Continental boundaries of the Jalisco block and their influence in the Pliocene-Quaternary kinematics of western Mexico
- Rosas-Elguera, J.
- Ferrari, L.
- Garduno-Monroy, V.H.
- Urrutia-Fucugauchi, J.
DOIAbstract
Extensional faulting observed in southwestern Mexico has been related to the incipient rifting of the Jalisco block from the Mexican mainland since the Pliocene. On the basis of new structural and geophysical data, we propose that (1) the continental boundaries of the Jalisco block are ancient structures reactivated since the Pliocene at a low (<1 mm/yr) rate of deformation, and (2) Pliocene-Quaternary extensional faulting at the edges of Jalisco block is a basement-controlled intraplate deformation related to plate boundary forces rather than to active continental rifting. The Jalisco block boundaries first developed in response to the uplift of the Puerto Vallarta batholith in pre-Neogene time and underwent a complex contractile deformati...
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