Sediment characteristics in the sediment trap of the mooring during RV SONNE cruise SO304

DOI

The Swatch of No Ground (SoNG) submarine canyon links the world's largest and most populated delta (the Ganges-Brahmaputra-Meghna river delta), with the Earth's largest deep-sea sedimentary system (the Bengal Fan). In order to investigates the near-bed sediment dynamics in the SoNG, a mooring system was deployed in the SoNG at 590 m water depth from 13 to 31 March 2024 (18-day deployment) during the SO304 cruise onboard the R/V SONNE. This mooring was equipped with a PPS4/3-24S sediment trap at 72 m above the seafloor (masf), programmed to collect one sample (one bottle) per day, with collecting area of 0.05 m2. The dry weight, settling flux, median grain size (D50), mean grain size, sorting, skewness, kurtosis, and organic carbon content of the sediment in the trap were measured at MARUM. Grain size was measured using a Beckman Coulter Laser Diffraction Particle Size Analyzer LS 13320, after boiling the material with Na4P2O7·10H2O to disperse aggregates. Bottles 3–4, and 10–11 were pooled due to low particle mass. Total organic carbon content (TOC) was determined by acidifying ~100 mg of freeze-dried, powdered sediment with 12.5% HCl to remove the carbonate portion, followed by programmed pyrolysis on a LECO CS 744 carbon analyzer.

Identifier
DOI https://doi.pangaea.de/10.1594/PANGAEA.992614
Related Identifier References https://doi.org/10.48433/cr_so304
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.992614
Provenance
Creator Liu, Meng ORCID logo; Cornard, Pauline (ORCID: 0000-0002-5034-937X); Kockisch, Brit; Wei, Bingbing ORCID logo; Schwenk, Tilmann ORCID logo; Spieß, Volkhard; Miramontes, Elda ORCID logo
Publisher PANGAEA
Publication Year 2026
Rights Creative Commons Attribution 4.0 International; Data access is restricted (moratorium, sensitive data, license constraints); https://creativecommons.org/licenses/by/4.0/
OpenAccess false
Representation
Resource Type Bundled Publication of Datasets; Collection
Format application/zip
Size 2 datasets
Discipline Earth System Research
Spatial Coverage (89.399 LON, 21.168 LAT)
Temporal Coverage Begin 2024-03-14T00:00:00Z
Temporal Coverage End 2024-03-30T00:00:00Z