Is there a Grenvillian basement in the Guerrero-Morelos Platform of Mexico?
In the Guerrero-Morelos platform (Guerrero State, Mexico) the adakitic rocks of Early Tertiary age containabundant hornblende-rich tonalite xenoliths. Zircon crystals have been concentrated from both adakites andxenoliths, and dated using in-situ U-Pb ion microprobe analyses. These analyses indicate...
| Autores: | , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2007 |
| País: | México |
| Recursos: | Universidad Nacional Autónoma de México |
| Repositorio: | Redalyc-UNAM |
| OAI Identifier: | oai:redalyc.org:50550203 |
| Acesso em linha: | https://www.redalyc.org/articulo.oa?id=50550203 |
| Access Level: | acceso abierto |
| Palavra-chave: | Ciencias de la Tierra Zircon Guerrero Pb dating Grenvillian Age |
| Resumo: | In the Guerrero-Morelos platform (Guerrero State, Mexico) the adakitic rocks of Early Tertiary age containabundant hornblende-rich tonalite xenoliths. Zircon crystals have been concentrated from both adakites andxenoliths, and dated using in-situ U-Pb ion microprobe analyses. These analyses indicate the presence of inheritedGrenvillian and early Triassic/late Permian crust ages, as well as a Paleocene age related with the adakiterock intrusion. This range of inherited ages is reported for the first time in the Guerrero-Morelos platform, suggestingthat a continous Grenvillian crust exists between the Oaxacan complex,to the East, and the Guerrero-Morelos platform. |
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