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A notice of the occurrence of native arsenic in Cornwall ; of bismuthinite at Shap, Westmorland ; and of smaltite and niccolite at Coniston, Lancashire

Published online by Cambridge University Press:  14 March 2018

Arthur Russell
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Extract

Native arsenic has hitherto ranked as a distinctly doubtful British species. The following notes contain, however, an account of its occurrence at two localities in Cornwall. John Garbyin his ‘Catalogue of Minerals found in Cornwall’ states that native arsenic had been found in Dolcoath mine, Camborne, associated with ores of cobalt. Greg and Lettsom repeat this statement with a doubtful qualification. J. H. Collins also mentions Cooks Kitchen mine, Illogan, as another doubtful locality. The occurrence as an associate of smaltite and native bismuth, minerals that have on several occasions been found in Dolcoath, is by no means unlikely, although, as far as I have been able to ascertain, no specimens of native arsenic from any of these reported localities have been preserved.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 20 , Issue 108 , March 1925 , pp. 299 - 304
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1925

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References

Page 299 note 1 Garby, J., Trans. R. Geol. Soc. Cornwall, 1848, vol. 7, p. 86 Google Scholar.

Page 299 note 2 Greg, R. P. and Lettsom, W. G., Manual of the Mineralogy of Great Britain and Ireland. 1858, p. 869 Google Scholar.

Page 299 note 3 Collins, J. H., Mineralogy of Cornwall and Devon, 1871, part 2, p. 10 Google Scholar.

Page 301 note 1 Jannasch, p. and Seidel, T., Journ. prakt. Chem., 1915, set. 2, vol. 91, p. 133 CrossRefGoogle Scholar.

Page 301 note 2 James Sowerby in vol. 3 of his ‘British Mineralogy’, 18097 p. 175, plate 288, figures and describes a specimen of molybdenite with pyrite on red granite which he had received with some rock specimens from Kendal. There can be little doubt that this specimen was in reality from Shap and not ‘Coldbeck’ (Caldbeck), Cumberland, as stated in the text. At the Carrock mine, near , Caldbeck, molybdenite occurs in greisen, not granite.

Page 302 note 1 Harker, A. and Marr, J. E., The Shap granite. Quart. Journ. Geol. Soc. London, 1891, vol. 47, p. 285 Google Scholar.

Page 304 note 1 Goodchild, J. G., Contributions towards a list of the minerals occurring in Cumberland and Westmorland. Trans. Cumberland and Westmorland Assoc. Lit. Sci., 1885, no. 9, p. 195 Google Scholar.