Baseline radionuclide activities for sediment core SO268/1_74-1 (MUC-17) during RV SONNE cruise SO268/1 in the CCZ, Pacific Ocean

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.

本基线数据集包含了在2019年R/V SONNE巡航SO268框架下，欧洲联合JPI Oceans MiningImpact项目中提取的沉积物（MUC）中不同放射性同位素活动的下钻测量数据。在SO268巡航期间的科学研究构成了MiningImpact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-克列珀顿海盆（CCZ）多金属结核深海采矿的环境影响。经过总酸消化处理后，沉积物在阿尔弗雷德·魏格纳研究所海洋地球化学实验室（隶属于亥姆霍兹极地与海洋研究中心，布伦塔诺港）采用同位素稀释法，通过电感耦合等离子体质谱法（ICP-SF-MS，Element2，赛默飞世尔科技）对放射性同位素进行测定。