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Cosalite and other lead sulpho-salts at Grainsgill, Carrock Fell, Caldbeck, Cumberland

Published online by Cambridge University Press:  14 March 2018

Arthur W. G. Kingsbury  and
J. Hartley
Arthur W. G. Kingsbury
Affiliation:
Department of Geology and Mineralogy, University Museum, Oxford
J. Hartley
Affiliation:
Department of Geology, University of Leeds
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Summary

Cosalite, aikinite, zinckenite, jamesonite, and boulangerite occur at Grainsgill; the first three minerals have not hitherto been recorded from Britain. The specimens probably come from a series of low-temperature quartz-carbonate veins, later than the original mineralization and also distinet from the east west copper-lead veins.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 31 , Issue 235 , December 1956 , pp. 296 - 300
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1956

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References

page 296 note 1 Greg, R. P. and Lettsom, W. G., Manual of Mineralogy of Great Britain and Ireland, London, 1858, p. 375.Google Scholar

page 296 note 2 As the result of our investigatioas ia the Lake District, it has hecomc abundantly clear that most of the so-called localities, suoh as ‘Carrock Fells’, ‘Carrock Fell’, ‘Brandy Gill’, ‘Roughtengill’, ‘Caldbeck Fell(s)’, which are given in many of the older records and on labels with old specimens, are used in such a wide and loose manner that they cannot in general be accepted as evidence of a more precise place of origin than the Skidddaw-(Carroek-Caldbeck area as a whole, and must all be regarded as synonymous. Compare Creg and Lettsom's to bismuth at ‘Caldbeck Fells’ (p. 378), bismuthinite at ‘Braudy Gill, Carrock Fells’ (p. 380), and molybdenite, at five different localities (p. 349) ; all these are to one locality.

page 296 note 3 Hall, T. M., The Mineralogist's Directory, London, 1868, p. 53.Google Scholar

page 296 note 4 Postlethwaite, J., Mines and Mining in the Lake District, 3rd edn, Whitehaven, 1913, p. 60.Google Scholar

page 297 note 1 Hitehen, C. S., Quart. Journ. Geol. Soe. London, 1934, vol. 90, p. 158.Google Scholar

page 300 note 1 Greg and Lettsom, loc. cit., p. 354 ; L. J. Spencer, Min. Nag. 1937, vol. 24, p. 601.Google Scholar