Palaeoceanographic data of sediment core MD01-2416 ...
We present an SiF4 separation line, coupled to a laser fluorination system, which allows for an efficient combined silica d18O and d30Si analysis (50 min per sample). The required sample weight of 1.5-2.0 mg allows for high-resolution isotope studies on biogenic opal. Besides analytical tests, the n...
| Main Authors: | , , , , , , , , |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
PANGAEA
2013
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.1594/pangaea.834257 https://doi.pangaea.de/10.1594/PANGAEA.834257 |
| Summary: | We present an SiF4 separation line, coupled to a laser fluorination system, which allows for an efficient combined silica d18O and d30Si analysis (50 min per sample). The required sample weight of 1.5-2.0 mg allows for high-resolution isotope studies on biogenic opal. Besides analytical tests, the new instrumentation set-up was used to analyse two marine diatom fractions (>63 µm, 10-20 µm) with different diatom species compositions extracted from a Bølling/Allerød-Holocene core section [MD01-2416, North-West (NW) Pacific] to evaluate the palaeoceanographic significance of the diatom isotopic signals and to address isotopic effects related to contamination and species-related isotope effects (vital and environmental effects). While d30Si offsets between the two fractions were not discernible, supporting the absence of species-related silicon isotope effects, systematic offsets occur between the d18O records. Although small, these offsets point to species-related isotope effects, as bias by contamination ... : Supplement to: Maier, Edith; Chapligin, Bernhard; Abelmann, Andrea; Gersonde, Rainer; Esper, Oliver; Ren, Jian; Friedrichsen, Hans; Meyer, Hanno; Tiedemann, Ralf (2013): Combined oxygen and silicon isotope analysis of diatom silica from a deglacial subarctic Pacific record. Journal of Quaternary Science, 28(6), 571-581 ... |
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