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SISTEMA INTEGRAL DE INFORMACIÓN ACADÉMICA - PÚBLICO
Título del libro: Mineral Resources To Discover, Vols 1-4 Título del capítulo: New insights into the formation of multiples mineralization events in the San Dimas District, Mexico
The San Dimas district is a reference world-class silver-gold epithermal
low sulfidation deposit. We present a re-evaluation of this district
based on new U/Pb ages and field observation of mineralization styles.
We identify a Late Cretaceous volcanic succession of the Lower Volcanic
Complex correlative with the Tarahumara formation of southern of Sonora,
which hosts subvolcanic Au-rich felsic mineralized bodies comparable to
the Cu-Au porphyries of Sonora and Sinaloa. This succession is covered
by intermediate lavas with hypabyssal intrusions (productive andesite)
and is intruded by a Eocene batholith and several dike swarms. The final
magmatic activity consists of silicic ignimbrites and less basaltic lava
flows of Oligocene and early Miocene age.
The main epithermal mineralization consists of two kind of veins,
silver-gold and gold types, possibly related to different magmatic
sources. Our study shows that there is a genetic link between low
sulfidation silver-gold veins and felsic intrusion with porphyry
mineralization, which were recycled by the Eocene batholithic intrusion.
Entidades citadas de la UNAM:
Fuente:
ISBN: 9782981689801 Editorial: SOC GEOLOGY APPLIED MINERAL DEPOSITS-SGA