Northward laramide thrusting in the quitovac region, northwestern sonora, mexico: Implications for the juxtaposition of paleoproterozoic basement blocks and the mojave-sonora megashear hypothesis

Iriondo, A.; Martinez-Torres, L. M.; Kunk, M. J.; Atkinson, Jr. , W. W.; Premo, W. R.; McIntosh, W. C.

Abstract:

Restoration of 12%-30% Basin and Range extension allows direct interpretation of ductile fabrics associated with a stack of Laramide thrust faults in the Quito- vac region in northwestern Sonora. The inferred direction of displacement of these thrusts varies gradually from N63??W to N23??E and is interpreted to represent a clockwise rotation of the direction of Laramide thrusting through time. The thrust faults represent a piggy-back sequence of thrusting propagating north, toward the foreland. The average direction and sense of displacement of the thrusts is N18??W, and the cumulative 45 km of estimated northward-directed displacement corresponds to ???86% of shortening. ?? 2005 Geological Society of America.

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Article

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70035336

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Iriondo, A.; Martinez-Torres, L. M.; Kunk, M. J.; Atkinson, Jr. , W. W.; Premo, W. R.; McIntosh, W. C.

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669

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393

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English

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Special Paper of the Geological Society of America

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Northward laramide thrusting in the quitovac region, northwestern sonora, mexico: Implications for the juxtaposition of paleoproterozoic basement blocks and the mojave-sonora megashear hypothesis; 2005; Article; Journal; Special Paper of the Geological Society of America; Iriondo, A.; Martinez-Torres, L. M.; Kunk, M. J.; Atkinson, Jr. , W. W.; Premo, W. R.; McIntosh, W. C.