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The stilpnomelane group of minerals

Published online by Cambridge University Press:  14 March 2018

C. Osborne Hutton
C. Osborne Hutton*
Affiliation:
Department of Mineralogy and Petrology, University of Cambridge
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Extract

Work which has been in progress during the last few years on the low-grade regionally metamorphosed rocks of western Otago, New Zealand, has shown that members of the stilpnomelane group, hydrous iron- (or manganese-) rich silicates, are exceedingly widespread in rocks with the most varied mineral assemblages. In many cases the mineral in question is in sufficient quantity to rank as an essential constituent and may even be the most abundant one present. Hence in view of the importance of this mineral in the rocks of this region, it was considered that exact analytical data were necessary, and preliminary work in this connexion was carried out by Dr. F. J. Turner and the writer in 1934, but at that time, owing to the difficulties of separation, the pure minerals could not be obtained for analysis.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 25 , Issue 163 , December 1938 , pp. 172 - 206
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1938

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References

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