Journal article

Neogene structural evolution of the Sierra San Felipe, Baja California: Evidence for proto-gulf transtension in the Gulf Extensional Province?

Christian Seiler, John M Fletcher, Mark C Quigley, Andrew JW Gleadow, Barry P Kohn



The Sierra San Felipe, located in the Gulf Extensional Province of northeastern Baja California, experienced a complex deformation history of integrated normal and strike-slip faulting, block rotations and extension-parallel folding as a result of Neogene transtensional plate margin shear between the Pacific and North American plates. The eastern range-front of the Sierra San Felipe is defined by three left-stepping, en-echelon detachment faults that are linked by dextral and sinistral transfer faults and accommodation zones. The Las Cuevitas, Santa Rosa and Huatamote detachments comprise NE- to SE-dipping, moderate- to low-angle normal faults that accommodate between ~. 1.5 and 9. km of bro..

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Awarded by ARC

Awarded by CONACYT

Awarded by NSF

Funding Acknowledgements

This research was partially funded by ARC DP0665127 to AJWG and BPK, and by grants CONACYT #81463 grants to and NSF EAR-0739017 Sub-Award 08-004375-01 JMF. Additional support was provided to CS by MIFRS. MIRS and MATS scholarships from the University of Melbourne and the David Hay Memorial Fund. The author is especially grateful to Yvonne Kunz for invaluable support and assistance in the field. Ramon Mendoza-Borunda, Arturo Martin-Barajas and the staff at CICESE are thanked for their help and logistical support. Chris Wilson provided the software used for fault-slip analysis. David Foster and Jon Spencer made valuable comments on an early version of this manuscript. We thank two anonymous reviewers for thoughtful and constructive reviews which greatly helped to improve the quality of the manuscript, and Ibrahim Cemen for the editorial handling of the manuscript.