Datasets from sediment cores collected from the Semenov Hydrothermal Field during the RRS James Cook cruises JC224 (2022) and JC254 (2023)
Data set information
| Query EDMED |
| General | |
| Data holding centre | British Oceanographic Data Centre |
| Country | United Kingdom  |
| Project | Ultramafic-hosted mineral Resource Assessment(ULTRA) |
| Time period | Sediment cores were collected during the RRS James Cook cruises JC224, which ran from the 3rd March to the 20th April 2022, and JC254, which ran from the 26th October to the 29th November 2023. The sediment cores are held at the British Ocean Sediment Core Research Facility (BOSCORF) for long-term storage. |
| Ongoing | No |
| Geographical area | Sediment cores were taken from the 13° N ocean core complex (OCC) region of the Mid-Atlantic Ridge where a number of seafloor massive sulphide deposits are known. This is also known as the Semenov Hydrothermal Field. |
| Observations | |
| Parameters | Carbonate chemistry in sediment pore waters; Geological sample density; Metal concentrations in sediment pore waters; Metal concentrations in sediment; Nutrient concentrations in sediment pore waters; Sediment resistivity; Inorganic chemical composition of sediment or rocks; Stable isotopes in sediment; Sediment water content, porosity and surface area; Geological sample magnetic, electrical and acoustic properties; Lithology; Sediment age |
| Instruments | Cameras; unconsolidated sediment corers; autoanalysers; titrators; inductively-coupled plasma mass spectrometers; mass spectrometers; gamma-ray spectrometers; X-ray fluorescence analysers; magnetic susceptibility systems; Volume measures; laboratory optical rangefinders |
| Description | |
| Summary | This dataset comprises a variety of sediment core data from the Semenov Hydrothermal Field region of the Mid-Atlantic Ridge, collected during RRS James Cook cruises JC224 (March - April 2022) and JC254 (October - November 2023). A total of 29 gravity cores, 9 mega-cores, and 25 push cores were successfully recovered. Analysis of the sediment core samples was conducted at the British Ocean Sediment Core Research Facility (BOSCORF), where the cores are held for long term storage, and included: imaging, spectrometry, geophysical and geochemical measurements of sediment and porewaters, radiocarbon dating, and stable isotope analysis. The main coring equipment used during both cruises was a gravity corer to collect sediment cores of up to 3 m in length. For JC224, a mega-core, with a USBL transponder attached to the frame, was used to obtain undisturbed cores from the upper 40 cm of the sediment surface. For JC254, push cores were also collected during several Remotely Operated Vehicle (ROV) dives using the Isis vehicle. The key objectives of the sediment coring were: (1) to reconstruct the history of the hydrothermal activity by dating plume fallout layers in the sedimentary record, and (2) to assess the role of the sediment cover in the preservation of seafloor massive sulphide (SMS) deposits in an ultra-slow spreading scenario. The data were collected as part of a PhD project funded under the Natural Environment Research Council (NERC) project Ultramafic-hosted mineral Resource Assessment (ULTRA) grant, NE/S004068/1. This collection consists only of the data collected under the PhD project and not all data associated with the ULTRA project. |
| Originators | British Ocean Sediment Core Research Facility British Oceanographic Data Centre |
| Data web site | http://www.bodc.ac.uk/data/bodc_database/nodb/data_collection/7376 |
| Availability | |
| Organisation | British Oceanographic Data Centre |
| Availability | Creative Commons Attribution 4.0 International |
| Contact | Polly Hadžiabdić (Enquiries Officer) |
| Address | British Oceanographic Data Centre |
| enquiries@bodc.ac.uk | |
| Administration | |
| Collating centre | British Oceanographic Data Centre |
| Local identifier | 1048ULTRA_sediment_core_data |
| Global identifier | 7376 |
| Last revised | 2025-09-03 |
