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Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction
Published on: May 20, 2018
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Debilitamiento de la sal de roca por el agua durante el arrastre a largo plazo
Nature
|March 9, 2018
Resumen
Las pequeñas cantidades de salmuera tienen un impacto significativo en la sal de roca
Área de la Ciencia:
- Geología y Ciencias de los Materiales
Sus antecedentes:
- La reología de las sales de roca es fundamental para los depósitos de residuos nucleares y el almacenamiento geológico.
- Los modelos existentes basados en la sal seca no pueden predecir el flujo de sal natural y la microestructura.
- Las discrepancias surgen de la influencia de trazas de salmuera, a menudo ausentes en entornos de laboratorio.
Objetivo del estudio:
- Para investigar el papel de la salmuera en el comportamiento reológico de la sal de roca.
- Para explicar las discrepancias entre los experimentos de laboratorio y la deformación natural de la sal.
Principales métodos:
- Pruebas experimentales de muestras de sal seca y salmuera en condiciones variables.
- Análisis de los cambios microstruturales y de los mecanismos de deformación.
Principales resultados:
- La sal seca exhibe un desplazamiento convencional.
- La sal sal salobre muestra un debilitamiento significativo a bajas tasas de deformación.
- El debilitamiento está relacionado con la recristalización dinámica y un cambio a la deriva de transferencia de solución.
Conclusiones:
- La salmuera es un factor crítico en la reología de la sal de roca natural.
- Las leyes actuales de desplazamiento pueden ser inadecuadas para predecir el comportamiento de la sal a largo plazo en la naturaleza.
- La salmuera influye en los mecanismos de deformación, lo que lleva a un flujo más rápido de lo previsto por los modelos secos.
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