Publication: El volcanismo monogenético del campo volcánico de Michoacán-Guanajue¡ato (México): petrogénesis e implicaciones geodinámicas
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2017-12-12
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Universidad Complutense de Madrid
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Abstract
El presente trabajo de investigación aborda la petrogénesis del volcanismo monogenético Plio-Cuaternario a Holoceno del Campo Volcánico de Michoacán- Guanajuato (CVMG) en México, uno de los mayores campos volcánicos del Cinturón Volcánico Mexicano (CVM). En dicho campo volcánico coexiste una asociación de magmas alcalinos y calcoalcalinos no estudiado en detalle hasta la fecha. El magmatismo alcalino y subalcalino tradicionalmente se atribuyen a distintos ambientes geodinámicos (volcanismo de intraplaca vs volcanismo relacionado con subducción) por lo que su coexistencia sigue siendo objeto de debate tanto a nivel general como en el CVM. El objetivo principal de este proyecto ha sido por tanto caracterizar de forma precisa la petrogénesis de dicho volcanismo, en especial por lo que respecta a la asociación de magmatismo alcalino y calcoalcalino presente en el sector norte, y su relación con el volcanismo casi exclusivamente calcoalcalino que predomina en el resto del CVMG. La información petrogenética y su integración con observaciones geológicas y tectónicas, permite a su vez obtener inferencias esenciales acerca del ambiente geodinámico en el que se pudieron generar los distintos tipos petrológicos y así establecer un modelo tectonomagmático general que permita explicar su origen y distribución...
The present study focuses on the petrogenesis of Plio-Quaternary to Holocene monogenic volcanism of the Michoacán-Guanajuato Volcanic Field (MGVF) in Mexico, one of the largest volcanic fields of the Trans Mexican Volcanic Belt (TMVB). In this volcanic field, an association of alkaline and calcalkaline magmas coexists in its northern sector that has not yet been fully studied. Alkaline and subalkaline magmatism are traditionally attributed to different geodynamic environments (intraplate volcanism vs. volcanism related to subduction) and their coexistence is still a matter of debate both in a general sense and in the context of the TMVB. The main goal of this project was to accurately characterise the petrogenesis of the MGVF monogenetic volcanism, especially in regard to the alkaline - calcalkaline magmatic association present in the northern sector, and its relationship with the calcalkaline volcanism that predominates in the rest of the volcanic field. The obtained petrogenetic information and its integration with geological and tectonic observations has in turn allowed essential inferences to be made about the geodynamic environment in which the different petrologic types could have been generated and thus establishing a general tectono-magmatic model to explain its origin...
The present study focuses on the petrogenesis of Plio-Quaternary to Holocene monogenic volcanism of the Michoacán-Guanajuato Volcanic Field (MGVF) in Mexico, one of the largest volcanic fields of the Trans Mexican Volcanic Belt (TMVB). In this volcanic field, an association of alkaline and calcalkaline magmas coexists in its northern sector that has not yet been fully studied. Alkaline and subalkaline magmatism are traditionally attributed to different geodynamic environments (intraplate volcanism vs. volcanism related to subduction) and their coexistence is still a matter of debate both in a general sense and in the context of the TMVB. The main goal of this project was to accurately characterise the petrogenesis of the MGVF monogenetic volcanism, especially in regard to the alkaline - calcalkaline magmatic association present in the northern sector, and its relationship with the calcalkaline volcanism that predominates in the rest of the volcanic field. The obtained petrogenetic information and its integration with geological and tectonic observations has in turn allowed essential inferences to be made about the geodynamic environment in which the different petrologic types could have been generated and thus establishing a general tectono-magmatic model to explain its origin...
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Tesis inédita de la Universidad Complutense de Madrid, Facultad de Ciencias Geológicas, leída el 27-06-2017