月衝突盆地補償メカニズムの比較研究  [in Japanese] Comparative Study of Compensation Mechanism of Lunar Impact Basins  [in Japanese]

Access this Article

Search this Article

Author(s)

Abstract

On the basis of the gravity model of the Moon developed by SELENE (Kaguya), we propose new classification and compensation mechanism of lunar impact basins. Impact basins on lunar far side and limb are classified into Type I and II basins depending on the magnitude of central gravity high in free-air and Bouguer gravity anomalies. Among previously known gravity anomalies, most typical mascons are referred as primary mascon basins. Topographic depression and rim of both Type I and II basins show good correlation between topography and free-air gravity anomaly suggesting elastic support of lunar lithosphere. Central gravity high of Type I basin is inferred to be a result of mantle uplift at the time of basin formation, and is elastically supported, too. On the other hand, free-air anomalies at the center of Type II basins are lower than Bouguer anomalies indicating brittle deformation of the basins. Topographic depression and rim of primary mascon basins on near side of the Moon show little to no free-air gravity anomalies. This indicates a result of elastic relaxation that occurred probably after eruption of mare basalts. Plateau-like signature of gravity anomalies of primary mascon basins implies viscous relaxation at crust-mantle boundary beneath the basins and significant heat (or volatile) transport by basaltic magma.

Journal

  • Journal of the Geodetic Society of Japan

    Journal of the Geodetic Society of Japan 55(2), 291-305, 2009-07-25

    The Geodetic Society of Japan

References:  29

Cited by:  5

Codes

  • NII Article ID (NAID)
    10025592886
  • NII NACSIS-CAT ID (NCID)
    AN00134900
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    00380830
  • NDL Article ID
    10427904
  • NDL Source Classification
    ZM41(科学技術--地球科学)
  • NDL Call No.
    Z15-161
  • Data Source
    CJP  CJPref  NDL  J-STAGE 
Page Top