Baseline radionuclide activities for sediment core SO268/1_79-1 (MUC-19) 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.

本基准数据集包含了在2019年欧洲合作JPI Oceans MiningImpact项目框架下，于R/V SONNE巡航SO268期间采集的沉积物核心（MUC）中不同放射性核素活动的下孔测量数据。科学工作在SO268巡航期间属于MiningImpact项目的第二阶段（深海采矿的环境影响与风险），旨在评估太平洋克拉里昂-克列珀顿区（CCZ）多金属结核深海采矿的环境影响。经过总酸消化后，沉积物在阿尔弗雷德·魏格纳研究所海洋地质化学实验室（隶属于亥姆霍兹极地与海洋研究中心，布伦塔诺港）采用同位素稀释法结合ICP-SF-MS（Element2，赛默飞世尔科技）进行分析，以测定放射性核素。