Les syénites du castillet (massif de l'agly, pyrénées orientales, France): une roche exceptionnelle dans les pyrénées
Identifieur interne : 009302 ( Main/Exploration ); précédent : 009301; suivant : 009303Les syénites du castillet (massif de l'agly, pyrénées orientales, France): une roche exceptionnelle dans les pyrénées
Auteurs : Michel Demange [France] ; Florence Lia-Aragnouet [France] ; Marcel Pouliguen [France] ; Xavier Perrot [France] ; Hubert Sauvage [France]Source :
- Comptes Rendus de l'Academie des Sciences Series IIA Earth and Planetary Science [ 1251-8050 ] ; 1999.
Descripteurs français
- Wicri :
- geographic : France.
English descriptors
- KwdEn :
Abstract
Abstract: Le Castillet syenites (Agly massif) are unusual rocks in the eastern Pyrenees made up of more than 95 % of potash feldspar and albite. These rocks are hosted in the Variscan Saint-Arnac granite and form small domes, the shape of which suggests an emplacement by magmatic stopping. Syenites and their closest host rocks suffered various hydrothermal alterations, the most obvious being transformation of biotite into muscovite + rutile. Discussion of the origin of these syenites is difficult because of those alterations: many magmatic features are well preserved but metasomatic transformation may have very much modified the primary rocks.
Url:
DOI: 10.1016/S1251-8050(00)88582-1
Affiliations:
- France
- Languedoc-Roussillon, Occitanie (région administrative), Région Bretagne
- Huelgoat, Salvezines
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