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    Formation of the Orientale lunar multiring basin

    Access Status
    Fulltext not available
    Authors
    Johnson, B.
    Blair, D.
    Collins, G.
    Melosh, H.
    Freed, A.
    Taylor, G.
    Head, J.
    Wieczorek, M.
    Andrews-Hanna, J.
    Nimmo, F.
    Keane, J.
    Miljkovic, Katarina
    Soderblom, J.
    Zuber, M.
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Johnson, B. and Blair, D. and Collins, G. and Melosh, H. and Freed, A. and Taylor, G. and Head, J. et al. 2016. Formation of the Orientale lunar multiring basin. Science. 354 (6311): pp. 441-444.
    Source Title
    Science
    DOI
    10.1126/science.aag0518
    ISSN
    0036-8075
    School
    Department of Applied Geology
    URI
    http://hdl.handle.net/20.500.11937/51083
    Collection
    • Curtin Research Publications
    Abstract

    Multiring basins, large impact craters characterized by multiple concentric topographic rings, dominate the stratigraphy, tectonics, and crustal structure of the Moon. Using a hydrocode, we simulated the formation of the Orientale multiring basin, producing a subsurface structure consistent with high-resolution gravity data from the Gravity Recovery and Interior Laboratory (GRAIL) spacecraft. The simulated impact produced a transient crater, ~390 kilometers in diameter, that was not maintained because of subsequent gravitational collapse. Our simulations indicate that the flow of warm weak material at depth was crucial to the formation of the basin's outer rings, which are large normal faults that formed at different times during the collapse stage. The key parameters controlling ring location and spacing are impactor diameter and lunar thermal gradients.

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