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Phosphoran olivine from Pine Canyon, Piute Co., Utah

Published online by Cambridge University Press:  05 July 2018

S. O. Agrell ,
N. R. Charnley  and
G. A. Chinner
S. O. Agrell
Affiliation:
Dept of Earth Sciences, Downing Street, Cambridge CB2 3EQ, UK
N. R. Charnley
Affiliation:
Department of Earth Sciences, Oxford, OX1 3PR, UK
G. A. Chinner
Affiliation:
Dept of Earth Sciences, Downing Street, Cambridge CB2 3EQ, UK
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Abstract

Olivines containing up to 6.1 wt.% P2O5 occur in association with apatite and an unnamed NaCaMg phosphate phase. Phosphoran olivine has been recorded only in pallasite meteorites and from one other terrestrial occurrence. The rarity of palpable phosphorus substitution for silicon may be related to the fact that in most terrestrial rocks, phosphorus is incorporated initially, and remains as, apatite; thus phosphorus excess in an undersilicated environment must be uncommon. However the highly capricious distribution of phosphorus in individual olivines from this and the meteoritic occurences suggests disequilibrium, and questions whether phosphoran olivine is ever stable relative to combinations of P-free olivine and phosphate/phosphide minerals.

Keywords

phosphorusolivineapatitePine CanyonUtah
Type
Research Article
Information
Mineralogical Magazine , Volume 62 , Issue 2 , April 1998 , pp. 265 - 269
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1998

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Footnotes

3

Died January 29, 1996

References

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