Importance of amorphous silicates as source material of the solid planets and its initial evolution

2011 Fiscal Year Final Research Report

• Project/Area Number: 19104012
• Research Category: Grant-in-Aid for Scientific Research (S)
• Allocation Type: Single-year Grants
• Research Field: Petrology/Mineralogy/Science of ore deposit
• Research Institution: Osaka University
• Principal Investigator: TSUCHIYAMA Akira 大阪大学, 大学院・理学研究科, 教授 (90180017)
• Co-Investigator(Renkei-kenkyūsha): NOGUCHI Takaaki 茨城大学, 理学部, 教授 (40222195) ; NAKAMURA Tomoki 東北大学, 大学院・理学研究科, 教授 (20260721)
• Project Period (FY): 2007 – 2011
• Keywords: 星周塵 / 彗星 / 小惑星 / 非晶質珪酸塩 / 結晶化 / 水質変成作用 / スターダスト計画 / はやぶさ計画

Research Abstract

Based on experimental study, we have proposed a model of solid particle evolution from the universe to the solar system, where silicate minerals observed were crystallized from amorphous silicates. Stardust and Hayabusa sample analysis shows that cometary material is amorphous silicate mixed with high-temperature materials and S-type asteroid material is ordinary chondrite suffered by thermal metamorphism. Amorphous silicates with high reactivity and compositional valiety caused prompt reaction during hydrothermal metamorphism. These results showed that source material of the solar system is consistent with amorphous silicates.

