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CaSiO3 and CaTiO3 perovskite-melt partitioning of trace elements: Implications for gross mantle differentiation

Abstract:

We report the results of CaSiO3 perovskite-melt partitioning experiments conducted at conditions relevant to the uppermost lower mantle. Partition coefficients, measured by LA-ICPMS, show that CaSiO3 perovskite has a strong affinity for REE, Y, Th and U, making CaSiO3 the most likely host for these elements in the lower mantle. Comparison with the low-pressure analogue CaTiO3 shows that large ions partition similarly into the Ca-sites of the two perovskites. Thus CaTiO3 may be used as a model...

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Publication status:
Published

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Publisher copy:
10.1029/2001GL014398

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Institution:
University of Oxford
Department:
Oxford, MPLS, Earth Sciences
Journal:
GEOPHYSICAL RESEARCH LETTERS
Volume:
29
Issue:
19
Pages:
39-1
Publication date:
2002-10-01
DOI:
ISSN:
0094-8276
URN:
uuid:1d7efa05-91c7-4b01-b25f-d3401efb0d10
Source identifiers:
163763
Local pid:
pubs:163763
Language:
English

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