RT Journal Article
T1 Tectonics and volcanism of Sierra Chichinautzin: extension at the front of the Central Trans-Mexican Volcanic belt
A1 Márquez González, Álvaro
A1 Verma, Surendra P.
A1 Anguita Virella, Francisco
A1 Oyarzun Muñoz, Roberto
A1 Brandle, José L.
AB Because of its recent activity and position at the southern magmatic front of the Trans-Mexican Volcanic Belt (TMVB), the Sierra Chichinautzin volcanic field (SCN) is a key area for the understanding of this controversial volcanic province. Volcanic activity has built more than 220 monogenetic volcanoes (shields, scoria cones, thick lava flows, and hydromagmatic structures) during the last 40,000 years, for a total volume of about 470 km3. The SCN basalts are geochemically similar to OIBs, while the intermediate and felsic volcanic rocks show a calc-alkaline trend and abundant evidence for magma mixing. The structural analysis of this volcanic field and surrounding areas has been based on field data, satellite images, and a method for detecting volcanic center alignments. The tectonic data, together with geophysical evidence, confirm active general N–S extensional conditions with a strike–slip component for the SCN area, the same structural setting that prevails in the rest of the Central TMVB. Extensional tectonics, a negative regional Bouger gravity anomaly, a low-velocity mantle, high heat flow, and shallow seismicity suggest a rift-type setting involving the upwelling of anomalous mantle beneath the Central TMVB. The combined petrological, structural and geophysical arguments support that the SCN volcanism is rift-related, and rule out processes involving the subduction of the Cocos plate, which casts further doubts on the standard subduction model for the TMVB volcanism.
PB Elsevier
SN 0377-0273
YR 1999
FD 1999-11-15
LK https://hdl.handle.net/20.500.14352/118196
UL https://hdl.handle.net/20.500.14352/118196
LA eng
NO Márquez, A., Verma, S. P., Anguita, F., Oyarzun, R., & Brandle, J. L. (1999). Tectonics and volcanism of sierra chichinautzin: Extension at the front of the central trans-mexican volcanic belt. Journal of Volcanology and Geothermal Research, 93(1-2), 125-150. https://doi.org/10.1016/S0377-0273(99)00085-2
NO Consejo Nacional de Humanidades, Ciencias y Tecnologías (México)
NO Dirección General de Asuntos del Personal Académico de la UNAM (México)
DS Docta Complutense
RD 6 abr 2025