Hydrophone component of Ocean bottom recording sgy-files of seismic refraction and wide angle data from profile 1172 and 2222 of expedition MGL1307 and POSEIDON cruise POS453 with links to data files ...

• Main Authors: Minshull, Tim A, Papenberg, Cord, Klaeschen, Dirk
• Format: Dataset
• Language: English
• Published: PANGAEA 2016
• Subjects: Event label; Optional event label; Date/Time of event; LATITUDE; LONGITUDE; DEPTH, water; Line; File name; File size; Uniform resource locator/link to sgy data file; Ocean bottom seismometer; Ocean bottom hydrophone; POS453; Poseidon; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.859069; https://doi.pangaea.de/10.1594/PANGAEA.859069

Hyperextension of continental crust at the Deep Galicia rifted margin in the North Atlantic has been accommodated by the rotation of continental fault blocks, which are underlain by the S reflector, an interpreted detachment fault, along which exhumed and serpentinized mantle peridotite is observed. West of these features, the enigmatic Peridotite Ridge has been inferred to delimit the western extent of the continent‐ocean transition. An outstanding question at this margin is where oceanic crust begins, with little existing data to constrain this boundary and a lack of clear seafloor spreading magnetic anomalies. Here we present results from a 160 km long wide‐angle seismic profile (Western Extension 1). Travel time tomography models of the crustal compressional velocity structure reveal highly thinned and rotated crustal blocks separated from the underlying mantle by the S reflector. The S reflector correlates with the 6.0–7.0 km s−1 velocity contours, corresponding to peridotite serpentinization of 60–30%, ... : COMM3D (POS453 & 458): Crustal Structure and Ocean Mixing observed with 3D Seismic Measurements.Galicia 3D Seismic (MGL1307): Seismic Study of the Galicia S Detachment.OBS/OBH were deployed during POSEIDON cruise POS453 and recovered during POSEIDON cruise POS458. Seismic profiles were aquired during expedition MGL1307 (doi: 10.1594/IEDA/320627). ...