Journal article
Neogene evolution of the eastern margin of Gulf of California, Sonora, Mexico: Insights from low-temperature thermochronology
R Lugo-Zazueta, B Kohn, A Gleadow, T Calmus, E Ramos-Velazquez, JM Fletcher, E Perez-Segura
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES | PERGAMON-ELSEVIER SCIENCE LTD | Published : 2020
Abstract
The rifted margin of Sonora in Mexico experienced the early stages of Neogene extension related to Gulf of California opening, when the Baja California peninsula was originally part of the North America plate. The early evolution considers that during the late Miocene the plate motion was accommodated in an initial stage known as the “proto-Gulf”. Then, Pacific plate motion relative to the North America plate migrated progressively westwards with a transtensional deformation accommodated by a series of transform faults and pull-apart basins forming the present Gulf of California. New apatite fission track and apatite and zircon (U–Th)/He analyses were performed on granitoid outcrops from coa..
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Awarded by Australian Research Council
Awarded by research project UNAM-PAPIIT
Funding Acknowledgements
This work was supported jointly by CONACYT and International Research and Fee Remission Scholarships from the University of Melbourne, as well as by funding from the Australian Research Council under grants A10020308 and DP1092861. Neutron irradiations were supported by a grant from the Australian Institute for Nuclear Science and Engineering. In Mexico, the work was partially supported by funding from research project UNAM-PAPIIT (IN104108) "La evolucion termo-estructural terciaria del batolito de Hermosillo, Sonora: Basin and Range vs Golfo de California". We thank Ernesto Molina Villalobos for his help during fieldwork, and the Seri people for allowing access to Isla Tiburon and Elizard Gonzalez for sampling campaign support. Thanks to Pablo Pefiaflor Escarcega and Adriana Aime Orci Romero from Estacion Regional del Noroeste, Instituto de Geologfa-UNAM for samples and thin sections preparation and to Asaf Raza, Abaz Alimanovie, Ling Chung and Alan Greig for lab assistance with the acquisition of thermochronology data. We thank Stuart Thomson for his constructive comments on this work.