Baseline pore-water nutrients, cations and DIC for sediment core SO268/2_158-1_PUC-51 during RV SONNE cruise SO268/2 in the CCZ, Pacific Ocean

• Main Authors: Volz, Jessica B, Lange, Mirko, Koehler, Dennis, Geibert, Walter, Stimac, Ingrid, Kasten, Sabine
• Format: Dataset
• Language: English
• Published: PANGAEA
• Subjects: Aluminium; error; Ammonium; relative; Area/locality; Arsenic; AWI_MarGeoChem; Barium; Calcium; Carbon; inorganic; dissolved; Clarion-Clipperton Fraction Zone; North East Pacific Ocean; Clarion Clipperton Fracture Zone; Copper; Core; deep sea mining; deep sea sediment; DEPTH; sediment/rock; Geochemical data; ICP-AES; Thermo Scientific; iCAP 7400; Iron; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; Magnesium; Manganese; Marine Geochemistry @ AWI; Nitrate; Alfred Wegener Institute
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.943945

This baseline dataset comprises downcore measurements of pore-water nutrients, cations and DIC for a sediment core (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. The pore water was extracted onboard by rhizon sampling. Pore-water nutrient concentrations (nitrate, nitrite, ammonium, silicic acid, phosphate) were analyzed onboard on freshly extracted pore water upon 3-fold dilution or undiluted (ammonium) using a QuAAtro continuous segmented flow analyzer (Seal Analytical). Major and minor elements were determined on acidified samples (25 µL double sub-boiling distilled concentrated HCl per 1 mL sample) using ICP-AES (iCAP 7400, Thermo Scientific) and DIC was determined on HgCl2-treated pore-water samples using a QuAAtro continuous segmented flow analyzer (Seal Analytical) at the Marine Geochemistry Lab, Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven.