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Experimentally determined partition coefficients for minor and trace elements in peridotite minerals and carbonatitic melt, and their relevance to natural carbonatites

John Adam and Trevor Green
Experimentally determined partition coefficients for minor and trace elements in peridotite minerals and carbonatitic melt, and their relevance to natural carbonatites (in Eighth international symposium on Experimental mineralogy, petrology and geochemistry, Anonymous)
European Journal of Mineralogy (October 2001) 13 (5): 815-827

Abstract

A laser ablation microprobe coupled to an ICP-MS was used to determine K, Rb, Cs, Sr, Ba, Ti, Zr, Hf, Nb, La, Ce, Ho, Yb and Lu in garnet, clinopyroxene, amphibole and magnesiocarbonatitic melt produced at 1050 degrees C and 2.5 GPa from a synthetic composition designed to simulate the melting of natural peridotite. Crystal/melt partition coefficients were then used to calculate minor and trace element contents in a hypothetical carbonatitic melt equilibrated with a garnet-amphibole lherzolite of primitive mantle composition. The melt is strongly enriched in alkaline earths and REE relative to HFSE and alkalis, and plots within the compositional range of natural carbonatites. The fractionation of alkaline earths and REE from alkalis and HFSE, however, is usually larger in natural carbonatites than for the calculated composition. Processes in addition to peridotite melting (such as crystal fractionation, wall rock reactions and variations in source chemistry) are needed to fully account for the minor and trace element characteristics of carbonatites.


ISSN: 0935-1221
EISSN: 1617-4011
Serial Title: European Journal of Mineralogy
Serial Volume: 13
Serial Issue: 5
Title: Experimentally determined partition coefficients for minor and trace elements in peridotite minerals and carbonatitic melt, and their relevance to natural carbonatites
Title: Eighth international symposium on Experimental mineralogy, petrology and geochemistry
Author(s): Adam, JohnGreen, Trevor
Author(s): Anonymous
Affiliation: Macquarie University, Department of Earth and Planetary Sciences, Sydney, N.S.W., Australia
Pages: 815-827
Published: 200110
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
Meeting name: Eighth international symposium on Experimental mineralogy, petrology and geochemistry
Meeting location: Bergamo, ITA, Italy
Meeting date: 20000416April 16-19, 2000
References: 55
Accession Number: 2001-075357
Categories: Geochemistry of rocks, soils, and sedimentsIgneous and metamorphic petrology
Document Type: Serial Conference document
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2020, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
Update Code: 200123
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