K Rb fractionation by plagioclase feldspars

V. Rama Murthy, W. L. Griffin

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Calcic plagioclases from basaltic-gabbroic rocks and anorthosites exhibit a strong fractionation of K and Rb. The trend of K Rb ratio with K content is similar to that shown by oceanic tholeiites. Such a K-Rb relationship is not shown by metamorphic plagioclase. High K Rb ratios in gabbroic or anorthositic rocks may not indicate a "mantle" origin but may only reflect partitioning of K and Rb between liquid and plagioclase. The K Rb ratios in stone meteorites appear to be largely controlled by their constituent plagioclase.

LanguageEnglish
Pages265-271
Number of pages7
JournalChemical Geology
Volume6
Issue numberC
DOIs
Publication statusPublished - 1970
Externally publishedYes

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Fractionation
plagioclase
fractionation
Rocks
Meteorites
anorthosite
rock
meteorite
partitioning
mantle
liquid
Liquids

Cite this

Murthy, V. Rama ; Griffin, W. L. / K Rb fractionation by plagioclase feldspars. In: Chemical Geology. 1970 ; Vol. 6, No. C. pp. 265-271.
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K Rb fractionation by plagioclase feldspars. / Murthy, V. Rama; Griffin, W. L.

In: Chemical Geology, Vol. 6, No. C, 1970, p. 265-271.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Griffin, W. L.

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