Application of geophysical and hydrogeochemical methods in the Zimapán Aquifer, Hidalgo for environmental purposes

Main Article Content

Tania Karen Espinoza Juárez
José Iván Morales-Arredondo
María Aurora Armienta Hernández
Ana Luz Caccavari Garza
Gerardo Cifuentes Nava
Daniel Armando Pérez-Calderón
Evelyn Abigail Mosso-Mendoza

Abstract

The region of Zimapán, Hidalgo, situated within the Tolimán watershed, faces groundwater contamination issues due to high concentrations of arsenic (As) and, in certain sites, fluoride (F-). This pollution is associated with the presence of several mineral deposits enriched with metallic sulfides, such as pyrite and arsenopyrite, as well as other minerals such as scorodite, a mineral produced by an exothermic process that releases sulfate. The origin of this mineralization stems from two distinct mineralization events: the initial event, linked with intrusions, and the subsequent event, characterized as hydrothermal in nature. These post-tectonic events, together with the Laramide orogeny, have generated an abrupt geomorphology and deformation, mainly in the carbonate sequence, which is covered by volcanic sediments. This makes it difficult to characterize geological structures that are continuous at depth and that may influence the aquifer system and the contamination of the basin. This study aims to identify and analyze the geological formations potentially associated with the occurrence of arsenic in groundwater at specific locations that influence groundwater dynamics, as well as structural formations that act as sources and pathways for the transport of these solutes. In pursuit of this objective, various methods were employed to regionally characterize and infer subsurface structures. Magnetic anomaly and Bouguer anomaly data were utilized. Utilizing this information, indirect 3D three-dimensional models of the study area were constructed, which were linked to the geological formations prevalent in the area through a thorough analysis of gravimetric and aeromagnetic anomalies. Among the most relevant results obtained, we observed the presence of highly dense bodies associated with granitic intrusions. Additionally, certain lineaments were identified that align with NW-SE geological faults validated in previous works with other methodologies, which link the mineralization resulting from the granitic intrusions and enrich groundwater with highly toxic metals and metalloids, mainly with arsenic. Finally, hydrogeochemistry proved to be useful in evaluating the influence relationship between the main anomalous bodies and natural groundwater contamination.

Article Details

How to Cite
Espinoza Juárez, T. K., Morales-Arredondo, J. I., Armienta Hernández, M. A., Caccavari Garza, A. L., Cifuentes Nava, G., Pérez-Calderón , D. A., & Mosso-Mendoza, E. A. (2026). Application of geophysical and hydrogeochemical methods in the Zimapán Aquifer, Hidalgo for environmental purposes. Geofisica Internacional, 65(2), 2071–2088. https://doi.org/10.22201/igeof.2954436xe.2026.65.2.1916
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Article
Author Biographies

José Iván Morales-Arredondo, Universidad Nacional Autónoma de México, Instituto de Geofísica, Departamento de Recursos Naturales, Coyoacán, 04150, CDMX

Senior Research Fellow at the Department of Natural Resources of the Institute of Geophysics at UNAM. His career focuses on the study of aquifers in central and northern Mexico that contain high arsenic and fluoride contents.

María Aurora Armienta Hernández, Universidad Nacional Autónoma de México, Instituto de Geofísica, Departamento de Recursos Naturales, Coyoacán, 04150, CDMX

Senior Research Fellow at the Institute of Geophysics of the National Autonomous University of Mexico (UNAM).
She is a member of the National System of Researchers at Level III and Level D of the UNAM PRIDE (National Institute of Advanced Studies). She founded the Analytical Chemistry Laboratory and has been responsible for its continuous updating and improvement. Her research interests include hydrogeochemistry, environmental geochemistry, analytical geochemistry, and geochemical processes associated with active volcanism. Her scientific work includes 145 articles published in international peer-reviewed journals, 38 book chapters, 3 edited books, 43 refereed articles in proceedings, 42 non-refereed articles in proceedings, and 20 popular publications. She is a professor in the Graduate Program in Earth Sciences.

Ana Luz Caccavari Garza, Universidad Nacional Autónoma de México, Instituto de Geofísica, Servicio Magnético, Coyoacán, 04150, CDMX

Full Academic Technician A at the Institute of Geophysics of the UNAM. She currently works at the Magnetic Service studying the behavior of the Earth's magnetic field.

Gerardo Cifuentes Nava, Universidad Nacional Autónoma de México, Instituto de Geofísica, Servicio Magnético, Coyoacán, 04150, CDMX

Full-time academic technician from the UNAM Institute of Geophysics. Member of the Magnetic Service, with extensive experience in monitoring and analyzing the geomagnetic field, and geophysical instrumentation applied to various areas.

Daniel Armando Pérez-Calderón , Universidad Nacional Autónoma de México, Instituto de Geofísica, Departamento de Geomagnetismo y Exploración, Coyoacán, 04150, CDMX

Academic Technician A from the Institute of Geophysics of the UNAM. His research focuses on marine geophysics and marine exploration.

Evelyn Abigail Mosso-Mendoza, Universidad Nacional Autónoma de México, Escuela Nacional en Ciencias de la Tierra, Coyoacán, 04150, CDMX

Bachelor's student at the National School of Earth Sciences of the UNAM

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