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Las relaciones helio/dióxido de carbono como precursores de la actividad volcánica
Resumen
El monitoreo de gases volcánicos en Kilauea reveló que las proporciones de helio a dióxido de carbono en las emisiones de fumarolas disminuyeron significativamente antes o durante los eventos de liberación de magma, lo que indica cambios en la actividad volcánica.
Área de la Ciencia:
- La geoquímica es la geoquímica.
- Volcanología Volcanología.
- Ciencias de la Tierra Ciencias de la Tierra Ciencias de la Tierra
Sus antecedentes:
- Las fumarolas son respiraderos volcánicos que liberan gases.
- Comprender la composición de los gases volcánicos es crucial para monitorear el movimiento del magma.
- El volcán Kilauea proporciona un entorno dinámico para el estudio de los procesos volcánicos.
Objetivo del estudio:
- Para monitorear las emisiones de gases de las fumarolas de la cumbre del volcán Kilauea.
- Para investigar la relación entre la composición del gas y los eventos de liberación de magma.
Principales métodos:
- Monitoreo continuo de la composición de gases de fumarola durante dos años.
- Análisis de las proporciones de helio (He) y dióxido de carbono (CO2).
- Correlación de los datos de gas con eventos conocidos de liberación de magma.
Principales resultados:
- Se observaron disminuciones sustanciales en la relación He/CO2 en los gases fumarolas.
- Estas disminuciones ocurrieron antes o durante tres eventos distintos de liberación de magma.
- La composición del gas volvió a los niveles de referencia durante los períodos de quiescencia volcánica.
Conclusiones:
- La relación He/CO2 sirve como un indicador sensible del ascenso del magma y la desgasificación en Kilauea.
- Los cambios en las proporciones de gas pueden proporcionar advertencias tempranas de disturbios volcánicos.
- Este método de monitoreo mejora la comprensión de los procesos magmáticos debajo de los volcanes activos.
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