Principales características de la intensidad del campo geomagnético en México durante el Plio-Pleistoceno
Main features of the geomagnetic field strength in Mexico during the Plio-Pleistocene
Ulises Demian Díaz1,, Rafael García Ruiz2, Miguel Cervantes-Solano3,*, Avto Goguitchaichvili2, Hector López Loera4, José Rosas Elguera5, Jaime Urrutia Fucugauchi6, Juan Morales2
1 Posgrado en Ciencias de la Tierra, Unidad de Posgrado, UNAM, Ciudad Universitaria, C.P 04510, CDMX, México.
2 Laboratorio Interinstitucional de Magnetismo Natural, Instituto de Geofísica Unidad Michoacán, UNAM, Antigua Carretera a Pátzcuaro 8701, Ex Hacienda de San José de la Huerta, 58190 Morelia, Michoacán, México
3 Escuela Nacional de Estudios Superiores Unidad Morelia, UNAM, Antigua Carretera a Pátzcuaro 8701, Ex Hacienda de San José de la Huerta, 58190 Morelia, Michoacán, México
4 División de Geociencias Aplicadas, IPICYT, Camino a la Presa San José 2055, Col. Lomas 4 sección CP. 78216, San Luis Potosí, México
5 Centro Universitario de los Valles, Universidad de Guadalajara, Carr. a Guadalajara Supermanzana El Km. 45.5, 46708 Caimanero, Jalisco, México.
6 Laboratorio de Paleomagnetismo, Instituto de Geofísica, UNAM, Circuito de la investigación Científica s/n, Ciudad Universitaria, Delegación Coyoacán, C.P. 04510, CDMX, México.
Autor para correspondencia: (M. Cervantes-Solano) This email address is being protected from spambots. You need JavaScript enabled to view it.
Cómo citar este artículo:
Díaz, U.D., García Ruíz, R., Cervantes-Solano, M., Goguitchaichvili, A., López Loera, H., Rosas Elguera J., Urrutia Fucugauchi, J., Morales, J., 2024, Principales características de la intensidad del campo geomagnético en México durante el Plio-Pleistoceno: Boletín de la Sociedad Geológica Mexicana, 76 (3), A220424. http://dx.doi.org/10.18268/BSGM2024v76n3a220424
Manuscrito recibido: 8 de Diciembre de 2023; manuscrito corregido: 10 de Abril de 2024; manuscrito aceptado: 22 de Abril de 2024.
ABSTRACT
We report new absolute paleointensity determinations obtained from independent lava flows emplaced during the Pliocene and distributed along the TepicZacoalco Rift (Western Trans-Mexican Volcanic Belt). In addition, we carried out a compilation and analyses of previous paleointensity studies carried out in Mexico, covering age intervals of the last 5 million years. The average value of the virtual dipole moment obtained for the last million years (10 x 1022 Am2), is higher than that observed in other locations worldwide. On the other hand, for the period from 3 to 5 million years, the average value of the dipole moment is 6 x 1022 Am2, which apparently suggests a gradual increase in intensity at least at regional scale, during the last million years. A significant decrease in intensity was detected for a presumably transitional lava flow. These results agree with previous studies carried out in the surrounding areas, reporting a notably low paleointensity value associated with a rather unstable geomagnetic regime.
Keywords: Paleointensity, Tepic-Zacoalco Rift, Plio-Plesitocene.
