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COMMENT ON: "U–Pb geochronology of intrusive rocks of northwestern Mesa Central province and Sector Transversal of Sierra Madre Oriental, Mexico: Time and space distribution of inland Cretaceous-Paleogene magmatism during Mexican orogeny".

Authors :
Chávez-Cabello, Gabriel
Francisco Ramírez-Peña, César
Source :
Journal of South American Earth Sciences. Dec2023, Vol. 132, pN.PAG-N.PAG. 1p.
Publication Year :
2023

Abstract

In their paper: U–Pb geochronology of intrusive rocks of northwestern Mesa Central province and Sector Transversal of Sierra Madre Oriental, Mexico: Time and space distribution of inland Cretaceous-Paleogene magmatism during the Mexican orogeny, Díaz-Bravo et al. (2022) present a database of geochronological ages reported in literature and seven generated by themselves, with which they adapt a model of flat-slab subduction to explain the geographical distribution of the Cretaceous-Paleogene magmatism in north-central Mexico. In our opinion, the paper contains limited bibliographic documentation, since it omits previously published zircon U–Pb ages, whose relationship with the Mexican orogeny has been discussed in several previously published papers. Furthermore, an important approach on the distribution of plutons is that the effects of contractional deformation during pluton emplacement and younger extensional tectonics in the studied area were not evaluated. We propose that the syntectonic relationships with the Mexican Orogeny for some of the plutons imply that the magmas were emplaced in rocks undergoing shortening and eastward-NE translation during the development of the Mexican fold and thrust belt. Therefore, they are not in their original position and must be carefully studied to establish the magmatic model presented in this work. • The Cretaceous plutons in the Mesa Central and Sector Transversal of the Sierra Madre Oriental are syntectonic to the development of the Mexican Fold and Thrust Belt. • The Cretaceous syntectonic plutons are allochthonous, so they do not represent a fixed position to model the subduction angle of the Farallon plate. • Pico de Teyra and El Peñuelo plutons show evidence of mylonitic recrystallization, S-C structures, and cleavage, congruent with northeastward tectonic transport of the Mexican Fold and Thrust Belt. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
08959811
Volume :
132
Database :
Academic Search Index
Journal :
Journal of South American Earth Sciences
Publication Type :
Academic Journal
Accession number :
173856408
Full Text :
https://doi.org/10.1016/j.jsames.2023.104637