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TitleA procedure for calculating the equilibrium distribution of trace elements among the minerals of cumulate rocks, and the concentration of trace elements in the coexisting liquids
AuthorBédard, J H
SourceChemical Geology vol. 118, 1994 p. 143-153, https://doi.org/10.1016/0009-2541(94)90173-2
Year1994
Alt SeriesGeological Survey of Canada, Contribution Series 15393
PublisherElsevier BV
Documentserial
Lang.English
Mediapaper; on-line; digital
File formatpdf
Subjectsgeochemistry; cumulus processes; whole rock analyses; trace element analyses; analyses; geochemical analyses; equilibrium; analytical methods
Illustrationsanalyses
AbstractWhole-rock trace-element analyses can be used in conjunction with partition coefficients and mineral modes to calculate a liquidus-temperature equilibrium distribution of trace elements among the constituent minerals of cumulate rocks. Once the concentration of a trace element in a given mineral phase is known, then the trace-element concentration in the liquid that was in equilibrium with this mineral can be calculated if certain assumptions are made about the temperature and major-element chemistry of the liquid. The effects of a trapped melt fraction (TMF) are accounted for by: (1) including in the calculation a phase (the trapped melt) with a mineral/melt partition coefficient of 1; and (2) adjusting the rock's mode to reflect removal of the TMF. The method yields results comparable to those given by mineral separation or in situ analysis for trace elements.
GEOSCAN ID202887

 
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