Anatomy of protosolar system

2010 Fiscal Year Self-evaluation Report

• Project/Area Number: 20002002
• Research Category: Grant-in-Aid for Specially Promoted Research
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering; Mathematics and Physics
• Research Institution: Hokkaido University
• Principal Investigator: YURIMOTO Hisayoshi Hokkaido University, 大学院・理学研究院, 教授 (80191485)
• Project Period (FY): 2008 – 2012
• Keywords: 地球化学 / 宇宙化学 / 惑星起源・進化 / 同位体 / 隕石

Research Abstract

太陽系形成以前に宇宙空間に存在していた物質が隕石中に現存している事が特定されたことにより,我々の自然史を太陽系創世時代を越え先太陽系時代に至るまで実証できる可能性が大きくなっている.本研究では,我々により推進してきた同位体顕微鏡による隕石の微細解剖学をさらに発展させ,隕石のいわゆる『解体新書』を作成する。その成果に基づき,太陽系創世時代とそれに直接つながる先太陽系時代の物質進化を解明し,宇宙における太陽系の特殊性と一般性を区分した新しい太陽系起源論を構築する。そして物質に刻まれた証拠に立脚した汎惑星系起源の構築に挑戦する。具体的には,以下の課題を研究する.
(1)隕石中の先太陽系時代の物質を系統的に探索し,その物質の同位体組成と形成年代を分析し,銀河内の物質循環を解析する.
(2)太陽系における酸素同位体異常とその他元素の同位体的均質性の起源と進化の解明を行い,分子雲時代から太陽系創成時代に至る物質進化のダイナミックスを解析する.
(3)太陽系創世時代における物質大循環に伴う物質進化とそのメカニズムを解析する.

Research Products

• [Journal Article] Hydrogen isotope ratios in lunar rocks indicate delivery of cometary water to the Moon. (2011)
  • Author(s): Greenwood J.P., Itoh S., Sakamoto N., Warren P., Taylor L., Yurimoto H.
  • Journal Title: Nature Geoscience 4 Pages: 79-82
  • Peer Reviewed
• [Journal Article] Ultra-high performance multi-turn TOF-SIMS system with a femto-second laser for post-ionization : investigation of the performance in linear mode. (2010)
  • Author(s): Ishihara M., Ebata S., Kumondai K., Mibuka R., Uchino K., Yurimoto H.
  • Journal Title: Surface and Interface Analysis 42 Pages: 1598-1602
  • Peer Reviewed
• [Journal Article] Analysis of the noise properties of a solid-state SCAPS ion imager and development of software noise reduction. (2010)
  • Author(s): Yamamoto K., Sakamoto N., Yurimoto H.
  • Journal Title: Surface and Interface Analysis 42 Pages: 1603-1605
  • Peer Reviewed
• [Journal Article] Non-chondritic oxygen isotopic component of metals in a noble-gas-rich chondrite-vestige of stellar wind from the protosun? (2009)
  • Author(s): Fujimoto, K., Itoh, S., Ebata, S., Yurimoto, H.
  • Journal Title: Geochemical Journal 43 Pages: 11-15
  • Peer Reviewed
• [Journal Article] Mineralogical characterization of a unique material having heavy oxygen isotope anomaly in matrix of the primitive carbonaceous chondrite Acfer 094. (2008)
  • Author(s): Seto, Y., Sakamoto, N., Fujino, K., Kaito, T., Oikawa, T., Yurimoto, H.
  • Journal Title: Geochimica et Cosmochimica Acta 72(11) Pages: 2723-2734
  • Peer Reviewed
• [Presentation] Oxygen and Magnesium Isotopic Compositions of Asteroidal Materials Returned from Itokawa by the Hayabusa Mission. (2011)
  • Author(s): Yurimoto H.
  • Organizer: 42nd Lunar and Planetary Science Conference
  • Place of Presentation: The Woodlands, Texas, USA
  • Year and Date: 20110307-20110311
• [Presentation] Oxygen isotope analysis of meteorites : the procedures and contribution to solar system evolution. (2011)
  • Author(s): Yurimoto, H.
  • Organizer: Workshop on Cosmo-, Geo- and Environmental Research with NanoSIMS
  • Place of Presentation: Taipei, Taiwan
  • Year and Date: 20110118-20110119
• [Presentation] Isotopic compositions of fluid inclusions in halites from ordinary chondrites. (2010)
  • Author(s): Yurimoto, H.
  • Organizer: 73rd Annual Meeting of the Meteoritical Society
  • Place of Presentation: New York, U.S.A.
  • Year and Date: 20100726-20100730
• [Presentation] Implanted solar wind oxygen about 4.6 billion years ago. (2009)
  • Author(s): Yurimoto, H.
  • Organizer: 5th International Workshop on High-Resolution Depth Profiling, HRDP-5
  • Place of Presentation: Kyoto, Japan
  • Year and Date: 20091115-20091119
• [Presentation] Development of isotope microscope and in-situ observation of presolar grains and other isotope anomalous materials. (2008)
  • Author(s): Yurimoto, H.
  • Organizer: 5th Biennial Geochemical SIMS Workshop (BGSW5)
  • Place of Presentation: Madison, USA)
  • Year and Date: 20080613-20080615
• [Book] Oxygen in the solar system (2008)
  • Author(s): Yurimoto, H., Krot, A.N., Choi, B.-G., Aleon, J., Kunihiro, T., Brearley, A.J.
  • Total Pages: 141-218
  • Publisher: Mineralogical Society of America
• [Book] 宇宙・惑星化学 (2008)
  • Author(s): 圦本尚義
  • Total Pages: 82-111
  • Publisher: 培風館
• [Patent(Industrial Property Rights)] 集束イオンビーム装置 (2009)
  • Inventor(s): 坂口清志, 圦本尚義
  • Industrial Property Rights Holder: 日本電子株式会社, 北海道大学
  • Industrial Property Number: 特許願,特願2009-216413
  • Filing Date: 2009-09-18