Skip to Main content Skip to Navigation
Journal articles

Geochronological and geochemical characterization of magmatic-hydrothermal events within the Southern Variscan external domain (Ce'vennes area, France)

Abstract : Geochronological, mineralogical, and geochemical analyses have been focussed on the Mont-Loze're- Borne plutonic complex and surrounding rocks (Ce'vennes, French Massif Central) in which B-W-Sn and As-Au-Sb mineralization is encountered. Two main results are highlighted: (1) the existence of a 301-306 Ma magmatohydrothermal event unrelated to the emplacement of the Pont-de-Montvert-Borne plutonic body at 316 Ma; (2) the magmatic and hydrothermal features are strongly associated, both in time and in space, thus demonstrating an intimate connection between mineralizing processes and magmatism in this part of the French Massif Central. We also show that mineralization and associated hydrothermal occurrences do not correspond to a simple and single geochemical signature and that a contamination model must be invoked in order to account for the complexity of isotopic results. This study demonstrates that the application of the O and H isotopic signatures as tracers of the source and nature of fluids in an orogenic context requires some specific care. Finally, a model of the tectonic-magmatic- hydrothermal evolution of the study area is suggested in which we discuss two alternative scenarios. The first one implies the existence of two different hydrothermal/ mineralizing events (Bo-W-Sn and As-Au-Sb ones). The second one suggests the same source for all hydrothermal and mineralized structures.
Complete list of metadatas

https://hal-insu.archives-ouvertes.fr/insu-00576546
Contributor : Nathalie Pothier <>
Submitted on : Monday, April 2, 2012 - 4:51:40 PM
Last modification on : Monday, June 15, 2020 - 3:52:16 PM
Long-term archiving on: : Tuesday, July 3, 2012 - 2:20:39 AM

File

Chauvet-InternationalJournalEa...
Publisher files allowed on an open archive

Identifiers

Citation

Alain Chauvet, Nathalie Volland-Tuduri, Catherine Lerouge, Vincent Bouchot, Patrick Monié, et al.. Geochronological and geochemical characterization of magmatic-hydrothermal events within the Southern Variscan external domain (Ce'vennes area, France). International Journal of Earth Sciences, Springer Verlag, 2012, 101 (1), pp.69-86. ⟨10.1007/s00531-011-0639-1⟩. ⟨insu-00576546⟩

Share

Metrics

Record views

967

Files downloads

881