Large calcite and bulk-rock volume loss in metacarbonate xenoliths from the Qu,rigut massif (French Pyrenees)
Détails
Etat: Public
Version: Final published version
Licence: Non spécifiée
It was possible to publish this article open access thanks to a Swiss National Licence with the publisher.
ID Serval
serval:BIB_912CB14AFFD1
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Large calcite and bulk-rock volume loss in metacarbonate xenoliths from the Qu,rigut massif (French Pyrenees)
Périodique
Contributions to Mineralogy and Petrology
ISSN-L
0010-7999
Statut éditorial
Publié
Date de publication
2009
Peer-reviewed
Oui
Volume
157
Pages
749-763
Langue
anglais
Résumé
Chemical mass transfer was quantified in a metacarbonate xenolith
enclosed within the granodiorite of the Qu,rigut massif (Pyrenees,
France). Mass balance calculations suggest a strong decrease of CaO, SrO
and CO(2) contents (up to -90%), correlated with a decrease of modal
calcite content as the contact is approached. Most other chemical
elements behave immobile during metasomatism. They are therefore
passively enriched. Only a small increase of SiO(2), Al(2)O(3) and
Fe(2)O(3) contents occurs in the immediate vicinity of the contact.
Hence, in this study, skarn formation is characterized by the lack of
large chemical element influx from the granitoid protolith. A large
decrease of the initial carbonate volume (up to -86%) resulted from a
combination of decarbonation reactions and loss of CaO and CO(2). The
resulting volume change has potentially important consequences for the
interpretation of stable isotope profiles: the isotope alteration could
have occured over greater distances than those observed today.
enclosed within the granodiorite of the Qu,rigut massif (Pyrenees,
France). Mass balance calculations suggest a strong decrease of CaO, SrO
and CO(2) contents (up to -90%), correlated with a decrease of modal
calcite content as the contact is approached. Most other chemical
elements behave immobile during metasomatism. They are therefore
passively enriched. Only a small increase of SiO(2), Al(2)O(3) and
Fe(2)O(3) contents occurs in the immediate vicinity of the contact.
Hence, in this study, skarn formation is characterized by the lack of
large chemical element influx from the granitoid protolith. A large
decrease of the initial carbonate volume (up to -86%) resulted from a
combination of decarbonation reactions and loss of CaO and CO(2). The
resulting volume change has potentially important consequences for the
interpretation of stable isotope profiles: the isotope alteration could
have occured over greater distances than those observed today.
Open Access
Oui
Création de la notice
02/10/2012 19:47
Dernière modification de la notice
14/02/2022 8:56
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