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    Asymmetric distribution of lunar impact basins caused by variations in target properties

    Access Status
    Fulltext not available
    Authors
    Miljkovic, Katarina
    Wieczorek, M.
    Collins, G.
    Laneuville, M.
    Neumann, G.
    Melosh, H.
    Solomon, S.
    Phillips, R.
    Smith, D.
    Zuber, M.
    Date
    2013
    Type
    Journal Article
    
    Metadata
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    Citation
    Miljkovic, K. and Wieczorek, M. and Collins, G. and Laneuville, M. and Neumann, G. and Melosh, H. and Solomon, S. et al. 2013. Asymmetric distribution of lunar impact basins caused by variations in target properties. Science. 342 (6159): pp. 724-726.
    Source Title
    Science
    DOI
    10.1126/science.1243224
    ISSN
    0036-8075
    School
    Department of Applied Geology
    URI
    http://hdl.handle.net/20.500.11937/50670
    Collection
    • Curtin Research Publications
    Abstract

    Maps of crustal thickness derived from NASA's Gravity Recovery and Interior Laboratory (GRAIL) mission revealed more large impact basins on the nearside hemisphere of the Moon than on its farside. The enrichment in heat-producing elements and prolonged volcanic activity on the lunar nearside hemisphere indicate that the temperature of the nearside crust and upper mantle was hotter than that of the farside at the time of basin formation. Using the iSALE-2D hydrocode to model impact basin formation, we found that impacts on the hotter nearside would have formed basins with up to twice the diameter of similar impacts on the cooler farside hemisphere. The size distribution of lunar impact basins is thus not representative of the earliest inner solar system impact bombardment.

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