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Silicon isotopes in allophane as a proxy for mineral formation in volcanic soils

Abstract:

Weathering of basaltic ash in volcanic areas produces andosols, rich in allophane and ferrihydrite. Since the rate of mineral formation is very useful in climate and geochemical modelling, this study investigates Si isotope compositions of allophane as a proxy for mineral formation. Allophane formed in contrasting conditions in five Icelandic soil profiles displays silicon isotope signatures lighter than the basalt in less weathered soils (-0.64 ± 0.15‰), and heavier in more weathered organic...

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Publication status:
Published

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Institution:
University of Oxford
Division:
MPLS
Department:
Earth Sciences
Role:
Author
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Journal:
APPLIED GEOCHEMISTRY
Volume:
26
Issue:
SUPPL.
Pages:
S115-S118
Publication date:
2011-06-01
DOI:
ISSN:
0883-2927
Source identifiers:
149898
Language:
English
Pubs id:
pubs:149898
UUID:
uuid:d0ed533e-7421-4ca4-92d6-139277c758c0
Local pid:
pubs:149898
Deposit date:
2012-12-19

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