Prestack depth migrated, multichannel seismic data, thickness maps and time-structure maps of the Baltic Sea sector of North German Basin

DOI

In the Late Cretaceous to Cenozoic, multiple inversion events affected Central Europe's intracontinental sedimentary basins. We investigate the impact of these inversion events on Zechstein salt structures formed prior to inversion based on seismic data located in the Baltic sector of the North German Basin. The study area covers the eastern Glückstadt Graben and the Bays of Kiel and Mecklenburg. We link stratigraphic interpretation to previous studies and nearby wells and present key seismic depth sections and thickness maps at a new level of detail. Prestack depth migrated seismic profiles are part of the BalTec dataset acquired during cruise MSM52 in march 2016 in the Baltic Sea. The seismic equipment consisted of an eight GI‐Gun cluster (45/105 in³) allowing for deep signal penetration with a relatively wide frequency bandwidth with a dominant frequency of 80 Hz. The streamer had an active cable length of 2,700 m with a minimum offset of 33 m. Seismic processing included τ‐p domain prestack predictive deconvolution, surface‐related multiple attenuation (SRME) to attenuate multiples, frequency filtering, amplitude recovery, noise reduction, and prestack depth migration. The time migrated seismic profile was acquired during a student marine excursion of the University of Hamburg in 2019, cruise AL526. A Mini-GI gun (true GI-mode with 15 in³ generator and 30 in³ injector volume) and a 48 channel streamer with 4m group spacing was used. Seismic data processing was analog to the depth sections, except for migration. Here, a poststack kirchhoff time migration was applied. For mapping, we used all available lines in the study and created time-structure maps by minimum curvature spline interpolation with a grid cell size of 300x300 m. By subtracting the top and bottom horizons, we created isochron maps (vertical thickness in two-way time) for the Zechstein, Cenomanian-Turonian, Coniacian-Santonian, Campanian, Maastrichtian-Danian, upper Paleocene, Eocene-Miocene units. We converted the time-isochron maps to vertical thickness in meter by using constant velocities derived from averaging the results of the refraction travel-time tomography.

BGR16-230_PSDM_Ahlrichs_etal_2021.sgy => Station: MSM52/124-1BGR16-232_PSDM_Ahlrichs_etal_2021.sgy => Station: MSM52/124-1BGR16-254_10000_16500_PSDM_Ahlrichs_etal_2021.sgy => Station: MSM52/137-1AL526_P20_Ahlrichs_etal_2021.sgy => Station: AL526_4 (see optional label)

Identifier
DOI https://doi.org/10.1594/PANGAEA.932928
Related Identifier https://doi.org/10.1111/bre.12617
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.932928
Provenance
Creator Ahlrichs, Niklas ORCID logo; Noack, Vera ORCID logo; Hübscher, Christian ORCID logo; Seidel, Elisabeth; Warwel, Arne ORCID logo; Kley, Jonas ORCID logo
Publisher PANGAEA
Publication Year 2021
Funding Reference Deutsche Forschungsgemeinschaft, Bonn https://doi.org/10.13039/501100001659 Crossref Funder ID 396852626 https://gepris.dfg.de/gepris/projekt/396852626 Der marine Sektor des Norddeutschen Beckens und der Tornquist Zone: Strukturelle Entwicklung und Fluidmigration
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Representation
Language English
Resource Type Dataset
Format text/tab-separated-values
Size 7 data points
Discipline Earth System Research
Spatial Coverage (10.175W, 54.207S, 15.216E, 54.655N); Baltic Sea
Temporal Coverage Begin 2016-03-15T18:47:00Z
Temporal Coverage End 2019-09-02T14:00:14Z