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Formación de delta escalonado marciano por la rápida liberación de agua

Erin R Kraal¹, Maurits van Dijk, George Postma

¹Faculty of Geosciences, Utrecht University, Postbus 80115, 3508 TC, Utrecht, The Netherlands. ekraal@vt.edu

|February 22, 2008

Resumen

Los deltas marcianos escalonados sugieren que las aguas superficiales fluyeron solo durante decenas de años, no millones. Este hallazgo proporciona nuevas restricciones en Marte.

Área de la Ciencia:

Ciencias planetarias Ciencias planetarias.
Geología Geología Geología.
Hidrología Hidrología Hidrología.

Sus antecedentes:

Los deltas y los ventiladores aluviales en Marte son indicadores clave del flujo de agua superficial en el pasado.
Estudios morfológicos anteriores ofrecieron amplias estimaciones de tiempo (de décadas a millones de años) para eventos hidrológicos marcianos.
Comprender la formación de los deltas marcianos es crucial para reconstruir la historia del agua del planeta.

Objetivo del estudio:

Para investigar la escala de tiempo de formación de distintos deltas marcianos escalonados (terrasados).
Para restringir la duración y la magnitud de los eventos pasados de flujo de agua de superficie en Marte.

Principales métodos:

Utilizamos experimentos de flujo de arena para simular la formación del delta.
Analizó la morfología resultante para inferir procesos de formación y escalas de tiempo.

Principales resultados:

Los deltas escalonados marcianos probablemente se formaron a partir de un solo evento de llenado de cuencas.
Este evento ocurrió en un corto período de tiempo, estimado en decenas de años.
El volumen de agua requerido es comparable a los grandes ríos terrestres como el Mississippi.

Conclusiones:

Los deltas escalonados proporcionan restricciones mínimas y máximas en la duración de algunos flujos superficiales marcianos.
Los hallazgos apoyan una hipótesis de liberación repentina de agua del almacenamiento subterráneo.
Esta rápida liberación probablemente formó depósitos del delta en terrazas sobre los ventiladores aluviales.

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