- Open Access
Paleomagnetism of the latest Cretaceous-Paleocene intrusive suite of the Mezcala district, southern Mexico
Earth, Planets and Space volume 58, pages1315–1322(2006)
Paleomagnetic data from three plutons of the latest Cretaceous to early Tertiary Mezcala intrusive suite, of the Mezcala mining district in northern Guerrero State, in southern Mexico, are characterized by well-defined near univectorial magnetizations of both normal and reverse polarities. The magnetizations reside primarily in a ferromagnetic cubic phase (magnetite or maghemite) and partly in hematite. Within-site dispersion is relatively small, but between-site dispersion is not. The overall mean for 9 selected sites is of D=318.5° and I=47.1° (k=18.5; α95=12.3°), and is discordant with respect to the reference direction for North America. The discordance may be explained by tilt down-to-the-northeast of the structural block that contains the intrusive suite of about 40° about a NW-SE trending axis, or perhaps more likely and based on additional geological evidence, by a combination of ∼20° of counterclockwise rotation about a vertical axis and a smaller amount of tilt. Vertical-axis-rotation is supported by paleomagnetic data from nearby localities, whereas a small magnitude of tilt is supported by geological field relations. This result is consistent with the hypothesis that Laramide structures of the Guerrero-Morelos platform were reactivated by a younger deformation event, and that there is a deformation event superimposed that involves lateral slip. The contrasting orientation of NW-SE trending structures within the Mezcala mining district affecting the plutons, and N-S trending Laramide structures, suggests that the discordant paleomagnetic directions are best explained by a combination of tilt and rotation.
Butler, R. F., Paleomagnetism: Magnetic Domains to Geologic Terranes, Blackwell Scientific Publications, Cambridge, Massachusetts, 319 pp., 1992.
Cerca-Martínez, M., Deformación y magmatismo Cretácico Tardío—Terciario Temprano en la zona de la Plataforma Guerrero Morelos, Ph.D. Thesis, Universidad Nacional Autónoma de México, México, D.F., 175 p, 2004.
Cerca-Martínez, M., L. Ferrari, M. Bonini, G. Corti, and P. Manetti, The role of crustal heterogeneity in controlling vertical coupling during the Laramide shortening and the development of the Caribbean-North American transform in southern Mexico: insights from analogue models, in Vertical coupling and decoupling in the lithosphere, edited by J. Grocott, G. Taylor, and B. Tikoff, Geological Society London, Special Publication, 227, pp. 117–140, 2004.
De Cserna, Z., F. Ortrega-Gutiérrez, and M. Palacios-Nieto, Reconocimiento geológico de la parte central de la cuenca del Alto Río Balsas, Estados de Guerrero y Puebla, Libro Guía, Excursión Geológica III, Reunión Nacional de Geotectónica y Geotermia, México, 40 pp, 1980.
De la Garza, V., R. Téllez, R. Díaz, and A. Hernández, Geology of the Bermejal iron-gold deposit, Mezcala, Guerrero, México, in: Coyner, A. R. and Fahey P. L. (editors), Geology and ore deposits of the American Cordillera, Geological Society of Nevada, Symposium Procedings, Reno, Nevada, 111, pp. 1354–1368, 1996.
González-Partida, E., D. M. Jones, A. Cheilletz, D. Gasquet, and G. Levresse, Paleocene Adakite Bearing Au-Fe Intrusive Rocks, Mezcala México: Evidence from Geochemical Characteristics, Journal of Geochemical Exploration, 26–40, 2003.
Hagstrum, J. T. and D. A. Sawyer, Late Cretaceous paleomagnetism and clockwise rotation of the Silver Bell Mountains, south central Arizona, Journal of Geophysical Research, 94, 17,847–17,860, 1989.
Hernández-Romano, U., N. Aguilera-Franco, M. Martínez-Medrano, and J. Barcel-Duarte, Guerrero-Morelos plataform drowning at the Cenomanian-Turonian boundary, Hutiziltepec area, Guerrero state, southern México, Cretaceous Research, 18, 661–686, 1997.
