Study of crustal formation mechanism and origin of dichotomy of the Moon

2012 Fiscal Year Final Research Report

• Project/Area Number: 22540443
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Solid earth and planetary physics
• Research Institution: Japan Aerospace Exploration Agency
• Principal Investigator: OHTAKE Makiko 独立行政法人宇宙航空研究開発機構, 宇宙科学研究所, 助教 (30373442)
• Project Period (FY): 2010 – 2012
• Keywords: かぐや / 月 / 地殻 / 惑星起 / 進化 / 惑星探査

Research Abstract

This study apply an empirical algorithm to lunar reflectance spectra from the Kaguya and report that magnesium contents relative to iron of primitive crustal highland rocks on the farside are higher than on the nearside. Our findings indicate that the farside crust consists of rocks that crystallized from less-evolved magma than the nearside crust. This indicates that the lunar dichotomy is directly linked to crystallization of the magma ocean and suggests that the composition of the magma ocean was more primitive at the time of crustal growth than previously estimated.

Research Products

• [Journal Article] 2012, Asymmetric crustal growth on the Moon indicated by primitive farside highland materials (2012)
  • Author(s): Makiko Ohtake, Hiroshi Takeda, Tsuneo Matsunaga, Yasuhiro Yokota, Junichi Haruyama,Tomokatsu Morota, Satoru Yamamoto, Yoshiko Ogawa, Takahiro Hiroi, Yuzuru Karouji,Kazuto Saiki, Paul G. Lucey,
  • Journal Title: Nature Geoscience Volume: 5 Pages: 384-388
• [Journal Article] 月裏側高地物質サンプルリターンミッションの提案 (2012)
  • Author(s): 大竹真紀子,荒井 朋子,武田 弘,唐牛 譲,佐伯 和人,諸田 智克,小林 進悟,大槻 真嗣,國井 康晴
  • Journal Title: 遊星人 Volume: 21 Pages: 217-223
• [Presentation] 月高地地殻の化学組成から推定する高地地殻形成過程 (2012)
  • Author(s): 大竹真紀子,武田弘,松永恒雄,横田康弘,春山純一,諸田智克,石原吉明,山本聡,小川佳子,廣井孝弘,唐牛譲,佐伯和人
  • Organizer: 日本惑星科学会 日本惑星科学会2012年度秋季講演会
  • Place of Presentation: 神戸大学
  • Year and Date: 20121024-26
• [Presentation] New Understanding of the Lunar Highland Crust and Candidate for Future Lunar (2012)
  • Author(s): Ohtake, Makiko
  • Organizer: Exploration MeteoriticalSociety 75th Annual Meeting of the Meteoritical Society 5150
  • Place of Presentation: Cairns, Australia (招待講演)
  • Year and Date: 20120812-17
• [Presentation] かぐや分光データを用いた月高地地殻の鉱物量比とMg#の深さ方向変化 (2012)
  • Author(s): 大竹真紀子,武田弘,松永恒雄,横田康弘,春山純一,諸田智克,石原吉明,山本聡,小川佳子,廣井孝弘,唐牛譲,佐伯和人
  • Organizer: Japan Geoscience Union Japan Geoscience Union Meeting 2012
  • Place of Presentation: 幕張メッセ
  • Year and Date: 20120520-25
• [Remarks]
  • URL: http://www.jspec.jaxa.jp/hottopics/20120605.html
• [Remarks]
  • URL: http://www.geochem.jp/information/info/120613.html