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On rhodonite and tephroite from Treburland manganese mine, Altarnun, Cornwall; and on rhodonite from other localities in Cornwall and Devonshire

Published online by Cambridge University Press:  14 March 2018

Arthur Russell
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Extract

Of the many small manganese deposits which have in the past been worked in both Cornwall and Devonshire that of Treburland is from the mineralogical point of view by far the most remarkable, its especial interest being due to the variety of minerals which it has afforded and to the fact that it and one other are the only manganese deposits in the west of England which are known to lie on the contact of igneous and sedimentary rocks and which have consequently been vitally affected by contact metamorphism.

The following observations are based on frequent visits to the spot since the year 1906, when I first stumbled across the locality, which, strange to say, has only received very cursory mention by the Geological Survey and has altogether escaped mention in mineralogical literature.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 27 , Issue 194 , September 1946 , pp. 221 - 235
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1946

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References

page 221 note 1 The occurrence of rhodonite at Treburland was communicated by me to the late Mr. J. H. Collins and is mentioned in his List of minerals found in Cornwall and Devon, with notes supplementary to the author's ‘Handbook’. Journ. Roy. Inst. Cornwall, 1911, vol. 18, p. 456.

page 223 note 1 Flink, G., Zeits. Kryst. Min., 1886, vol. 11, pl. 9, fig. 29.Google Scholar

page 227 note 1 Sowerby, J., British mineralogy. 1817, vol. 5, pp. 253–254, plate 536.Google Scholar

page 228 note 1 Hogg, T., A manual of mineralogy ; in which is shown how much Cornwall contributes to the illustration of the science. First edition, Truro, 1825, p. 88.Google Scholar

page 228 note 2 Phillips, W., An elementary introduction to the knowledge of mineralogy. Second edition, 1819, p. 184.Google Scholar

page 228 note 3 Greg, R. P. and Lettsom, W. G., Manual of the mineralogy of Great Britain and Ireland. 1858, p. 294.Google Scholar

page 228 note 4 English, H., A compendium of useful information relating to the companies formed for working British mines. 1826, pp. 40, 41, 43, 105, 106.Google Scholar

page 228 note 5 Boase, H. S., Contributions towards a knowledge of the geology of Cornwall. Trans. Roy. Geol. Soc. Cornwall, 1832, vol. 4, p. 233.Google Scholar

page 229 note 1 Krieger, P., Amer. Min., 1930, vol. 15, pp. 23–29. [M.A. 4–274.]Google Scholar

page 231 note 1 The Sims brothers, with headquarters at Slimeford, Calstock, Cornwall, were for many years (1860 to 1880) actively engaged in manganese mining in east Cornwall and Devonshire. Besides actually working many of the mines they bought ore from those belonging to others and had a manganese grading and distributing yard at Slimeford, the remains of which still exist. The ore was brought here by carts after having been hand-picked, and, if water permitted, washed, at the mines.

page 232 note 1 Hogg, T., A manual of mineralogy; in which is shown how much Cornwall contributes to the illustration of the science. First edition, Truro, 1825, p. 88.Google Scholar

page 232 note 2 Collins, J. H., Handbook to the mineralogy of Cornwall and Devon. 1871, p. 88.Google Scholar

page 233 note 1 Rev. Borlase, W., The natural history of Cornwall. 1758, p. 130.Google Scholar

page 233 note 2 Rev. Trist, S. J., Notes on the limestone rocks in the parish of Veryan. Trans. Roy. Geol. Soc. Cornwall, 1818, vol. 1, p. 112.Google Scholar

page 233 note 3 Mem. Geol. Survey, Special Reports on the Mineral Resources of Great Britain, vol. 1. Tungsten and manganese ores, 1915, p. 45.

page 233 note 4 Ibid., p. 45.

page 234 note 1 Mem. Geol. Survey, Special Reports on the Mineral Resources of Great Britain, vol. 1. Tungsten and manganese ores, 1915, p. 46.

page 234 note 2 Phillips, William, An Elementary Introduction to the knowledge of mineralogy. Second edition, 1819, p. 184.Google Scholar

page 234 note 3 Greg, R. P. and Lettsom, W. G., Manual of the mineralogy of Great Britain and Ireland. 1858, p. 294.Google Scholar

page 235 note 1 Tilley, C. E., Pyroxmangite from Inverness-shire, Scotland. Amer. Min., 1937, vol. 22, pp. 720–727. [M.A. 6–528.]Google Scholar

page 235 note 2 Sir C. L. Giesecke, A descriptive catalogue of a new collection of minerals in the Museum of the Royal Dublin Society, to which is added an Irish mineralogy. 1832, p. 251.