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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.

Information

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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