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The geochemistry of loveringite, a uranium-rare-earth-bearing accessory phase from the Jimberlana Intrusion of Western Australia

Published online by Cambridge University Press:  05 July 2018

I. H. Campbell  and
P. R. Kelly
I. H. Campbell
Affiliation:
Department of Geology, School of Earth Sciences, University of Melbourne, Parkville, Victoria 3052, Australia
P. R. Kelly
Affiliation:
Department of Geology, School of Earth Sciences, University of Melbourne, Parkville, Victoria 3052, Australia
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Summary

The distribution and geochemistry of loveringite, an accessory Ti, Fe±Cr oxide containing U and rare-earth elements (Ln) from the Jimberlana Intrusion, have been studied. Loveringite is most abundant in bronzite cumulates; it is found in trace amounts in early plagioclase-augite-hypersthene cumulates, but is not found in the olivine cumulates or in the late-stage differentiates. Loveringites from the bronzite cumulates have a high Cr content compared with those from the plagioclase-augite-hypersthene cumulates, suggesting that the mineral is stabilized by the presence of Cr in the intercumulus liquid. The Ln pattern shows a strong depletion trend from La to Eu, a sharp reversal between Eu and Tb and a second depletion pattern from Tb to Lu. This pattern suggests that the Ln are substituting into two sites, one much larger than the other.

Type
Research Article
Information
Mineralogical Magazine , Volume 42 , Issue 322 , June 1978 , pp. 187 - 193
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1978

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Footnotes

*

Present address: Department of Geology, University of Toronto, Toronto, Canada M5S IAI.

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