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Modos de inclinación durante el desarrollo del complejo de núcleo extensional
Science (New York, N.Y.)
|January 14, 1994
Resumen
La formación del complejo del núcleo de las Montañas Minerales implicó la inclinación del batolito durante la deformación de la falla. La elevación y inclinación de la pared del pie son procesos cruciales en el desarrollo complejo del núcleo extensional.
Área de la Ciencia:
- Geología Geología Geología.
- La tectónica es la tectónica.
- Geología Estructural Geología Estructural
Sus antecedentes:
- El complejo del núcleo de las Montañas Minerales en Utah proporciona un ejemplo clave para estudiar la extensión de la corteza terrestre.
- Comprender los procesos de deformación dentro de los complejos del núcleo es esencial para la investigación de la tectónica de placas.
Objetivo del estudio:
- Para investigar el papel de la deformación de la pared colgante y la pared del pie en la formación del complejo central de las Montañas Minerales.
- Para determinar el momento y la magnitud de la inclinación asociada con la falla de Beaver Valley y la falla de desprendimiento de Cave Canyon.
Principales métodos:
- Análisis estructural del batholito de las Montañas Minerales y fallas asociadas.
- Cartografía geológica para identificar diques deformados y estructuras de fallas.
- Datar los eventos geológicos para establecer una línea de tiempo para la deformación.
Principales resultados:
- El batholito de las Montañas Minerales experimentó aproximadamente 45 grados de inclinación debido al plegamiento en la pared colgante de la falla del Valle del Castor (hace 11-9 millones de años).
- El posterior destapado a lo largo de la falla de desprendimiento de Cave Canyon resultó en una inclinación adicional de ~ 40 grados durante la elevación de la pared del pie.
- Los diques deformados debajo de la falla de desprendimiento confirman una inclinación significativa de la pared del pie durante la formación del complejo del núcleo.
Conclusiones:
- La inclinación de la pared del pie es un componente crítico en el desarrollo de complejos de núcleos extensivos.
- El rebote de la pared del pie juega un papel importante en el proceso de extensión general durante la formación del núcleo complejo.
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