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Thread: Volcanoes on the Inner Planets of the Solar System

  1. #1
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    Volcanoes on the Inner Planets of the Solar System

    How has vulcanism reshaped the worlds of the Solar System?

    https://arxiv.org/abs/2005.13200
    On The Geological Time Evolution of Volcanism in the Inner Solar System
    Varnana.M.Kumar, T.E.Girish, Thara.N.Sathyan, Biju Longhinos, Anjana A.V.Panicker, J.Binoy
    [Submitted on 27 May 2020]
    We have studied the geological time evolution of volcanism in Earth and other inner solar system planetary bodies (Mercury, Moon, Mars and Venus) in both geophysical and biophysical perspective. The record of Large Igneous Provinces in Earth and other planetary objects suggest the existence of increasing, decreasing and cessation phases of major volcanic activity over geological time scales. We have extended the existing scale of measuring intensity of volcanic eruptions based on Earth based observations to accommodate intense and extreme volcanic activity. The mass of a rocky planetary object is found to be related to the magnitude of the internal heat, occurrences of Large Igneous Provinces and the duration of major volcanic activity from relevant data available for the inner solar system. The internal heat magnitude may also decide the intensity of volcanism in these planetary objects. The time evolution of volcanism in Earth and Mars has probably influenced the origin of life and biological evolution in these planets.
    Do good work. —Virgil Ivan "Gus" Grissom

  2. #2
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    "Recent" is a relative term, but Mars might have been active volcanically not long ago.


    https://arxiv.org/abs/2011.05956

    Evidence for geologically recent explosive volcanism in Elysium Planitia, Mars

    David G. Horvath, Pranabendu Moitra, Christopher W. Hamilton, Robert A. Craddock, Jeffrey C. Andrews-Hanna

    Volcanic activity on Mars peaked during the Noachian and Hesperian periods but has continued since then in isolated locales. Elysium Planitia hosts numerous young, fissure-fed flood lavas with ages ranging from approximately 500 to 2.5 million years (Ma). We present evidence for what may be the youngest volcanic deposit yet documented on Mars: a low albedo, high thermal inertia, high-calcium pyroxene-rich deposit distributed symmetrically around a segment of the Cerberus Fossae fissure system in Elysium Planitia. This deposit is similar to features interpreted as pyroclastic deposits on the Moon and Mercury. However, unlike previously documented lava flows in Elysium Planitia, this feature is morphologically consistent with a fissure-fed pyroclastic deposit, mantling the surrounding lava flows with a thickness on the order of tens of cm over most of the deposit and a volume of 1.1-2.8E7 cubic meters. Thickness and volume estimates are consistent with tephra fall deposits on Earth. Stratigraphic relationships indicate a relative age younger than the surrounding volcanic plains and the Zunil impact crater (~0.1-1 Ma), with crater counting suggesting an absolute model age of 53 to 210 ka. This young age implies that if this deposit is of volcanic origin then the Cerberus Fossae region may not be extinct and Mars may still be volcanically active today. This interpretation is consistent with the identification of seismicity in this region by the Interior Exploration using Seismic Investigations, Geodesy, and Heat Transport (InSight) lander, and has additional implications for astrobiology and the source of transient atmospheric methane.
    Do good work. —Virgil Ivan "Gus" Grissom

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