Abstract

SOLE, Jesús; SALINAS, Juan Carlos; GONZALEZ-TORRES, Enrique  and  CENDEJAS CRUZ, José Eduardo. K/Ar ages of 54 igneous and metamorphic rocks from western, central and southern Mexico. Rev. mex. cienc. geol [online]. 2007, vol.24, n.1, pp.104-119. ISSN 2007-2902.

Fifty-four samples of igneous and metamorphic rocks from south, central and northern Mexico have been analyzed by the K/Ar method. Samples were provided to Instituto de Geología of Universidad Nacional Autónoma de México by the Consejo de Recursos Minerales (now Servicio Geológico Mexicano) from selected regions of the following states: Baja California Sur, Colima, Durango, Estado de México, Guerrero, Jalisco, Oaxaca, San Luis Potosí, Sinaloa y Zacatecas. All relevant information for each sample, including location, geological unit, petrographical description, mineral analyzed and age is described in the text; analytical data for each sample are given as a table. Ages range from 2 Ma to 249 Ma, with about 30% being Oligocene ages related to volcanism and plutonism in the Sierra Madre Occidental and Sierra Madre del Sur.

Keywords : K/Ar ages; igneous rocks; metamorphic rocks; Mexico.

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