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Published byTrevor Johnson Modified over 9 years ago
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New bathymetric data (Marion Dufresne July 2008)
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New bathymetric data (Marion Dufresne July 2008)
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New bathymetric data (Marion Dufresne July 2008)
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Depth to basement map [MCS and OBS data] (Thiebot and Gutscher, 2006)
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Sediment thickness map - W of Gibraltar (Gutscher et al., accepted Tectonophys.)
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Depth to Moho map (Gutscher et al., accepted Tectonophys.)
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Crustal thickness map [S. Iberia - N. Morocco] (Gutscher et al., accepted Tectonophys.)
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Extent of oceanic crust ?
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Proposed OBS lines
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Proposed OBS lines, SWIM bathymetry and MCS lines
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Regional seismicity (PDE Catalog 1973-2008)
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Seismicity (29 Aug 2007 - 31 July 2008) (recorded by land stations) SWIM 2008 Cruise Report (L. Matias)
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Seismicity (29 Aug 2007 - 31 July 2008) within 75 km of OBS-BB network SWIM 2008 Cruise Report (L. Matias)
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Proposed OBS lines
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Proposed OBS lines P1: - too long / too many deployments, total 36 (thus compromising other lines) [10 OBS in Tagus, 6 on and S of thrust belt, 3 overlap SISMAR OBS] - very deep water (very long recovery time) Tagus 5000m, HAP 4800m, SAP 4200m - little new info on crustal types (except perhaps Tagus) - 50% of line has no seismicity, and is distant from OBS-BB network
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Proposed OBS lines P2: - shortest distance between the SW Iberian (continental) margin and the NW Moroccan (continental margin) crossing thin crust of uncertain type - passes along existing high quality MCS profile (pre-stack depth migrated) - crosses Marq. Pombal and the toe of the accretionary wedge (potentially seismogenic structures)
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Free-air gravity anomaly (and SISMAR seismic profiles)
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Kinematic reconstruction 195Ma (Sahabi et al., 2004)
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Kinematic reconstruction 195Ma (Sahabi et al., 2004) w. magnetic anomalies (from Verhoef et al., 1991)
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Magnetic anomaly maps (Verhoef et al., 1991)
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Magnetic anomaly maps Iberian aero-mag map (left) (Verhoef et al., 1991 - below)
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Extent of oceanic crust ?
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