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Published on: August 7, 2017
El Monte St. Helens, Washington, erupción volcánica de 1980: componente de gas magmático durante los primeros 16 días
Resumen
El Monte St. Helens mostró bajas emisiones de dióxido de azufre y un mínimo de gas magmático, lo que indica un pequeño componente eruptivo. Se recomienda el monitoreo geoquímico continuo debido a la posibilidad de una futura actividad violenta.
Área de la Ciencia:
- La geoquímica es la geoquímica.
- Volcanología Volcanología.
Sus antecedentes:
- El Monte St. Helens, Washington, es un estratovolcán activo conocido por su significativa erupción de 1980.
- Comprender las características geoquímicas de las erupciones en curso es crucial para la evaluación del peligro.
Objetivo del estudio:
- Evaluar el componente de gas magmático y los peligros potenciales para la salud asociados con las recientes columnas de erupción del Monte St. Helens.
- Informar las estrategias de monitoreo continuo de la actividad volcánica.
Principales métodos:
- Análisis de las tasas de emisión de dióxido de azufre (SO2) de las columnas de erupción.
- Análisis de lixiviación de cenizas volcánicas para determinar las relaciones entre azufre (S) y cloro (Cl).
- Examen microscópico de los fragmentos de ceniza para la no vesicularidad.
Principales resultados:
- Se detectaron bajas tasas de emisión de dióxido de azufre.
- Los lixiviados de cenizas volcánicas exhibieron bajas proporciones de azufre a cloro.
- Los fragmentos de ceniza eran predominantemente no vesiculares, lo que sugiere una interacción limitada de gas magmático.
Conclusiones:
- Los datos geoquímicos indican un pequeño componente magmático eruptivo en la actividad reciente.
- Los bajos niveles de flúor soluble en las cenizas no representan riesgos inmediatos para la salud.
- A pesar de las bajas emisiones actuales, el potencial de actividad magmática violenta requiere un monitoreo geoquímico continuo.
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