Nd isotope composition obtained on mixed planktonic foraminifera samples from core RECORD23 ...

• Main Authors: Colin, Christophe, Duhamel, Maxence
• Format: Dataset
• Language: English
• Published: PANGAEA 2021
• Subjects: AMS 14C ages; Mediterranean Sea; Nd isotope composition; Planktonic foraminifera; DEPTH, sediment/rock; AGE; Neodymium-143/Neodymium-144 ratio; Neodymium-143/Neodymium-144 ratio, standard deviation; ε-Neodymium; ε-Neodymium, standard deviation; Piston corer; ICP-MS, Thermo Scientific Neptune; calculated, 2 sigma
• Online Access: https://dx.doi.org/10.1594/pangaea.926909; https://doi.pangaea.de/10.1594/PANGAEA.926909

Neodymium isotopes were measured on mixed planktonic foraminifera from the washed >150 µm size fraction of the samples. The foraminifera tests were crushed between two glass slides to open chambers and fragments were ultrasonicated for 1 min in MilliQ water before pipetting out the suspended particles to separate the waste. This step was repeated until the water became clear and free of clay. Samples were checked under a binocular microscope to ensure that all sediment particles were removed, before they underwent a weak acid leaching for 5 min in 1 ml 0.001 M HNO3 with ultrasonication. After the cleaning step, samples were transferred into a 1.5 ml tube, soaked in 0.5 ml MilliQ water and dissolved using stepwise 100 µl 0.5 M HNO3 until the dissolution reaction stopped. The dissolved samples were centrifuged, and the supernatant was immediately transferred to Teflon beakers to prevent the leaching of any possible remaining phases. The solutions were then dried using a hotplate for Nd ...