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El reciente levantamiento de la corteza en el parque nacional de Yellowstone
Science (New York, N.Y.)
|December 7, 1979
Resumen
La caldera de Yellowstone está experimentando una rápida elevación, con los niveles del suelo subiendo más de 700 milímetros desde 1923. Esta deformación geológica es probablemente causada por una reciente afluencia de magma debajo de la superficie.
Área de la Ciencia:
- La geofísica es la geofísica.
- Volcanología Volcanología.
- La geodesia es una técnica de geodesia.
Sus antecedentes:
- La caldera de Yellowstone es un gran sistema volcánico con una historia de erupciones masivas.
- La comprensión de la deformación de la corteza es crucial para el monitoreo de la actividad volcánica.
Objetivo del estudio:
- Para analizar los datos históricos de nivelación precisa para detectar la deformación del suelo en la caldera de Yellowstone.
- Para investigar la causa de la elevación de la superficie observada.
Principales métodos:
- Comparación de mediciones precisas de nivelación de 1923 con datos de 1975, 1976 y 1977.
- Análisis del desplazamiento vertical del suelo a lo largo del tiempo.
Principales resultados:
- Se detectó una elevación relativa significativa de la caldera de Yellowstone (más de 700 mm) desde 1923.
- La tasa promedio de elevación es de aproximadamente 14 mm por año, lo que indica una rápida deformación.
- El levantamiento es inusualmente grande en comparación con los procesos geológicos típicos.
Conclusiones:
- La elevación rápida observada sugiere una afluencia reciente de material fundido o parcialmente fundido en la corteza debajo de la caldera de Yellowstone.
- Este evento geológico indica un posible malestar dentro del sistema volcánico.
- El monitoreo continuo es esencial para comprender las implicaciones de esta actividad magmática.
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