Baseline radionuclide activities for sediment core SO268/2_157-1 (GC-10) during RV SONNE cruise SO268/2 in the CCZ, Pacific Ocean

This baseline dataset comprises downcore measurements of the activity of different radionuclides for a sediment core (GC) 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.

本基准数据集囊括了在2019年R/V SONNE巡航SO268期间，欧洲合作JPI海洋采矿影响项目框架下所采集的沉积岩心（GC）中不同放射性核素活动的下岩层测量值。在SO268航次期间的科学研究构成了采矿影响项目第二阶段（海洋采矿的环境影响与风险）的一部分，旨在评估太平洋克拉里永-克利珀顿海盆（CCZ）多金属结核的深海采矿对环境的影响。经过总酸消化处理后，沉积物在阿尔弗雷德·魏格纳研究所的海洋地球化学实验室，隶属于赫尔姆霍兹极地与海洋研究中心（Bremerhaven），采用电感耦合等离子体质谱法（ICP-SF-MS，Element2，Thermo Scientific）进行同位素稀释分析，以测定放射性核素。