Baseline radionuclide activities for sediment cores taken during RV SONNE cruise SO268 in the CCZ, Pacific Ocean

• Main Authors: Volz, Jessica B, Lange, Mirko, Koehler, Dennis, Geibert, Walter, Stimac, Ingrid, Kasten, Sabine
• Format: Dataset
• Language: English
• Published: PANGAEA
• Subjects: AWI_MarGeoChem; Clarion Clipperton Fracture Zone; deep sea mining; deep sea sediment; Geochemical data; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; Marine Geochemistry @ AWI; Pacific; Alfred Wegener Institute
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.954786

This baseline dataset comprises downcore measurements of the activity of different radionuclides for sediment cores (GC, MUC, ROV-operated PUC) retrieved in the framework of the European collaborative JPI Oceans MiningImpact project onboard R/V SONNE cruise SO268 in 2019. The scientific work during cruise SO268 was part of the second phase of the MiningImpact project (Environmental impacts and risks of deep-sea mining) and is designed to assess the environmental impacts of deep-sea mining of polymetallic nodules in the Clarion-Clipperton Zone (CCZ) in the Pacific Ocean. After performing total acid digestions, the sediments were analyzed by isotope dilution using ICP-SF-MS (Element2, Thermo Scientific) for the determination of radionuclides at the Marine Geochemistry Lab, Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven.