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Published on: August 17, 2016
Terremotos de enfoque profundo y reciclaje de agua en el manto de la Tierra
Resumen
Los terremotos de enfoque profundo desconciertan a los científicos. Una nueva investigación sugiere que los terremotos profundos pueden ser el resultado de inestabilidades rocosas inducidas por el agua, revelando un ciclo de agua del océano que regresa al interior de la Tierra.
Área de la Ciencia:
- La geofísica es la geofísica.
- Sismología Sismología Sismología.
- La geoquímica es la geoquímica.
Sus antecedentes:
- Los terremotos de foco profundo (100-650 km) desafían la mecánica convencional de las rocas.
- Las rocas a estas profundidades deben deformarse plásticamente, no fracturarse fácilmente.
Objetivo del estudio:
- Para explicar el mecanismo detrás de la sismicidad de enfoque profundo.
- Para investigar el papel del agua en los procesos profundos de la Tierra.
Principales métodos:
- Experimentos de laboratorio que simulan las condiciones profundas de la Tierra.
- Análisis de presiones y temperaturas en las zonas de subducción.
Principales resultados:
- La sismicidad profunda puede ser causada por la deshidratación y los cambios estructurales en la litosfera hidratada de subducción.
- El agua juega un papel crítico en el desencadenamiento de estos eventos.
Conclusiones:
- Los terremotos de enfoque profundo proporcionan evidencia de la recirculación del agua de los océanos hacia las profundidades de la Tierra.
- Esta investigación vincula los ciclos de las aguas superficiales con los procesos del manto profundo.
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