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Susceptibility to weathering of some Scottish rocks and their derived soils

Published online by Cambridge University Press:  03 November 2011

B. F. L. Smith ,
B. D. Mitchell  and
R. C. MacKenzie
B. F. L. Smith
Affiliation:
The Macaulay Institute for Soil Research, Craigiebuckler, Aberdeen AB9 2QJ, Scotland.
B. D. Mitchell
Affiliation:
The Macaulay Institute for Soil Research, Craigiebuckler, Aberdeen AB9 2QJ, Scotland.
R. C. MacKenzie
Affiliation:
The Macaulay Institute for Soil Research, Craigiebuckler, Aberdeen AB9 2QJ, Scotland.
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Abstract

The susceptibility of rocks to weathering into soils and the subsequent weathering of the solum itself are important both with respect to sediment formation and to agriculture. Residual soils developed on some rock types representative of the major soil associations of NE Scotland have consequently been examined in detail in an attempt to assess the weatherability of both the rocks and the derived soils. Methods based on chemical composition have been supplemented by potential methods related to the production of poorly-ordered aluminosilicate material and to depolymerisation of the silicate framework in the minerals present. In general, there is, as would be expected on the basis of increasing energy supply and increasing entropy, an increase in the amount of monomeric silica towards the surface and this appears to be closely related to the amount and nature of the poorly-ordered aluminosilicate. The results suggest that only the purely chemical methods can currently enable a reasonable assessment to be made of the susceptibility of a rock or soil to further weathering.

Keywords

andesitedioriteextractiongabbrogranitemajor elementmineralogypolymerisationprofilequartzitesandstoneserpentinitetranslocationtrimethylsilylation.
Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 73 , Issue 4 , 1983 , pp. 191 - 203
Copyright
Copyright © Royal Society of Edinburgh 1983

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