Authigenic beryllium concentrations and ratios (10Be/9Be) of sediment core PS75/054-1

• Main Authors: Loftfield, Julia, Nowaczyk, Norbert R, Lembke-Jene, Lester, Frederichs, Thomas, Lachner, Johannes, Lamy, Frank, Rugel, Georg, Stübner, Konstanze, Adolphi, Florian
• Format: Dataset
• Language: English
• Published: PANGAEA
• Subjects: 10Be; 9Be; Accelerator mass spectrometry (AMS); AGE; Age model; ANT-XXVI/2; Authigenic Beryllium; Beryllium; Beryllium-10; standard deviation; Beryllium-10/Beryllium-9 ratio; Beryllium-9; Calculated; DEPTH; sediment/rock; Drake Passage; Inductively Coupled Plasma Optical Emission Spectroscopy; Thermo Fisher Inc.; ICP-OES-iCAP7400; KL; Laschamps Excursion; Mono Lake Excursion; paleomagnetism; Piston corer (BGR type); Polarstern; PS75/054-1; PS75 BIPOMAC; Scotia Sea; South Pacific; South Pacific Ocean; Pacific
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.980573

Core PS75/054-1 (subantarctic Pacific) was taken via piston corer during RV Polarstern cruise ANT-XXVI/4. We obtained high resolution records of authigenic 10Be/9Be ratios in order to study the different impacts on 10Be deposition in marine sediments compared to ice cores. As changes in the atmospheric production of cosmogenic 10Be leave a global fingerprint in 10Be deposition fluxes this represents a powerful tool for the synchronization of climate archives. During the Laschamps geomagnetic field low (~ 41 ka BP) the global production rate of 10Be is expected to double. We therefore chose the depth interval covering this period (1.80 m – 8.30 m). For Be measurements 0.5 – 1.0 g of freeze dried samples of the core were leached (Gutjahr et al., 2007), purified (Loftfield et al., 2024), and measured via ICP-OES (9Be) and AMS (10Be; Lachner et al., 2023 and Rugel et al., 2016).