Hostname: page-component-cd9895bd7-gvvz8 Total loading time: 0 Render date: 2024-12-27T22:21:56.201Z Has data issue: false hasContentIssue false
  • English
  • Français

On the occurrence of niobium-tantalum and other rare-element minerals in the Meldon aplite, Devonshire

Published online by Cambridge University Press:  05 July 2018

Oleg von Knorring  and
Eric Condliffe
Oleg von Knorring
Affiliation:
Department of Earth Sciences, The University, Leeds LS2 9JT
Eric Condliffe
Affiliation:
Department of Earth Sciences, The University, Leeds LS2 9JT
Get access Rights & Permissions [Opens in a new window]

Abstract

A number of rare-element minerals from the Meldon aplite are described, e.g. native arsenic and antimony, arsenolite, stibiconite, and various niobium-tantalum minerals. Some of the minerals are new to the occurrence and some may be new to the British Isles. Particular attention has been paid to the Nb-Ta minerals and a large number of electron-microprobe analyses for manganocolumbite, manganotantalite, and microlite are presented. Examination of numerous, minute crystals and fragments of columbite-tantalite revealed a complex oscillatory zoning, indicating a slow rate of cooling and perhaps incomplete miscibility of the isomorphous columbite-tantalite series.

Type
Research Article
Information
Mineralogical Magazine , Volume 48 , Issue 348 , September 1984 , pp. 443 - 448
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1984

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Barsanov, G. P., Eremin, N. I., and Sergeeva, N. E. _ (1971) Doki. Akad. Nauk. SSSR. 20, 1195-8.Google Scholar
Cerny, P., and Harris, D. C. (1973) Can. Mineral. 11, 978-84.Google Scholar
Chaudhry, M. N. (1971) Mineral. Mag. 38, 179-85.CrossRefGoogle Scholar
Chaudhry, M. N. and Howie, R. A. (1969) Ibid. 37, 45-8.Google Scholar
Chaudhry, M. N. and Howie, R. A. (1970) Ibid. 717-20.Google Scholar
Chaudhry, M. N. and Flowie, R. A. (1973) Mineral. Mag. 39, 289-96.CrossRefGoogle Scholar
Chaudhry, M. N. and Flowie, R. A. (1976) Ibid. 40, 747-51.Google Scholar
Chaudhry, M. N. and Mahmoud, A. (1979) Ibid. 43, 307-9.Google Scholar
Dearman, W. R., and Claringbull, G. F. (1960) Ibid. 32, 577-8.Google Scholar
Greg, R. P., and Lettsom, W. G. (1858) Manual of the Mineralogy of Great Britain and Ireland.Google Scholar
Eid, A. S., and von Knorring, O. (1976) 20th ann. Rep. res. Inst. afr. Geol. University of Leeds, 56-8.Google Scholar
Kingsbury, A. W. G. (1966) In Present Views on Some Aspects of the Geology of Cornwall and Devon. R. geol. Soc. Cornwall, 247-66.Google Scholar
McLintock, W. F. P. (1923) Mineral. Mag. 20, 140-50.Google Scholar
Moss, A. A., Fejer, E. E., and Embrey, P. G. (1969) Ibid. 37, 414-22.Google Scholar
Quensel, P. (1956) Ark. Min. Geol. 2, 9–125.Google Scholar
Steiger, R., and von Knorring, O. (1975) J. Earth Sci. (Leeds). 8, 433-43.Google Scholar
Taylor, S. R., Heier, K. S., and Sverdrup, T. L. (1960) Norsk. Geol. Tidsskr. 40 (2), 133-56.Google Scholar
von Knorring, O. (1951) Mineral. Mag. 29, 799–801.Google Scholar
von Knorring, O. (1970) In African Magmatism and Tectonics (Clifford, T. N. and Gass, I. G., eds.). Oliver and Boyd, 157-84.Google Scholar
von Knorring, O. (1974) 17th ann. Rep. rest. Inst. afr. Geol. University of Leeds, 34-8.Google Scholar
von Knorring, O. and Fadipe, A. (1981) Bull. Mineral. 104, 496–507.Google Scholar
Worth, R. H. (1920) Q. J. Geol. Soc. 75, 77–114.CrossRefGoogle Scholar