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Determination of uranium: carbon ratios in fluid inclusion decrepitates by inductively coupled plasma emission spectroscopy

Published online by Cambridge University Press:  05 July 2018

A. H. Rankin ,
D. H. M. Alderton ,
M. Thompson  and
J. E. Goulter
A. H. Rankin
Affiliation:
Department of Geology, Imperial College, London SW7 2BP
D. H. M. Alderton
Affiliation:
Department of Geology, Imperial College, London SW7 2BP
M. Thompson
Affiliation:
Department of Geology, Imperial College, London SW7 2BP
J. E. Goulter
Affiliation:
Applied Research Laboratories Ltd., Luton, Beds
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Abstract

Uranium has been detected in fluid inclusion decrepitates from quartz of several granites of the British Isles and from vein quartz associated with the Hcrcynian granites of SW England using ICP. Material, ejected from the inclusions during decrepitation on heating the sample, is transferred into the plasma for qualitative analysis via a stream of argon. Several other elements have been detected in the decrepitate, of which carbon is of particular interest. It shows a strong positive correlation with U and indicates the importance of C (presumably as carbonate complexes) in the transport of U in hydrothermal systems. Approximate order of magnitude estimates of the average U contents of fluid inclusions from the SW England samples, based on the assumption that U in the decrepitates is principally derived from the fluid inclusions, range from less than one to over a thousand ppm. Fluid inclusions may therefore be important in contributing to the levels of U reported in quartz (0.1 to 10 ppm).

Information

Type
Research Article
Information
Mineralogical Magazine , Volume 46 , Issue 339 , June 1982 , pp. 179 - 186
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1982

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Footnotes

*

Present address: Department of Geology, Chelsea College, 552 Kings Road, London SW10 0UA.

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