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Título del libro: 17th Biennial Sga Meeting, 2023, Vol 1
Título del capítulo: Las Minas newly recognized epithermal deposit and its relationship with Tatatila-Las Minas Skarn, Veracruz, Mexico

Autores UNAM:
JUAN CARLOS MORA CHAPARRO; JULIE ROBERGE;
Autores externos:

Idioma:

Año de publicación:
2023
Resumen:

The Las Minas district, Veracruz, hosts the well-known Tatatila-Las Minas IOCG skarn deposits. Until now, the possibilities of other types of deposits in the area have been ignored because of the presence of this skarn, which has reported reserves of 719,000 oz Au eq. This work aims to show the existence of another type of mineral deposit overprinting the mineralized zone of the Tatatila-Las Minas skarn deposit. Regional geology shows a vast extension of dolomites and limestones of the Tamaulipas inferior formation which were intruded during the Miocene by three thermal events of granitic to granodioritic composition. As a result of the intrusions, a contact metamorphism zone was developed and led to the precipitation of skarn minerals rich in Cu-Fe-Au-Ag. Based on petrographic and mineralogical studies of skarn samples, evidence for hydrothermal fluid circulation and epithermal veins has been observed, suggesting the presence of an epithermal deposit overprinting large exposures of the skarn. Linking the geological history of both deposits will help to understand if both mineralization events were cogenetic or originated from different geological events.


Entidades citadas de la UNAM: