REVISTAArzate et al.MEXICANA DE CIENCIAS GEOLÓGICAS v. 35, núm. 3, 2018, p. 228-239 Crustal structure of the eastern Acambay graben, Central Mexico, from integrated geophysical data Jorge Arzate1, Pierre Lacan1,*, Fernando Corbo-Camargo1,2, Claudia Arango-Galván3, Rafael Felix-Maldonado3,4, Jesús Pacheco5, and Rodrigo León-Loya4 1 Centro de Geociencias, Universidad Nacional Autónoma de México, Campus Juriquilla, Blvd. Juriquilla 3001, 76230 Querétaro, Mexico. 2 CONACyT - Centro de Geociencias, Universidad Nacional Autónoma de México, Campus Juriquilla, Blvd. Juriquilla 3001, 76230 Querétaro, Mexico. 3 Instituto de Geofísica, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 Ciudad de México, Mexico. 4 Posgrado Ciencias de la Tierra, Centro de Geociencias, Universidad Nacional Autónoma de México, Campus Juriquilla, 76230 Querétaro, Mexico. 5 Universidad Autónoma de Aguascalientes, Centro de Ciencias del Diseño y de la Construcción, Aguascalientes, Ags., Mexico. *
[email protected] ABSTRACT of 400 nT while the amplitude across the Acambay-Tixmadejé fault is insignificant. The geophysical model shows that both the Acambay- The Acambay graben is a ∼70 km long E–W seismically Tixmadejé and Pastores faults have constant and opposite dipping active structure located within the Trans-Mexican Volcanic Belt angles of about 70°, defining a nearly symmetric graben structure. (TMVB). Quaternary volcanism has contributed to shaping the According to our results, the Acambay-Tixmadejé fault as well as graben morphology and reported hydrothermal activity suggests the central graben fault system converge at a depth of ∼18 km that is the existence of potential geothermal reservoirs. Our work aims at consistent with the depth of the seismogenic crustal layer.