Research Products

• [Journal Article] Three-dimensional observation and morphological analysis of organic nanoglobules in a carbonaceous chondrite using X-ray micro-tomography (2012)
  • Author(s): T. Matsumoto, A. Tsuchiyama, K. Nakamura-Messenger, T. Nakano, K. Uesugi, A. Takeuchi, and M. E. Zolensky
  • Journal Title: Geochimicaet Cosmochimica Acta, in print
  • Peer Reviewed
• [Journal Article] Crystallization experiments of SiO_2-rich amorphous silicate : Application to SiO_2-rich circumstellar dust and GEMS (2012)
  • Author(s): J. Matsuno, A. Tsuchiyama, C. Koike, H. Chihara, Y. Imai, and R. Noguchi
  • Journal Title: AstrophysicalJournal Volume: (in print)
  • Peer Reviewed
• [Journal Article] Three-Dimensional Structure of Hayabusa Samples : Origin and Evolution of Itokawa Regolith (2011)
  • Author(s): A. Tsuchiyama, M. Uesugi, T. Matsushima, T. Michikami, T. Kadono, T. Nakamura, K. Uesugi, T. Nakano, S. A. Sandford, R. Noguchi, T. Matsumoto, J. Matsuno, T. Nagano, Y. Imai, A. Takeuchi, Y. Suzuki, T. Ogami, J. Katagiri, M. Ebihara, T. R. Ireland, F. Kitajima, K. Nagao, H. Naraoka, T. Noguchi, R. Okazaki, H. Yurimoto, M. E. Zolensky, T. Mukai, M. Abe, T. Yada, A. Fujimura, M. Yoshikawa, J. Kawaguchi
  • Journal Title: Science Volume: 333 Pages: 1125-1128
  • Peer Reviewed
• [Journal Article] Itokawa Dust Particles : A Direct Link Between S-Type Asteroids and Ordinary Chondrites (2011)
  • Author(s): T. Nakamura, T. Noguchi, M. Tanaka, M. E. Zolensky, M. Kimura, A. Tsuchiyama, A. Nakato, T. Ogami, H. Ishida, M. Uesugi, T. Yada, K. Shirai, A. Fujimura, R. Okazaki, S. A. Sandford, Y. Ishibashi, M. Abe, T. Okada, M. Ueno, T. Mukai, M. Yoshikawa, J. Kawaguchi
  • Journal Title: Science Volume: 333 Pages: 1113-1116
  • Peer Reviewed
• [Journal Article] Size and density estimation from impact track morphology in silica aerogel : Application to dust of comet 81P/ Wild 2 (2011)
  • Author(s): R. Niimi, T. Kadono, A. Tsichiyama, K. Okudaira, S. Hasegawa, M. Tabata, T. Watanabe, M. Yagishita, N. Mcachii, A. M. Nakamura, K. Uesugi, A. Takeuchi, and T. Nakano
  • Journal Title: Icurus Volume: 211 Pages: 986-992
  • Peer Reviewed
• [Journal Article] Effect of forsterite grain shape on infrared spectra (2010)
  • Author(s): C. Koike, Y. Imai, H. Chihara, H. Suto, K. Murata, A. Tsuchiyama, S. Tachibana, and S. Ohara
  • Journal Title: The Astrophysical Journal Volume: 709 Pages: 983-992
  • Peer Reviewed
• [Journal Article] Three-dimensional structures and elemental distributions of Stardust impact tracks using synchrotron microtomography and X-ray fluorescence analysis (2009)
  • Author(s): A. Tsuchiyama, T. Nakamura, T. Okazaki, K. Uesugi, T. Nakano, K. Sakamoto, T. Akaki, Y. Iida, T. Kadono, K. Jogo, and Y. Suzuki
  • Journal Title: Meteoritics and Planetary Science Volume: 44 Pages: 1203-1224
  • Peer Reviewed
• [Journal Article] Mg/ Fe fractionation in circumstellar silicate dust involved in crystallization (2009)
  • Author(s): K. Murata, T. Takakura, H. Chihara, C. Koike, and A. Tsuchiyama
  • Journal Title: The AstrophysicalJournal Volume: 696 Pages: 1612-1615
  • Peer Reviewed
• [Journal Article] Crystallization experiments on amorphous magnesium silicate. I. Estimation of activation energy of enstatite crystallization (2009)
  • Author(s): K. Murata, H. Chihara, C. Koike, T. Takakura, Y. Imai, and A. Tsuchiyama
  • Journal Title: TheAstrophysical Journal Volume: 697 Pages: 836-842
  • Peer Reviewed
• [Journal Article] Crystallization experiments on amorphous magnesium silicate. II. Effect of stacking faults on infrared spectra of enstatite (2009)
  • Author(s): K. Murata, H. Chihara, C. Koike, T. Takakura, T. Noguchi, Y. Imai, and A. Tsuchiyama
  • Journal Title: The AstrophysicalJournal Volume: 698 Pages: 1903-1906
  • Peer Reviewed
• [Journal Article] Chondrule-like Objects in Short-Period Comet 81P/ Wild 2 (2008)
  • Author(s): T. Nakamura, T. Noguchi, A. Tsuchiyama, T. Ushikubo, N. T. Kita, J. W. Valley, M. E. Zolensky, Y. Kakazu, K. Sakamoto, E. Mashio, K. Uesugi, T. Nakano
  • Journal Title: Science Volume: 321 Pages: 1664-1667
  • Peer Reviewed
• [Journal Article] Crystallization experiments on amorphous silicates with chondritic composition : quantitative formulation of the crystallization (2007)
  • Author(s): K. Murata, H. Chihara, A. Tsuchiyama, C. Koike, and T. Takakura
  • Journal Title: The Astrophysical Journal Volume: 668 Pages: 285-293
  • Peer Reviewed
• [Presentation] Hydrothermal alteration experiment of amorphous silicates : Effect of organic-inorganic interaction (2012)
  • Author(s): R. Noguchi, A. Tsuchiyama, H. Yabuta, and S. Ichikawa
  • Organizer: 74^<th> Annual Meteoritical SocietyMeeting
  • Place of Presentation: London(UK)
  • Year and Date: 2012-08-11
• [Presentation] Preliminary examination of particles recovered from the surface of the Asteroid 25143 Itokawa by the Hayabusa mission (2011)
  • Author(s): A. Tsuchiyama et al
  • Organizer: Lunar and Planetary Science Conference, XLII
  • Place of Presentation: Woodlands, TX(USA)
  • Year and Date: 20110307-11
• [Presentation] Reduction experiments of amorphous silicates with the mean composition of GEMS (2011)
  • Author(s): J. Matsuno, A. Tsuchiyama, R. Noguchi, A. Miyake, N. Shimobayashi, S. Ichikawa, and N. Souma
  • Organizer: Lunar and Planetary Science Conference, XLII
  • Place of Presentation: Woodlands, TX(USA)
  • Year and Date: 20110307-11