Regional tectonics of western Mexico and its implications for the northern boundary of the Jalisco Block
Por:
Ferrari L., Pasquare G., Venegas S., Castillo D., Romero F.
Publicada:
1 ene 1994
Resumen:
The Tepic-Zacoalco rift of western Mexico had been considered the result of right-lateral and normal faulting of Plio-Quaternary age produced along the northern boundary of the Jalisco Block by its rifting away from the North America plate. Geologic and structural field studies in the States of Nayarit and Jalisco revealed that the boundary is wider than previously reported and that since late Miocene no major strike-slip deformation has been occurring along it. The results of this study together with seismological and plate motion studies raise doubts about the models which hypothesise a Plio-Quaternary active rifting of the Jalisco Block. It is suggested instead that the late Pliocene to Quaternary extensional tectonics along the Jalisco Block boundaries could be a passive feature induced by the differential motion of the Rivera plate with respect to the adjacent Cocos and Pacific plates. -from Authors
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