset by approximate 600 m. Additional lines with 1000 m offset cover the surrounding area where additional seafloor highs (additional mound structures) were identified from swath bathymetry. A BSR reflection is visible on all reflection seismic profiles with variable intensity. Within single fold seismic sections the BSR display becomes very weak underneath Mound Culebra, however final data processing has to proof if it can be traced continuously underneath the mound. ENE of Mound Culebra another seafloor high could be identified as a mound structure within seismic records. Again BSR patterns are clearly visible to both sides. An overview of the data and first results will be presented.
UR: http://www.geomar.de/projekte/sfb_574/index.html
DE: 3000 MARINE GEOLOGY AND GEOPHYSICS
DE: 3022 Marine sediments--processes and transport
DE: 3025 Marine seismics (0935)
DE: 3094 Instruments and techniques
SC: Ocean Sciences [OS]
MN: 2003 Fall Meeting