A study to evaluate fluid-related process on asteroids by chondrules

2011 Fiscal Year Final Research Report

• Project/Area Number: 22740353
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Geochemistry/Astrochemistry
• Research Institution: Okayama University
• Principal Investigator: KUNIHIRO Takuya 岡山大学, 地球物質科学研究センター, 准教授 (30432628)
• Project Period (FY): 2010 – 2011
• Keywords: 元素分布 / 小惑星 / 局所分析 / 微量元素 / コンドリュール / コンドライト / 二次イオン質量分析法

Research Abstract

The main subject of this research is to develop in-situ analytical technique to determine concentration of fluid-mobile elements and discuss elemental re-distribution at small bodies on the Solar system by fluid related processes. The author succeeded to optimize sample preparation and to have reliable olivine standards by conventional technique, and established in-situ boron-quantitative-analysis with sub-ppm level. The technique was applied to chondrules and abundances of boron in each phase were determined.

Research Products

• [Journal Article] Space environment of an asteroid preserved on micrograins returned by the Hayabusa spacecraft (2012)
  • Author(s): Nakamura, E., Makishima, A., Moriguti, T., Kobayashi, K., Tanaka, R., Kunihiro, T., Tsujimori, T.他計18名
  • Journal Title: PNAS Plus Volume: 109(11) Pages: 4031-4032
  • Peer Reviewed
• [Journal Article] In situion-microprobe determination of trace element partition coefficients for hornblende, plagioclase, orthopyroxene, and apatite in equilibrium with natural rhyolitic glass (2011)
  • Author(s): Brophy, J. G., Ota, T., Kunihiro, T., Tsujimori, T., Nakamura, E
  • Journal Title: Little Glass Mountain Rhyolite, California, Am. Min Volume: 96 Pages: 1838-1850
  • Peer Reviewed
• [Journal Article] The Oxygen Isotopic Composition of the Sun Inferred from Captured Solar Wind (2011)
  • Author(s): Mckeegan, K. D., Kallio, A. P. A., Heber, V. S., Jarzebinski, G., Mao, P. H., Coath, C. D., Kunihiro, T., Wiens, R. C., Nordholt, J. E., Moses Jr, R. W., Reisenfeld, D. B., Jurewicz, A. J. G., Burnett, D. S.
  • Journal Title: Science Volume: 332 Pages: 1528-1532
  • Peer Reviewed
• [Presentation] Space environment of an asteroid preserved on micrograins returned by the Hayabusa spacecraft (2012)
  • Author(s): Nakamura, E., et al
  • Organizer: 43rd Lunar and Planetary Science Conference
  • Place of Presentation: The Woodlands, Texas(USA)
  • Year and Date: 2012-03-22
• [Presentation] Initial analysis of the Hayabusa recovery materials : Trace-element and isotope abundance (2011)
  • Author(s): Kunihiro, T., et al
  • Organizer: 日本地球惑星連合2011大会
  • Place of Presentation: 幕張(千葉県)
  • Year and Date: 2011-05-26
• [Presentation] Initial analysis of the Hayabusa recovery materials : Petrographical characterization (2011)
  • Author(s): Tsujimori, T.
  • Organizer: 日本地球惑星連合2011大会
  • Place of Presentation: 幕張(千葉県)
  • Year and Date: 2011-05-26
• [Presentation] Initial analysis of the Hayabusa recovery materials : Laboratory processing of individual grains (2011)
  • Author(s): Kobayashi, K., et al
  • Organizer: 日本地球惑星連合2011大会
  • Place of Presentation: 幕張(千葉県)
  • Year and Date: 2011-05-26
• [Presentation] Initial analysis of the Hayabusa recovery materials : Overview and highlights at Misasa (2011)
  • Author(s): Nakamura, E., et al
  • Organizer: 日本地球惑星連合2011大会
  • Place of Presentation: 幕張(千葉県)
  • Year and Date: 2011-05-26