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Un evento de reorganización rápida de placas tectónicas impulsado por cambios en las ubicaciones de subducción en un
Joshua M Guerrero1, Chad W Fairservice2, Pejvak Javaheri3
1Institute of Earth Sciences, Academia Sinica, Taipei City, 11529, Taiwan. joshua@earth.sinica.edu.tw.
Scientific reports
|September 2, 2025
Resumen
Los eventos de reorganización tectónica de placas, vinculados a la subducción, pueden desencadenarse por el calor profundo del manto. Este estudio modela cómo las anomalías térmicas impulsan grandes cambios en el movimiento de las placas durante millones de años.
Área de la Ciencia:
- La geofísica
- Tectónica
- La geodinámica
Sus antecedentes:
- Los eventos de reorganización tectónica de placas se registran en la historia geológica.
- Estos eventos a menudo están relacionados con el inicio o el cese de las zonas de subducción.
- El inicio de la subducción, como la que forma la curva de la cadena submarina Hawaii-Emperor, causa cambios significativos en el movimiento de la placa.
Objetivo del estudio:
- Investigar los mecanismos que impulsan los principales eventos de reorganización de las placas.
- Para analizar los cambios en el movimiento de la placa utilizando el modelado numérico de la convección del manto.
- Para identificar los desencadenantes de los cambios abruptos en la dinámica de la placa global.
Principales métodos:
- Utilizó un modelo numérico de convección del manto global.
- Desarrolló un método para identificar los límites de las placas dentro del modelo.
- Serie temporal vectorial de Euler calculada para placas generadas de forma autoconsistente durante más de 144 millones de años.
Principales resultados:
- Se observó un importante evento de reorganización de placas durante 6-8 Myr, identificado por el seguimiento de tres placas que comparten una triple unión.
- La evolución global presentó dos límites convergentes dominantes, con números de placas que varían de 9 a 14.
- El evento fue catalizado por una característica térmica profunda dentro de la convección calentada internamente.
Conclusiones:
- Las características térmicas del manto profundo pueden actuar como catalizadores para la reorganización de placas.
- La acumulación de flotabilidad de la acumulación de calor alrededor de las profundidades del manto puede alterar las trayectorias de las placas.
- Estos hallazgos proporcionan información sobre la evolución dinámica de las placas tectónicas de la Tierra.
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