Sr-Nd-Pb isotope and trace element geochemistry of calc-alkaline andesites from Volcán Colima, Mexico
We report Sr, Nd and Pb isotopic compositions and trace clement data on calc-alkaline andesites from Volcan Colima and compare them with other volcanic centers of the Mexican Volcanic Belt. The chondritc-normalizcd REE patterns of Colima andesites show LREE-cnriehment with negligible Eu anomalies. M...
| Autores: | , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 1993 |
| País: | México |
| Recursos: | UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO |
| Repositorio: | Geofísica Internacional |
| Idioma: | español |
| OAI Identifier: | oai:revistagi.geofisica.unam.mx:article/1404 |
| Acesso em linha: | http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/1404 |
| Access Level: | acceso abierto |
| Palavra-chave: | Colima Cinturón Volcánico Mexicano Calco-alcalino, México Mexican Volcanic Belt Calco-alkaline Mexico |
| Resumo: | We report Sr, Nd and Pb isotopic compositions and trace clement data on calc-alkaline andesites from Volcan Colima and compare them with other volcanic centers of the Mexican Volcanic Belt. The chondritc-normalizcd REE patterns of Colima andesites show LREE-cnriehment with negligible Eu anomalies. MORB and primitive mantle nor~alizcd multi-clement plots show negative Ta and Ti anomalies in Colima andesites. The isotope ratios ran,gc from 0.70355-0.70358 for 87Sr/86Sr, 0.51295-0.51298 for 143Nd/144Nd, and 18.57-18.59, 15.56-15.58 ~md 38.27-38.31 for 2( PbP114Pb, 207J>bf204Pb, and 208pbf204Pbrespcc-tivcly. The Sr and Pb isotope ratios arc considerably lower and 143Nd/144Nd higher than in most andesites from the Mexican Volcanic Belt. |
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