Cordilleran Section - 108th Annual Meeting (29–31 March 2012)

Paper No. 1
Presentation Time: 08:40


FRANCO-RUBIO, Miguel1, CABALLERO-MIRANDA, Cecilia I.2, ALVA-VALDIVIA, Luis M.3, OVIEDO, Angelica1, URRUTIA-FUCUGAUCHI, Jaime4, MARTÍNEZ-REYES, Fernando1, TORRES-KNIGHT, Ricardo1, RIGGS, N.R.5, GONZÁLEZ-LEÓN, Carlos M.6 and LÓPEZ-SANTILLÁN, Roberto1, (1)Facultad de Ingenieria, Universidad Autonoma de Chihuahua, Nuevo Campus Universitario, Circuito Universitario No. 1, Campus II, Chihuahua, CP 31125, Mexico, (2)Laboratorio de Paleomagnetismo y Geofisica Nuclear, Instituto de Geofisica, UNAM, Ciudad Universitaria Del. Coyoacan, México, D.F, 04510, Mexico, (3)Laboratorio de Paleomagnetismo y Geofisica Nuclear, Instituto de Geofisica, UNAM, Ciudad Universitaria Del. Coyoacan, México D.F, 04510, Mexico, (4)Instituto de Geofísica, Universidad Nacional Autonoma de Mexico, Circuito exterior, Ciudad Universitaria Delegación Coyoacan, Distrito Federal, 04510, Mexico, (5)School of Earth Sciences and Environmental Sustainability, Northern Arizona University, Flagstaff, AZ 86011-4099, (6)Instituto de Geología, UNAM, Estación Regional del Noroeste, Apartado Postal 1039, Hermosillo, Sonora, 83000, Mexico,

The Ouachita system extends southwest from where it joins the Appalachian orogeny near the Black Warrior Basin in Alabama, westward through Mississippi, Arkansas, and southwest Oklahoma, and continues through the Llano Uplift and Big Bend regions of Texas. In Mexico outcrops attributable to the Ouachita are found in Coahuila, Chihuahua, and Sonora.

The Ouachita orogeny, since the Silurian, evolved first as a result of the approach of Gondwana to Laurentia as the Rheic oceanic plate was subducted beneath both continental plates, followed by volcanic arc emplacement in Mississippian time, and finally the collision of the continental plates in the Pennsylvanian. Thus, a tectonic evolution trend from east to west is apparent. As a consequence, igneous volcanic and intrusive rocks of presumed Permian age were emplaced on and within turbidity-sequence rocks that crop out in the Benavides, Chorreras, Carrizalillo, Plomosas, Placer de Guadalupe, Aldama, Magistral, Moris and El Pilar regions of Chihuahua.

According to Arvizu et al. (2009), the Permian-Triassic magmatic arc, which extends from California-Nevada to central and southern Mexico, is the result of eastward subduction during the Ouachita orogeny from late Carboniferous to early Permian times. The Gondwana plate approached Laurentia plate from Silurian to Permian times, and the intervening Rheic oceanic plate experienced type-B subduction under one or both continental plates.

  • MFR_Permian magmatic arc-GSA.pdf (6.6 MB)