Is there a Grenvillian basement in the Guerrero-Morelos Platform of Mexico?

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Gilles Pierre René Levresse
Jordi Tritlla i Cambra
Etienne Deloule
Porfirio Julio Pinto Linares
In the Guerrero-Morelos platform (Guerrero State, Mexico) the adakitic rocks of Early Tertiary age contain abundant hornblende-rich tonalite xenoliths. Zircon crystals have been concentrated from both adakites and xenoliths, and dated using in-situ U-Pb ion microprobe analyses. These analyses indicate the presence of inherited Grenvillian and early Triassic/late Permian crust ages, as well as a Paleocene age related with the adakite rock intrusion. This range of inherited ages is reported for the first time in the Guerrero-Morelos platform, suggesting that a continous Grenvillian crust exists between the Oaxacan complex,to the East, and the Guerrero-Morelos platform.

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Levresse, Gilles Pierre René et al. «Is there a Grenvillian basement in the Guerrero-Morelos Platform of Mexico?». Geologica Acta, 2007, vol.VOL 5, núm. 2, p. 167, https://raco.cat/index.php/GeologicaActa/article/view/82427.
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