Jones, D. M. and P. R. Jackson, Geologic setting of skarn associated gold deposits of the Nukay district, Guerrero, Mexico, Asociación Mexicana de Ingenieros de Minas, Metalurgistas y Géologos de México, XXIII Annual Meeting Proceedings, Acapulco, México–46, 42.
Kirschvink, J. L., The least-squares line and plane and the analysis of paleomagnetic data: examples from Siberia and Morroco, Geophys. J. Roy. astron. Soc., 62, 699–718, 1980.
Levresse, G, E. Gonzalez-Partida, A. Cheilletz, D. Gasquet, E. Deloule, A. Carillo-Chavez, J. Tritlla, and A. Camprubi, Petrology, U/Pb dating and (C-O) stable isotope constraints on the source and evolution of the adakite-related Mezcala Fe-Au skarn district, Guerrero, Mexico, Mineralium Deposita 39, 301–312, 2004.
McElhinny, M. W. and J. Lock, IAGA global palaeomagnetic database, Geophysical Journal International, 101, 763–766, 1990.
Meschede, M. and W. Frisch, A plate tectonic model for the Mesozoic and early Cenozoic history of the Caribbean plate, Tectonophysics, 296, 269–291, 1988.
Melker, M. D. and J. W. Geissman, Paleomagnetism of the Oquirrh Mountains and implications for the Cenozoic structural history of the easternmost Great Basin, in Geology and Ore Deposits of the Oquirrh and Wasatch Mountains, Utah, Guidebook Series—Society of Economic Geologists, 29, 101–112, 1997.
Molina Garza and Ortega Rivera, Lithostratigraphy, paleomagnetism, and magnetostratigraphy of the Balsas Formation, northern Guerrero state, Mexico, Revista Mexicana de Ciencias Geológicas, 23, 215–232, 2006.
Molina Garza, R. S., H. N. Bohnel, and T. Hernández, Paleomagnetism of the Cretaceous Morelos Formations southern Mexico, Tectonophysics, 361, 301–317, 2003.
Morán-Zenteno, D. J., G. Tolson, R. G. Martínez-Serrano, B. Martiny, P. Schaaf, G. Silva-Romo, L. Alva-Aldave, M. S. Hernández-Bernal, and G. N. Solís-Pichardo, Tertiary arc magmatism of the Sierra Madre del Sur, Mexico, and its transition to the volcanic activity of the Trans-Mexican Volcanic Belt, Journal of South American Earth Sciences, 12, 513–535, 1999.
Ortega-Gutiérrez, F, Rocas volcánicas del Maestrichtiano en el área de San Juan Tetelcingo, Estado de Guerrero, in Sociedad Geológica Mexicana, Libro Guía de la Excursión Geologica a la Parte Central de la Cuenca del Alto Río Balsas, V Convención Geológica Nacional, p. 34–38,1980.
Urrutia-Fucugauchi, J., Preliminary paleomagnetic study of Lower Tertiary volcanic rocks from Morelos and Guerrero states, Geofísica Internacional, 22, 87–110, 1983.
Urrutia-Fucugauchi, J. and R. S. Molina Garza, Magnetic fabrics and rock magnetism of the Xaltianguis intrusive, southern Mexico: implications for emplacement mode, Geofísica Internacional, 34, 201–211, 1995.
Zijderveld, J. D. A., A.C. demagnetization of rocks: Analysis of results, in Methods in Rock Magnetism and Paleomagnetism, edited by D. W. Collinson, K. M. Creer, and S. K. Runcorn, pp. 254–286, Elsevier, Amsterdam, 1967.
About this article
Cite this article
Molina Garza, R.S., Valdivia, L.A. Paleomagnetism of the latest Cretaceous-Paleocene intrusive suite of the Mezcala district, southern Mexico. Earth Planet Sp 58, 1315–1322 (2006). https://doi.org/10.1186/BF03352627