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Magmatismo de la meseta de Colorado y elevación por el calentamiento de la litosfera heterogénea
Mousumi Roy1, Thomas H Jordan, Joel Pederson
1Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, New Mexico 87131, USA. mroy@unm.edu
Nature
|June 19, 2009
Resumen
La meseta de Colorado es la meseta de Colorado.
Área de la Ciencia:
- La geodinámica es la geodinámica.
- La tectónica es la tectónica.
- El levantamiento de la meseta.
Sus antecedentes:
- El mecanismo de elevación de la roca de la meseta de Colorado sigue siendo objeto de debate.
- Experimentó una elevación significativa sin mayor deformación interna, a diferencia de las regiones adyacentes.
Objetivo del estudio:
- Proponer y probar un modelo geodinámico para el levantamiento de rocas de la meseta de Colorado.
- Para explicar los contrastes geológicos y geofísicos observados a través de la meseta.
Principales métodos:
- Modelado geodinámico del calentamiento litosférico y reequilibrio conductivo.
- Análisis de la invasión del magmatismo del Cenozoico y datos de gravedad.
Principales resultados:
- El calentamiento de la litosfera después de la eliminación de la placa de Farallon impulsa la elevación de la meseta.
- El modelo explica la invasión del magmatismo (3-6 km/Myr) y las anomalías geofísicas marginales.
Conclusiones:
- El calentamiento litosférico posterior al Cenozoico medio es el principal impulsor de la elevación epeirogénica de la meseta de Colorado.
- Este mecanismo es potencialmente significativo para otras configuraciones interiores de placas.
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