Mapping a geothermal anomaly using apatite (U‐Th)/He thermochronology in the Têt fault damage zone, eastern Pyrenees, France

Abstract : (U‐Th)/He ages on apatite obtained in the vicinity of the Têt fault hydrothermal system show a large variability. In the inner damage zone adjacent to the fault core, where fluid flows are concentrated, AHe ages display a large scatter (3–41 Ma) and apatite ageing. Samples from the outer damage zone show young ages with less dispersion (0.9–21.1 Ma) and apatite rejuvenation. Outside the damage zone, ages are consistent with the regional exhumation history between 20 and 12 Ma. The important age dispersion found in the damage zone is interpreted as the result of 4He mobility during fluid infiltration. Our results show that thermochronological data close to a fault should be interpreted with caution, but may offer a new tool for geothermal exploration.
Liste complète des métadonnées

https://hal.umontpellier.fr/hal-02445186
Contributeur : Gm Aigle <>
Soumis le : lundi 20 janvier 2020 - 09:04:10
Dernière modification le : mardi 21 janvier 2020 - 01:55:52

Identifiants

Collections

Citation

Gaétan Milesi, Roger Soliva, Patrick Monie, Philippe Munch, Mathieu Bellanger, et al.. Mapping a geothermal anomaly using apatite (U‐Th)/He thermochronology in the Têt fault damage zone, eastern Pyrenees, France. Terra Nova, Wiley-Blackwell, 2019, 31 (6), pp.569-576. ⟨10.1111/ter.12429⟩. ⟨hal-02445186⟩

Partager

Métriques

Consultations de la notice

19