Seismic data sets from the Namibian continental slope acquired on RV METEOR & RV MARIA S. MERIAN during cruise M49/1 & MSM19/1c


The data contain processed multichannel seismic data from the Namibia continental slope. Multichannel seismic data was acquired on R/V Meteor expedition M49/1 and on R/V Maria S. Merian expedition MSM19/1c using the high-resolution seismic acquisition system of the Department of Geosciences at the University of Bremen, Germany. During cruise M49/1, two Sercel GI-Guns were employed alternatingly, one with 2 x 1.7 L volume and another with 2 x 0.4 L chamber volume. The Syntron streamer used for recording consisted of a 600 m active section with 48 channels at 12.5 m spacing. During cruise MSM19/1c, the multichannel seismic data was acquired using a Sercel GI-Gun with a chamber volume of 2 x 1.7 L as seismic source. The recording unit consisted of a 100-m 16-channel Teledyne streamer with a channel spacing of 6.25 m. Shot interval was 10 s resulting in shot distances of ~25 m at a ship speed of ~5 kn. The employed seismic sources yield a frequency bandwidth of 30-400 Hz with a dominant frequency of ~150 Hz, resulting in a vertical resolution of the processed data (1/4 – 1/2 signal wavelength λ) of 2.5 - 5 m. Seismic processing was carried out with the commercial Schlumberger Vista Seismic Processing Software and interpretation with the IHS Kingdom Software package. The data were band-pass filtered, stacked and migrated with an emphasis on high resolution imaging and noise reduction. Velocity fields were picked interactively for NMO-correction and migration. CMP bin distance was set at 5 m.

Related Identifier References
Metadata Access
Creator Wenau, Stefan ORCID logo; Spieß, Volkhard; Zabel, Matthias ORCID logo
Publisher PANGAEA
Publication Year 2021
Funding Reference Deutsche Forschungsgemeinschaft, Bonn Crossref Funder ID EXC 309 Der Ozean im Erdsystem
Rights Creative Commons Attribution 4.0 International;
OpenAccess true
Resource Type Dataset
Format text/tab-separated-values
Size 70 data points
Discipline Earth System Research
Spatial Coverage (13.103W, -29.617S, 14.462E, -27.201N); South Atlantic Ocean
Temporal Coverage Begin 2001-01-06T11:50:00Z
Temporal Coverage End 2011-10-19T13:12:00Z