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Low-temperature thermal effects in natural volcanic glasses due to strain

Published online by Cambridge University Press:  14 March 2018

A. Ewart  and
M. Fieldes
A. Ewart
Affiliation:
New Zealand Geological Survey
M. Fieldes
Affiliation:
Soil Bureau, Department of Scientific and Industrial Research, New Zealand
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Summary

Sharp exothermic peaks occurring at about 90° C during D.T.A. treatment of natural volcanic glasses are described and are shown to be due to release of external strain. This is probably triggered by loss of surface water. No systematic variation in strain could be found in glass of different geological histories, but strain is found to decrease during natural weathering of volcanic glasses. Differences in weatherability of natural glasses may be related to degree of surface strain.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 33 , Issue 258 , September 1962 , pp. 237 - 246
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1962

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References

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