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Analysis of an altered Siderite from Helton Beacon Lead Mine, near Appleby

Published online by Cambridge University Press:  14 March 2018

C. O. Trechmann
C. O. Trechmann*
Affiliation:
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Extract

It appeared of interest to determine the nature of the alteration which has changed the light greenish or brownish yellow siderite to the dark, almost perfectly black, glossy crystals so often seen on specimens from this neighbourhood.

The material, gathered from the heap of a mine, consisted of massive siderite, crystallised on its natural surfaces in the form of small curved primary rhombohedrons, and associated with quartz, pyrites, blende, and other minerals.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 6 , Issue 27 , July 1884 , pp. 52 - 53
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1884

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