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Tectónica y evolución de Venus.

R J Phillips, W M Kaula, G E McGill

    Science (New York, N.Y.)
    |May 22, 1981
    PubMed
    Resumen
    Este resumen es generado por máquina.

    La tectónica de Venus carece de características similares a las de la Tierra, como la subida de los océanos. Su corteza antigua y las altas temperaturas probablemente detuvieron la tectónica de placas hace más de mil millones de años, con tierras altas apoyadas por puntos calientes.

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    Área de la Ciencia:

    • Ciencias planetarias Ciencias planetarias.
    • Geología Geología Geología.
    • La geofísica es la geofísica.

    Sus antecedentes:

    • Venus exhibe una tectónica global única y distinta a la de la Tierra.
    • Las características de la superficie incluyen terreno ondulado y tierras altas limitadas, con la gravedad correlacionada positivamente con la topografía.
    • Una corteza antigua y altas temperaturas superficiales impiden la subducción en Venus.

    Objetivo del estudio:

    • Para analizar los distintivos procesos tectónicos de Venus.
    • Comprender los mecanismos de apoyo para las tierras altas de Venus.
    • Para investigar el cese de la tectónica de placas en Venus.

    Principales métodos:

    • Análisis de la topografía de la superficie y los datos de gravedad.
    • Modelado geológico del soporte de la corteza y los regímenes térmicos.
    • Comparación de la tectónica venusiana con los modelos terrestres.

    Principales resultados:

    • Venus carece de crestas oceánicas similares a las de la Tierra; las tierras altas se compensan a una profundidad de ~ 100 km.
    • La gravedad y la topografía muestran una correlación positiva en todas las longitudes de onda.
    • La evidencia sugiere la desestabilización del agua y el cese de la tectónica de placas hace más de mil millones de años.

    Conclusiones:

    • Las tierras altas de Venus están activamente apoyadas, probablemente por plumas de manto o puntos calientes.
    • El estilo tectónico del planeta es antiguo e influenciado por su alta temperatura superficial.
    • La ausencia de tectónica de placas similar a la de la Tierra está relacionada con la pérdida de agua superficial y las condiciones térmicas.