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Ciencias planetarias: Cráter de meteorito formado por un impacto de baja velocidad
1Lunar and Planetary Laboratory, University of Arizona, Tucson, Arizona 85721, USA. jmelosh@lpl.arizona.edu
Nature
|March 11, 2005
Resumen
La formación del cráter del meteorito involucró un meteorito de hierro que impactó con la Tierra a aproximadamente 12 km/s. Esta velocidad de impacto más baja de lo esperado explica la ausencia de roca fundida de impacto significativa en el cráter.
Área de la Ciencia:
- Geología Geología Geología.
- Ciencias planetarias Ciencias planetarias.
- El cráter de impacto es el cráter de impacto.
Sus antecedentes:
- El cráter Meteor, en Arizona, es la primera estructura de impacto de meteorito terrestre reconocida.
- Se ha estudiado extensamente, sin embargo, su mecanismo de formación sigue siendo parcialmente inexplicable.
Objetivo del estudio:
- Para investigar la velocidad de impacto del meteorito responsable de la formación del cráter del meteorito.
- Para resolver la discrepancia con respecto a la falta de impacto de la roca fundida.
Principales métodos:
- Análisis de datos geológicos del cráter del meteorito.
- Modelado de la dinámica de impacto.
Principales resultados:
- Se determinó que la velocidad de impacto de la superficie del meteorito de hierro fue de aproximadamente 12 km/s.
- Esta velocidad es significativamente menor que los valores asumidos anteriormente (15-20 km/s).
Conclusiones:
- La menor velocidad de impacto explica el volumen limitado de roca fundida de impacto observada en el cráter Meteor.
- Este hallazgo revisa nuestra comprensión de la formación del cráter y los procesos de impacto asociados.
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