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Las densidades de cráteres de impacto en los volcanes y las coronas en Venus: implicaciones para el resurgimiento
Science (New York, N.Y.)
|August 12, 1994
Resumen
La densidad de los cráteres de impacto en los volcanes y coronas de Venus sugiere una actividad volcánica en curso. Estos hallazgos desafían los modelos existentes de reaparición planetaria, lo que indica actividad en los últimos 500 millones de años.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Geología Geología Geología.
- Volcanología Volcanología.
Sus antecedentes:
- Venus exhibe una geología de superficie variada con cráteres de impacto, volcanes y coronas.
- Comprender la distribución y la densidad de los cráteres de impacto es crucial para determinar la edad y la historia de resurgimiento de los cuerpos planetarios.
Objetivo del estudio:
- Para analizar las densidades de cráteres de impacto en grandes volcanes y coronas en Venus.
- Para inferir la actividad volcánica y la historia de reaparición en la superficie de Venus.
Principales métodos:
- El análisis del cráter de impacto cuenta con las características geológicas de Venus.
- Comparación de las densidades de cráteres con promedios globales y modelos teóricos.
Principales resultados:
- La densidad de los cráteres de impacto en los grandes volcanes venusianos es aproximadamente la mitad del promedio mundial.
- Las coronas con extensos depósitos volcánicos asociados muestran densidades de cráteres más bajas que el promedio mundial.
- Algunas clases de coronae no difieren significativamente de la densidad promedio global de cráteres.
Conclusiones:
- Las densidades de cráter observadas son inconsistentes con los modelos de resurgimiento global de una sola edad o de estado estacionario.
- Los volcanes y las coronas con el vulcanismo asociado han estado activos en Venus durante al menos los últimos 500 millones de años.
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