10.1594/PANGAEA.954786Volz, Jessica BJessica BVolz0000-0002-7825-2174Lange, MirkoMirkoLangeKoehler, DennisDennisKoehlerGeibert, WalterWalterGeibert0000-0001-8646-2334Stimac, IngridIngridStimac0000-0001-6053-2330Kasten, SabineSabineKasten0000-0001-7453-5137PANGAEA2026Clarion Clipperton Fracture Zonedeep sea miningdeep sea sedimentGeochemical dataJPI Oceans - Ecological Aspects of Deep-Sea Mining (JPIO-MiningImpact)Marine Geochemistry @ AWI (AWI_MarGeoChem)2019-02-28T15:52:24/2019-04-26T18:59:34Publication Series of Datasets16 datasetsapplication/zipCreative Commons Attribution 4.0 InternationalThis 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.-125.9245167-117.012333311.8447666714.13508333Federal Ministry of Education and Researchhttps://doi.org/10.13039/50110000234703F0812FJPI-O MiningImpact: Auswirkungen von Manganknollenbergbau auf biogeochemische Prozesse und die Ausbreitung von Stoffen in der Tiefsee