The role of folding in the development of the Mexican fold-and-thrust belt
Por:
Fitz-Díaz E., Tolson G., Hudleston P., Bolanos-Rodriguez, D, Ortega-Flores B., Serrano A.V.
Publicada:
1 ago 2012
Resumen:
The Mexican fold-and-thrust belt in central Mexico has overall characteristics that fit the critical tectonic wedge model. It is thin-skinned, forward propagating, tapers toward the toe (the east), and displays an overall decrease in deformation toward the toe. The internal structures and heterogeneity of deformation are not typical of fold-and-thrust belts, however, due to the presence of two large carbonate platforms, flanked by more thinly bedded basinal carbonates. Kilometer-scale thrusts dominate deformation in the platform carbonates (a more brittle behavior), and mesoscopic buckle folds and associated cleavage dominate deformation in the basinal carbonates (a more ductile behavior). Total shortening across the belt, including both platforms and basins, is similar to 55%-65%, with higher values in the basins than in the platforms and a concentration of deformation near the platform borders. The dominant mechanism of folding in the basinal rocks is buckling, with thin chert horizo
Filiaciones:
Univ Nacl Autonoma Mexico, Inst Geol, Dept Reg Geol, CU, Coyoacan, DF, Mexico
Department of Geology and Geophysics, University of Minnesota, 310 Pillsbury Drive SE, Minneapolis, MN 55454, United States
Facultad de Ingeniería, Benemérita Universidad Autónoma de Puebla, 4 sur 104 Centro Histórico, C.P. 72000, Puebla, Mexico
All Open Access, Bronze
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