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Jacques Touret

Faciès granulite et fluides carboniques

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Abstract

Granulite facies rocks contain water deficient assemblages which occur in high grade metamorphic rocks (catazone) if PH2O is lower than Ptotal . A specific type of inclusionscontaining high density CO2 rich fluids is abundant in most samples from all over the world and interpreted as an evidence of a water free and carbonic (mainly CO2 , but possibly hydrocarbons) rich fluid phase during granulite facies metamorphism. The source of CO2 is essentially juvenile (upper mantle). From the location and features of granulite facies rocks, a model of the distribution of fluids within the continental crust is proposed, CO2 being concentrated in the lower part of the crust between Conrad and Mohorovičič discontinuities.

Om dit artikel te citeren:

Jacques Touret, «Faciès granulite et fluides carboniques», Annales de la Société géologique de Belgique [En ligne], Publications spéciales = special publications, Géologie des domaines cristallins - Centenaire de la Société géologique de Belgique, 1974, 267-287 URL : https://popups.ulg.ac.be/0037-9395/index.php?id=3724.

Over : Jacques Touret

Equipe de recherches « Equilibres entre fluides et minéraux », Université de Nancy I, C.O. 140, 54037 Nancy Cedex, France.