Post-metamorphic low δ13C calcite in the Cycladic complex (Greece) and their implications for modeling fluid infiltration processes using carbon isotope compositions

J. Ganor, A. Matthews, M. Schliestedt

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29 Scopus citations

Abstract

Calcite veins and overgrowths with δ13C values of -12‰ to -8‰ and δ18O values of 24‰ to 27‰ are shown to be characteristic features of the Cyclades metamorphic complex of Greece. Field and petrographic characteristics and the marked carbon and oxygen isotope disequilibrium that the veins and overgrowths show with host metamorphic rocks indicate that they developed during post-metamorphic evolution of the complex. Carbon and oxygen isotopic compositions reported for the carbonate fraction of many pelitic schists on Naxos overlap with the range of these late carbonates and may in part reflect a contribution of this late calcite. Uncertainties regarding the origin of low δ13C values in the carbonates of metamorphic rocks shows that they must be used with caution as tracers of fluid-rock exchange. -from Authors

Original languageEnglish
Pages (from-to)365-379
Number of pages15
JournalEuropean Journal of Mineralogy
Volume6
Issue number3
DOIs
StatePublished - 1 Jan 1994
Externally publishedYes

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