Planktonic foraminifera, stable isotope record and temperature reconstruction of sediment core MD95-2040 ...
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 a...
Main Authors: | , , , , |
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Format: | Dataset |
Language: | English |
Published: |
PANGAEA
2003
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Subjects: | |
Online Access: | https://dx.doi.org/10.1594/pangaea.66811 https://doi.pangaea.de/10.1594/PANGAEA.66811 |
Summary: | 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 ... |
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