Thermochronology and exhumation rates of granitic intrusions at Mesa Central, Mexico
| Autor: | Gilles Levresse, Susana A. Alaniz-Álvarez, Shunshan Xu, Fanis Abdullin, Alexis del Pilar-Martínez, María de Jesús Paulina Olmos-Moya, Ángel F. Nieto-Samaniego |
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| Rok vydání: | 2020 |
| Předmět: |
geography
Plateau geography.geographical_feature_category Outcrop 020209 energy Geology 02 engineering and technology 010502 geochemistry & geophysics 01 natural sciences Mesa Thermochronology Paleontology 0202 electrical engineering electronic engineering information engineering computer Sea level 0105 earth and related environmental sciences computer.programming_language |
| DOI: | 10.6084/m9.figshare.8020760.v2 |
| Popis: | The Mesa Central of Mexico (MC) is an elevated plateau located 2000 m above sea level in central Mexico, where intrusions outcrop that register the history of exhumation-erosion occurring during the Late Cretaceous-Paleogene. The tectonic history of the region records formation of the Late Cretaceous-Paleogene ‘Mexican orogen’; this was followed by extension of the entire region and several plutons were then exhumed. The age and magnitude of the crustal uplift and erosion occurring during exhumation has not been addressed to date. Therefore, this study reports the crystallization and cooling ages of two plutons, the Tesorera Granodiorite and the Comanja Granite, and estimates their emplacement depths. Based on these data, the exhumation age of the Tesorera Granodiorite is estimated to be between ~73 Ma and ~63 Ma at an exhumation rate of ~528 m/m. y. and that of the Comanja Granite is 52 Ma and 48 Ma at an exhumation rate of ~2500 m/m. y. Exhumation-erosion event of the Tesorera Granodiorite was located on the trace of the San Luis-Tepehuanes Fault System and that of the Comanja Granite on the a trace of the El Bajío Fault System. Furthermore, the high exhumation rate in the Comanja Granite suggests that gravitational collapse played an important role during exhumation. |
| Databáze: | OpenAIRE |
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