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Crater scaling law of water ice in the gravity regime: Implications for impact history of Pluto

Research Project

Project/Area Number 16K17794
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Solid earth and planetary physics
Research InstitutionKobe University

Principal Investigator

Yasui Minami  神戸大学, 理学研究科, 助教 (30583843)

Research Collaborator TAKAGI Mare  神戸大学, 理学部
MIYANO Kana  神戸大学, 大学院理学研究科
YABE Minami  神戸大学, 大学院理学研究科
ARAKAWA Masahiko  神戸大学, 大学院理学研究科
Schulson Erland M.  Dartmouth College
Renshaw Carl E.  Dartmouth College
Iliescu Daniel  Dartmouth College
Daghlian Charles P.  Dartmouth College
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywordsクレータースケール則 / 重力支配域 / 未焼結氷 / 極低温 / クレーター形成実験 / 衝突溶融 / 脆性・塑性境界歪速度 / 一軸圧縮実験 / 多孔質氷 / 衝突溶融度 / 空隙率 / サボシステム / 高速度 / 衝突溶融層 / 未焼結雪 / 冥王星 / 衝突実験 / クレーター / 変形実験 / 脆性破壊 / 塑性変形 / 氷・シリカ混合物 / クレーター年代学
Outline of Final Research Achievements

To examine the crater scaling law for crater radius of water ice in the gravity regime applicable for crater chronology on Pluto, we developed new vertical gas gun in the cold room and conducted cratering experiments of non-sintered snow at very low temperature. As a result, a bowl-shaped crater cavity, which is a typical crater shape in the gravity regime, was observed under vacuum and at <148 degC, and the crater scaling law could be constructed. We also conducted impact experiments of sintered snow at high impact velocity (>1 km/s) to examine the cratering efficiency, and found that the cratering efficiency was lower than that of polycrystalline ice due to the impact melting.
Furthermore, we conducted uniaxial compression tests under constant strain rate on ice-silica mixtures to clarify the tectonics of surface features on icy bodies such as Pluto, and found that the strain rate showing the ductile-to-brittle transition increased with the increase of the silica volume fraction.

Academic Significance and Societal Importance of the Research Achievements

氷天体表面上の衝突クレーターは,そのサイズ頻度分布から絶対表面年代を推定することができ,そのためには極低温下での氷の重力支配域のクレータースケール則が必須であった.しかし,実験技術の困難さから,これまで調べられた例がなかった.今回の研究で,初めて極低温下における氷の重力支配域のスケール則を構築することができた.このスケール則は,衝突物理分野において今後,世界標準として広く汎用されることが期待される.さらに,このスケール則を用いることで冥王星だけでなく,外惑星領域の全ての氷天体の表面年代を推定することができ,その熱史,衝突史,地質活動史に新たな知見が得られることが期待される.

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (14 results)

All 2018 2017 2016 Other

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (10 results) (of which Int'l Joint Research: 4 results) Remarks (2 results)

  • [Journal Article] Experimental studies on mechanical properties and ductile-to-brittle transition of ice-silica mixtures: Young's modulus, compressive strength, and fracture toughness2017

    • Author(s)
      Minami Yasui, Erland M. Schulson, Carl E. Renshaw
    • Journal Title

      Journal of Geophysical Research -Solid Earth

      Volume: 122 Issue: 8 Pages: 6014-6030

    • DOI

      10.1002/2017jb014029

    • NAID

      120006368041

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 太陽系における雪氷研究の今と将来2017

    • Author(s)
      保井みなみ
    • Journal Title

      日本雪氷学会学会誌「雪氷」

      Volume: 79 Pages: 117-132

    • NAID

      40021074412

    • Related Report
      2016 Research-status Report
    • Peer Reviewed
  • [Presentation] 多孔質氷天体上への高速度クレーター形成実験:サイズスケール則に対する衝突溶融度の影響2018

    • Author(s)
      宮野加菜,保井みなみ,荒川政彦
    • Organizer
      日本地球惑星科学連合2018年大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 多孔質氷への高速度クレーター形成実験:クレーターサイズスケール則に対する衝突溶融の影響2018

    • Author(s)
      宮野加菜,保井みなみ,荒川政彦
    • Organizer
      日本惑星科学会2018年度秋季講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 氷・シリカ混合物の塑性変形・脆性破壊遷移に関する実験的研究2017

    • Author(s)
      保井みなみ,Erland M. Schulson, Carl E. Renshaw, Daniel Iliescu, Charles P. Daghlian
    • Organizer
      日本惑星科学会2017年度秋季講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] 雪標的に作られる衝突クレーター地形2017

    • Author(s)
      鈴木絢子,保井みなみ,荒川政彦,長谷川直
    • Organizer
      日本惑星科学会2017年度秋季講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] On ductile-to-brittle transition of ice-silica mixtures under compressive loading2017

    • Author(s)
      保井みなみ,Erland M. Schulson, Carl E. Renshaw, Daniel Iliescu, Charles P. Daghlian
    • Organizer
      JpGU-AGU Joint Meeting 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Mechanical properties of ice-silica mixtures: Fracture toughness and elastic moduli2017

    • Author(s)
      保井みなみ,Erland M. Schulson, Carl E. Renshaw, Daniel Iliescu, Charles P. Daghlian
    • Organizer
      JpGU-AGU Joint Meeting 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 多孔質氷の流動則に対する空隙率の効果2017

    • Author(s)
      矢部みなみ,荒川政彦,保井みなみ
    • Organizer
      JpGU-AGU Joint Meeting 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Effect of oblique impact on impact strength of planetesimals2016

    • Author(s)
      Minami Yasui, Yusaku Yoshida, Kazuma Matsue, Shota Takano, Masahiko Arakawa, Kazunori Ogawa, Chisato Okamoto
    • Organizer
      DPS 48/EPSC 11 Meeting
    • Place of Presentation
      Pasadena Convention Center (CA, USA)
    • Year and Date
      2016-10-16
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 模擬氷天体地殻を用いた強度支配域のクレータースケール則に関する実験的研究2016

    • Author(s)
      高野翔太,荒川政彦,保井みなみ,長谷川直,千秋博紀
    • Organizer
      日本惑星科学会2016年度秋季講演会
    • Place of Presentation
      ノートルダム清心女子大学(岡山県・岡山市)
    • Year and Date
      2016-09-12
    • Related Report
      2016 Research-status Report
  • [Presentation] High velocity impact experiments for frozen sands related to crater scaling laws in strength regime2016

    • Author(s)
      Shota Takano, Masahiko Arakawa, Minami Yasui, Kazuma Matsue, Sunao Hasegawa
    • Organizer
      Japan Geoscience Union Meeting 2016
    • Place of Presentation
      幕張メッセ(千葉県・千葉市)
    • Year and Date
      2016-05-22
    • Related Report
      2016 Research-status Report
  • [Remarks] 神戸大学大学院理学研究科惑星学専攻ホームページ

    • URL

      http://www.planet.sci.kobe-u.ac.jp/experiment/yasui.html

    • Related Report
      2018 Annual Research Report 2017 Research-status Report 2016 Research-status Report
  • [Remarks] 実験惑星科学研究室ホームページ

    • URL

      http://epsl.sakura.ne.jp/EPSL-Kobe/Welcome.html

    • Related Report
      2018 Annual Research Report 2017 Research-status Report 2016 Research-status Report

URL: 

Published: 2016-04-21   Modified: 2020-03-30  

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