Geology of Las Minas: an example of an exhumed geothermal system (Eastern Trans-Mexican Volcanic Belt)

Emmanuel Olvera-García, Caterina Bianco, Garduño-Monroy Víctor Hugo, Andrea Brogi, Domenico Liotta, Walter Wheeler, Fidel Gómez-Alvarez, Sergio Najera-Blas, Adrián Jiménez-Haro, Jorge Alejandro Guevara-Alday, Eivind Bastesen, Baptiste Lepillier, Martina Zucchi, Alfredo Caggianelli and Giovanni Ruggieri

Journal of Maps, 2020, vol. 16, issue 2, 918-926

Abstract: The Las Minas area corresponds to an exhumed geothermal system considered a proxy for the deep part of the nearby Los Humeros active geothermal system. The stratigraphic succession is made up of: Palaeozoic-Miocene granitoids, a thick Jurassic- Cretaceous carbonate succession, Neogene lava flows and volcano-sedimentary deposits. Linked to a Miocene magma intrusion, marble and skarn rock-volumes developed by contact metamorphism and geothermal fluid flow. Faults are arranged in SW- and NNW-striking systems. These controlled the morphological evolution and favored Neogene-Quaternary dyke emplacement. Faulting gave rise to a tectonic depression where lacustrine sediments and pyroclastics deposited. Skarn rocks are mainly located at fault intersections and along pre-existing discontinuities, suggesting the role of bedding and/or fractures in channeling deep fluids. Results give inputs for exploration at depth of Los Humeros geothermal system.

Date: 2020
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DOI: 10.1080/17445647.2020.1842815

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