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Volatilization gravimetry is an analytical technique that measures the mass lost due to the volatilization of the substance. This technique is used to estimate the amount of volatile material in a sample. To perform this method, heat a known amount of the sample to a high temperature in a crucible or other suitable vessel. The volatile substance in the sample evaporates, and the vapor is completely expelled from the crucible either by heating the sample or bubbling a stream of inert gas through...

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Data Processing Methods for 3D Seismic Imaging of Subsurface Volcanoes: Applications to the Tarim Flood Basalt

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Colapso volcánico catastrófico: relación con los procesos hidrotermales.

D L López, S N Williams

Science (New York, N.Y.)

|June 18, 1993

Resumen

El colapso volcánico puede ocurrir sin magma, impulsado por fluidos hidrotermales que interactúan con el volcán. Este estudio modela el colapso en el Nevado del Ruiz, vinculando la actividad hidrotermal a la inestabilidad del edificio.

Área de la Ciencia:

Geología Geología Geología.
Volcanología Volcanología.
La geoquímica es la geoquímica.

Sus antecedentes:

El colapso volcánico catastrófico a menudo ocurre sin actividad magmática previa, lo que representa peligros significativos.
Los sistemas hidrotermales son cada vez más reconocidos como factores críticos en la estabilidad del edificio volcánico.

Objetivo del estudio:

Para investigar el papel de las interacciones fluido-roca hidrotermales en el colapso volcánico.
Para modelar posibles mecanismos de colapso en el volcán Nevado del Ruiz, Colombia.

Principales métodos:

Análisis de la extensión y ubicación de las descargas hidrotermales.
Caracterización de la química del agua de aguas termales, los tiempos de residencia y las rutas de flujo.
Modelado de las interacciones fluido-edificio hidrotermales y su impacto en la integridad estructural.

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Principales resultados:

La actividad hidrotermal en el Nevado del Ruiz sugiere un mecanismo de colapso independiente de la intrusión magmática.
La disolución de la roca y la alteración hidrotermal, exacerbadas por desencadenantes físicos como los terremotos, pueden conducir a la falla del edificio.
Los parámetros modelados para Nevado del Ruiz se alinean con las observaciones en otros volcanes que experimentan el colapso.

Conclusiones:

Los procesos hidrotermales son un factor importante, a menudo subestimado, del colapso volcánico catastrófico.
Comprender los sistemas hidrotermales es crucial para evaluar los peligros volcánicos y predecir eventos de colapso.
El estudio de caso Nevado del Ruiz proporciona un marco para evaluar el potencial de colapso en otros estratovolcanes.