Dumke, Ines; Burwicz, Ewa; Berndt, Christian; Klaeschen, Dirk; Feseker, Tomas; Geissler, Wolfram H; Sarkar, Sudipta (2015): Seismic Data from MSM21/4 to Knipovich Ridge on the western Svalbard margin. PANGAEA, https://doi.org/10.1594/PANGAEA.847497, Supplement to: Dumke, I et al. (2016): Gas hydrate distribution and hydrocarbon maturation north of the Knipovich Ridge, western Svalbard margin. Journal of Geophysical Research: Solid Earth, 121(3), 1405-1424, https://doi.org/10.1002/2015JB012083
Always quote citation above when using data! You can download the citation in several formats below.
The seismic data were acquired north of the Knipovich Ridge on the western Svalbard margin during cruise MSM21/4. They were recorded using a Geometrics GeoEel streamer of either 120 channels (profiles p100-p208) or 88 channels (profiles p300-p805) with a group spacing of 1.56 m and a sampling rate of 2 kHz. A GI-Gun (2×1.7 l) with a main frequency of ~150 Hz was used as a source and operated at a shot interval of 6-8 s.
Processing of profiles p100-p208 and p600-p805: Positions for each channel were calculated by backtracking along the profiles from the GI-Gun GPS positions. The shot gathers were analyzed for abnormal amplitudes below the seafloor reflection by comparing neighboring traces in different frequency bands within sliding time windows. To suppress surface-generated water noise, a tau-p filter was applied in the shot gather domain. Common mid-point (CMP) profiles were then generated through crooked-line binning with a CMP spacing of 1.5625 m. A zero-phase band-pass filter with corner frequencies of 60 Hz and 360 Hz was applied to the data. Based on regional velocity information from MCS data [Sarkar, 2012], an interpolated and extrapolated 3D interval velocity model was created below the digitized seafloor reflection of the high-resolution streamer data. This velocity model was used to apply a CMP stack and an amplitude-preserving Kirchhoff post-stack time migration.
Processing of profiles p400-p500: Data were sampled at 0.5 ms and sorted into common midpoint (CMP) domain with a bin spacing of 5 m. Normal move out correction was carried out with a velocity of 1500 m s-1 and an Ormsby bandpass filter with corner frequencies at 40, 80, 600 and 1000 Hz was applied. The data were time migrated using the water velocity.
Median Latitude: 78.754722 * Median Longitude: 7.490028 * South-bound Latitude: 78.376500 * West-bound Longitude: 4.030670 * North-bound Latitude: 80.030830 * East-bound Longitude: 9.682000
Date/Time Start: 2012-08-17T20:16:00 * Date/Time End: 2012-09-03T17:08:00
Minimum Elevation: -4057.6 m * Maximum Elevation: -174.7 m
MSM21/4_548-1 (Seismic profile P100-P102) * Latitude Start: 78.544670 * Longitude Start: 9.682000 * Latitude End: 78.594000 * Longitude End: 8.477330 * Date/Time Start: 2012-08-17T20:16:00 * Date/Time End: 2012-08-18T08:15:00 * Elevation Start: -196.7 m * Elevation End: -909.8 m * Location: North Greenland Sea * Campaign: MSM21/4 * Basis: Maria S. Merian * Method/Device: Seismic reflection profile (SEISREFL)
MSM21/4_562-1 (Seismic profile P200-P208) * Latitude Start: 78.627170 * Longitude Start: 9.173830 * Latitude End: 78.526830 * Longitude End: 8.341000 * Date/Time Start: 2012-08-19T17:54:00 * Date/Time End: 2012-08-20T09:23:00 * Elevation Start: -490.2 m * Elevation End: -1296.0 m * Location: North Greenland Sea * Campaign: MSM21/4 * Basis: Maria S. Merian * Method/Device: Seismic reflection profile (SEISREFL)
MSM21/4_608-1 (Seismic profile P400, P500) * Latitude Start: 80.030830 * Longitude Start: 5.586170 * Latitude End: 79.582170 * Longitude End: 4.030670 * Date/Time Start: 2012-08-27T14:16:00 * Date/Time End: 2012-08-27T22:16:00 * Elevation Start: -922.1 m * Elevation End: -4057.6 m * Location: North Greenland Sea * Campaign: MSM21/4 * Basis: Maria S. Merian * Method/Device: Seismic reflection profile (SEISREFL)
|#||Name||Short Name||Unit||Principal Investigator||Method/Device||Comment|
|1||Event label||Event||Berndt, Christian|
|2||Date/Time of event||Date/Time||Berndt, Christian|
|3||Latitude of event||Latitude||Berndt, Christian|
|4||Longitude of event||Longitude||Berndt, Christian|
|5||Date/Time of event 2||Date/Time 2||Berndt, Christian|
|6||Latitude of event 2||Latitude 2||Berndt, Christian|
|7||Longitude of event 2||Longitude 2||Berndt, Christian|
|8||File name||File name||Berndt, Christian|
|9||File size||File size||kByte||Berndt, Christian|
|10||Uniform resource locator/link to sgy data file||URL sgy||Berndt, Christian|
|11||Comment||Comment||Berndt, Christian||seismic profile|
32 data points