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Malayaite and tin-bearing garnet from a skarn at Gumble, NSW, Australia

Published online by Cambridge University Press:  05 July 2018

I. R. Mulholland
I. R. Mulholland*
Affiliation:
Department of Geology and Geophysics, University of Sydney, Sydney, NSW 2006, Australia
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Abstract

Malayaite and tin-bearing garnet occur within a skarn assemblage at Gumble, NSW. A metasomatic origin is proposed for these minerals under conditions of T = 300-500°C Xco2 < 0.30 and fO2 = 10−18 to 10−30 bars. Malayaite has formed as a result of reaction between a metasomatic fluid rich in Sn, F, H2O and silica, and tin-bearing andradite and wollastonite. The main requirements for tin-bearing skarn formation appear to be an F-Sn-rich granite, an iron-rich skarn assemblage, and a relatively long cooling history.

Type
Research Article
Information
Mineralogical Magazine , Volume 48 , Issue 346 , March 1984 , pp. 27 - 30
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1984

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Footnotes

*

Now at: Esso Australia Ltd., Minerals Department, 127 Kent Street, Sydney, NSW 2000, Australia.

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