Baseline radionuclide activities for sediment core SO268/1_5-1 (MUC-01) during R/V SONNE cruise SO268/1 in the CCZ, Pacific Ocean@en

This baseline dataset comprises downcore measurements of the activity of different radionuclides for a sediment core (MUC) 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.本基准数据集涵盖2019年在R/V SONNE号科考船SO268航次中，依托欧洲联合海洋计划（JPI Oceans）旗下MiningImpact（海洋采矿影响）合作项目所获取的沉积物岩芯（MUC）的岩芯纵向放射性核素活度测量数据。本次SO268航次的科研工作属于MiningImpact项目第二阶段（深海采矿的环境影响与风险）的组成部分，旨在评估太平洋克拉里昂-克利珀顿区（Clarion-Clipperton Zone, CCZ）多金属结核深海采矿的环境影响。沉积物经全酸消解处理后，在不来梅港亥姆霍兹极地与海洋研究中心阿尔弗雷德·魏格纳研究所海洋地球化学实验室，采用同位素稀释法结合ICP-SF-MS（赛默飞世尔科技Thermo Scientific Element2型仪器）完成放射性核素的定量分析。