Planktonic foraminifera, stable isotope record and temperature reconstruction of sediment core MD95-2040 ...

• Main Authors: de Abreu, Lucia, Shackleton, Nicholas J, Schönfeld, Joachim, Hall, Michael A, Chapman, Mark R
• Format: Dataset
• Language: English
• Published: PANGAEA 2003
• Subjects: DEPTH, sediment/rock; AGE; Globigerina bulloides, δ18O; Globigerina bulloides, δ13C; Neogloboquadrina pachyderma sinistral; Quartz; Carbonate, detritic/terrigenic; Volcanic components; Foraminifera; Ice rafted debris; Terrigenic minerals; Sea surface temperature, summer; Foraminifera, planktic, arctic; Foraminifera, planktic, subpolar; Foraminifera, planktic, subtropical; Foraminifera, planktic, tropical; Calypso Corer; Isotope ratio mass spectrometry; Counting >150 µm fraction; Modern analog technique MAT, SIMMAX28; MD101; Marion Dufresne 1995; International Marine Global Change Study IMAGES; Arctic; Carrara; Sira; Foraminifera*; Neogloboquadrina pachyderma; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.66811; https://doi.pangaea.de/10.1594/PANGAEA.66811

Stable isotope measurements were generally made on 30 specimens of the planktonic foraminifera species Globigerina bulloides picked from the 250-355 µm size fraction. Before analysis, the forams were treated with a 3 % solution of hydrogen peroxide to remove traces of organic contaminants, crushed and cleaned using an ultrasonic generator, rinsed in acetone and oven dried at 50°C. Depending on the sample size, they were analysed using different mass spectrometers and preparation systems. The larger samples were reacted with 100 % orthophosphoric acid at 90oC using a VG Isotech Isocarb common acid bath system, and the carbon dioxide produced during this reaction was then analysed by a VG Isotech SIRA - Series II mass spectrometer. For the smaller samples (less than100 micrograms) analyses were performed using a PRISM mass spectrometer with a Micromass Multicarb sample preparation system. The results were calibrated to VPDB using the repeated analysis of an internal carbonate standard (Carrara Marble). The ...