Seismic:Reflection:MCS
Raw 2-D multi-channel seismic shot gathers (SEG-D) collected at the Chain transform fault during the 2018 ILAB-SPARC cruise
The data consists of two seismic profiles totalling 112 km collected during the ILAB-SPARC cruise aboard R/V Pourquoi Pas? from July to October 2018 at the eastern ridge-transform intersection of the Chain transform fault in the equatorial Atlantic Ocean. The profiles sample an 80-km long transform-parallel median ridge. During the survey, shots at 10 m depth were fired at a regular distance interval of 75 m and the pressure returns were recorded with a 6 km-long streamer towed at a depth of 15 m behind the ship containing 960 hydrophones at a group interval of 6.25 m. This geometry provided 40-fold seismic coverage with a common midpoint (CMP) interval of 3.125 m. Record length was 11 seconds and the sample rate was 2 ms. The source consisted of 16 airguns representing a total volume of 4990 cubic inches at 140 bars. Depth sensors and hydrophones were placed on the source array, enabling a control on depth and an estimation of the near-field source signature in real time during the acquisition. Additional details about the seismic data acquisition may be found in the accompanying cruise report. The two profiles are: (1) 37 km-long ILAB-SP08 collected from North to South containing 491 shots and (2) A 75-km long section of a 147 km-long profile ILAB-SP05 containing 1000 shots. The raw 2-D MCS shot gathers are in SEG-D format, bundled as TAR files, one for each profile. The data was generated as part of the project called Imaging Lithosphere Asthenosphere Boundary–St. Paul, Romanche and Chain (ILAB-SPARC). The ILAB-SPARC cruise was funded by the European Research Council Advanced grant no. 339442 TransAtlanticILAB awarded to Dr. Satish Singh.
Rohilla, Saksham
Investigator
IPGP
Singh, Satish
Investigator
IPGP
Carton, Hélène
Investigator
IPGP
Quality
0
Data have not been processed or modified since acquisition (e.g. Realtime navigation or sonar data, raw images etc.).
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