PANGAEA_964713 2D multichannel seismic reflection processed data (GI Gun working area dataset) of RV MARIA S. MERIAN during cruise MSM84, Labrador Sea Lenz, Kai-Frederik; Gebhardt, Andrea Catalina; Gross, Felix; Lohrberg, Arne; Krastel, Sebastian 2D multichannel seismic reflection processed data (GI Gun working area dataset) of RV MARIA S. MERIAN during cruise MSM84, Labrador Sea 2024-02-27 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.964713 Investigator Kai-Frederik Lenz frederik.lenz@ifg.uni-kiel.de Earth Science Event label Binary Object Binary Object (Media Type) Binary Object (File Size) Binary Object (MD5 Hash) File content geoscientificInformation 2D seismic data MSM84 MSM84_35-1 MSM84_35-2 MSM84_45-1 MSM84_45-2 MSM84_55-1 MSM84_55-2 reflection seismics Seismic Seismic reflection profile Maria S. Merian 2019-07-02 2019-07-15 Complete 54.48508 57.87487 -60.69127 -55.36282 unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

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Bremen Bremen 28359 Germany online 12 data points text/tab-separated-values Gebhardt, Andrea Catalina; Ohlendorf, Christian; Gross, Felix; Matthiessen, Jens; Schneider, Ralph R (2020): Development of the Labrador Shelf During the Past Glaciations, Cruise No. MSM84, June 19 to July 16, 2019, St. John's (Canada) - St. John's (Canada). MARIA S. MERIAN-Berichte, Gutachterpanel Forschungsschiffe, MSM84, 78 pp, https://doi.org/10.2312/cr_msm84 Lenz, K-L; Gross, Felix; Kolling, Henriette Marie; Lohrberg, Arne; Couette, Pierre-Olivier; Ohlendorf, Christian; Schneider, Ralph R; Krastel, Sebastian; Gebhardt, Andrea Catalina (accepted): Geomorphological analysis of grounding-zone wedges reveals glacial retreat processes on the Labrador Shelf. Marine Geology, https://doi.org/10.1016/j.margeo.2024.107249 Lenz, Kai-Frederik: Ancillary navigational metadata (ukooa) from 2D multichannel seismic reflection processed data (GI Gun working area dataset) of RV MARIA S. MERIAN during cruise MSM84, Davis Strait. https://download.pangaea.de/reference/124070/attachments/anc_nav_ukooa_msm84_2D_mcs_processed_wad.zip

Three 2D reflection seismic profiles from three glacial cross-shelf troughs of the Labrador Shelf, namely the Okak, Makkovik and Cartwright troughs, are presented. The data were collected onboard the Maria S. Merian during cruise and MSM84 using two different multi-channel streamers; a Geometrics GeoEel solid state digital high-resolution streamer (active length 75 m, channel spacing 1.5625 m; hereafter short streamer) and a digital Sercel high-resolution streamer system (active length 600 m, channel spacing 3.125 m; hereafter long streamer). Details regarding the used seismic systems can be found in the cruise report (doi:10.2312/cr_msm84). Data were processed using the commercial VISTA Desktop Seismic Data Processing Software (Schlumberger, version 2018). The standard processing approach included demultiplexing, bulk shifting, frequency filtering (Ormsby as well as in the FK-domain), spiking deconvolution, compensation of spherical divergence and common-midpoint (CMP) binning. The CMP bin size was set to 3.125 m for both datasets. For the short streamer a normal-move-out correction with a constant sound velocity of 1500 ms-1 was performed as the limited offset range of short streamer did not allow for a precise velocity analysis. Afterwards, a static correction was applied as the short streamer was towed close to the water surface. Finally, a CMP stack was calculated followed by a finite differences time migration. The dataset of the long streamer shows a strong receiver ghost, which is related to the tow depth of approximately 10 m below the water surface. This receiver ghost was suppressed. Afterwards, a data-driven velocity analysis was carried out by picking seismic velocities for every 500 CMPs. Normal-move-out correction, CMP stacking and a finite differences time migration were carried out using the velocity field. Finally, a white noise removal was performed. The objective of data recording on the Labrador Shelf is to map glacial landforms and reconstruct the dynamics of the Laurentide Ice Sheet in detail. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.964713"! ** Ship time for the cruise MSM84 was funded by the DFG under the award MerMet 17-49, Gebhardt, LABRADOR-GLACIALS.

https://doi.org/10.1016/j.margeo.2024.107249 Geomorphological analysis of grounding-zone wedges reveals glacial retreat processes on the Labrador Shelf https://doi.org/10.2312/cr_msm84 Development of the Labrador Shelf During the Past Glaciations, Cruise No. MSM84, June 19 to July 16, 2019, St. John's (Canada) - St. John's (Canada) https://en.wikipedia.org/wiki/RV_Maria_S._Merian Maria S. Merian DIF 9.4 2024-02-27 2026-06-17