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A comparison of the Si/Al and Si/time wet-alkaline digestion methods for measurement of biogenic silica in lake sediments

Swann, George E.A.. 2010 A comparison of the Si/Al and Si/time wet-alkaline digestion methods for measurement of biogenic silica in lake sediments. Journal of Paleolimnology, 44 (2). 375-385. 10.1007/s10933-009-9308-9

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Abstract/Summary

Existing techniques for measuring sediment Biogenic Silica (BSi) concentrations rely largely on conventional (Si-only) wet-alkaline digestion methods. Although results have provided detailed palaeoenvironmental information, potential errors can arise in accounting for sources of non-BSi. Here, I compare a conventional Si-only method to a Si/Al wet-alkaline digestion method, which in theory provides a more robust correction for concentrations of non-BSi. Late glacial/Holocene-aged sediment from Lake Baikal, Russia was used for the comparison. Results showed no significant difference between the two techniques, indicating that existing Si-only BSi methods are suitable for reconstructing environmental changes when levels of digested non-BSi are low to moderate.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1007/s10933-009-9308-9
Programmes: BGS Programmes 2010 > NERC Isotope Geoscience Laboratory
ISSN: 0921-2728
Additional Keywords: Lake sediments, Lake Baikal, Russia
NORA Subject Terms: Earth Sciences
Date made live: 06 Aug 2010 09:16
URI: http://nora.nerc.ac.uk/id/eprint/10537

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