Key data collected for the project
Cruise CAGE18-4 https://cage.uit.no/cruise/cage-cruise-18-4/
- 2 P-Cable 3D seismic volumes from the currently extinct (or reduced seepage activity) segment of the Vestnesa Ridge. The data is being used for a PhD student within SEAMSTRESS.
- 23 data sets from 4-component Ocean Bottom Seismic recorders (18 from Geomar, 5 from UiT) deployed around a gas seepage pockmark for P and S wave velocity analyses. The P-wave reflection data is being used by a PhD student based at Geomar to conduct a P-wave velocity tomography. The S-wave data is being used by a CAGE post doc to investigate anisotropy and local in situ stress field variations.
- (deployment) 7 long term OBS stations – 5 from Geomar, 2 from UiT (deployed for up to 1 year; some of Geomar instruments recorded only 4 months due to technical problems.
- 2D seismic lines associated to both the active and the passive source experiments
Cruise CAGE19-3 https://cage.uit.no/cruise/calypso-coring-in-the-fram-strait/
- 19 Calypso sediment cores (5 particularly key for the Seamstress project) and gravity cores
- Shear strength (measured on board for the calypso cores) and water content (only for some cores)
- Oedometer tests from 2 samples along 4 of the calypso cores (NGI)
- Triaxial tests from 2 samples along 2 of the calypso cores (NGI)
- Index test from 2 samples along 4 of the Seamstress calypso cores (NGI)
- MSCL and x-ray scanner of all the cores
- Sub bottom profiles over each calypso core
- 3 Piezometer Stations with in-situ pore fluid pressure and temperature (Ifremer – Sultan et al., 2020)
Cruise CAGE20-5 https://cage.uit.no/cruise/20-5/
- (recovery) 7 long term OBS stations along Vestnesa Ridge with variable distances from the seeping pockmarks – 5 from Geomar, 2 from UiT (deployed for up to 1 year but some of Geomar instruments recorded only 4 months due to technical problems). Data for the second PhD project within SEAMSTRESS
- (deployment) 10 long term OBS stations for the investigation of local seismicity at the faults north of the Knipovich ridge termination (Vestnesa Basin) – 8 from AWI, 2 from UiT.
- 2D seismic lines in the area for OBS related studies and as side surveys for the FRAME-IODP proposal
- 3D P-cable seismic volume from the Hummocky depression (known as the NKR depression) at the corner between the Knipovich ridge termination and the Molloy Transform Fault intersection
- 4 Piezometer stations (Ifremer) with in situ pressure and temperature down to 9 m
- 5 multi component Ocean Bottom Seismometers (Ifremer) that recorded over 3 days, distributed at controlled distance away from an active seepage pockmark (Lomvi)
- 27 Heat flow sites from the slope to the western termination of the Vestnesa Ridge
- 19 Chirp lines in the area
- (recovery) 10 long term OBS stations for the investigation of local seismicity at the faults north of the Knipovich ridge termination (Vestnesa Basin) – 8 from AWI, 2 from UiT. These data is for the second PhD project within SEAMSTRESS
- 2D high resolution seismic lines to complete the survey over outcropping faults and gravitational collapse features
- Repetition of bathymetry to investigate whether geomorphological changes can be spotted at gravitational collapse features over the last 10 years
- Active source experiment with 5 OBSs (3 AWI, 2 UiT) at the NKR Hummocky depression with particular focus on S-wave analyses and local stress field variations (comparison with the eastern Vestnesa ridge shear wave experiment and experiments by Exley et al. and Chabert et al., )